The expected bandwidth is an informational parameter used only by higher-layer protocols for calculation. You cannot adjust the actual bandwidth of an interface by using this command.

Examples

# Set the expected bandwidth to 50 kbps for Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] bandwidth 50

default

Use default to restore the default settings for an interface.

Syntax

default

Views

CE1 interface view

CT1 interface view

CT3 interface view

E1-F interface view

Serial interface view

Serial subinterface view

T1-F interface view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

CAUTION:

The default command might interrupt ongoing network services. Make sure you are fully aware of the impact of this command when you use it on a live network.

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This command might fail to restore the default settings for some commands for reasons such as command dependencies and system restrictions. You can use the display this command in interface view to check for these commands, and use their undo forms or follow the command reference to restore their respective default settings. If your restoration attempt still fails, follow the error message instructions to resolve the problem.

Examples

# Restore the default settings of Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] default

description

Use description to configure the description of an interface.

Use undo description to restore the default.

Syntax

description text

undo description

Default

The interface description uses the interface name Interface format, for example, Serial2/1/0 Interface.

Views

CE1 interface view

CT1 interface view

CT3 interface view

E1-F interface view

Serial interface view

Serial subinterface view

T1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

text: Specifies the description, a case-sensitive string of 1 to 255 characters.

Examples

# Configure the description of Serial 2/1/0 as router-interface.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] description router-interface

mtu

Use mtu to set the MTU for an interface.

Use undo mtu to restore the default.

Syntax

mtu size

undo mtu

Default

The MTU of an interface is 1500 bytes.

Views

E1-F interface view

Serial interface view

Serial subinterface view

T1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

size: Sets the maximum transmission unit (MTU) in bytes.The value range for this argument is 128 to 2000.

Usage guidelines

The MTU setting affects IP packet assembly and fragmentation on the interface.

After configuring the MTU for a WAN interface, you must use the shutdown command and then the undo shutdown command on the interface for the modification to take effect.

Examples

# Set the MTU to 1430 bytes for Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] mtu 1430

shutdown

Use shutdown to shut down an interface.

Use undo shutdown to restore the default.

Syntax

shutdown

undo shutdown

Default

A WAN interface is up.

Views

CE1 interface view

CT1 interface view

CT3 interface view

E1-F interface view

Serial interface view

Serial subinterface view

T1-F interface view

Predefined user roles

network-admin

mdc-admin

Examples

# Shut down Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] shutdown

timer-hold

Use timer-hold to set the keepalive interval.

Use undo timer-hold to restore the default.

Syntax

timer-hold seconds

undo timer-hold

Default

The keepalive interval is 10 seconds.

Views

E1-F interface view

Serial interface view

T1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

seconds: Specifies the interval at which an interface sends keepalive packets. The value range is 0 to 32767 seconds.

Usage guidelines

On an interface encapsulated with PPP, FR, or HDLC, the data link layer sends keepalive packets at keepalive intervals to detect the availability of the remote end. The data link layer determines that the peer end is down if it does not receive a response after the maximum number of keepalive attempts have been made. The data link layer then reports the link down event to the upper-layer protocols.

To set the maximum number of keepalive attempts, use the timer-hold retry command.

On a slow link, increase the keepalive interval to prevent false shutdown of the interface. This situation might occur when keepalive packets are delayed because a large packet is being transmitted on the link.

Examples

# Set the keepalive interval to 15 seconds for Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] timer-hold 15

Related commands

timer-hold retry

Use timer-hold retry to set the maximum number of keepalive attempts.

Use undo timer-hold retry to restore the default.

Syntax

timer-hold retry retries

undo timer-hold retry

Default

The maximum number of keepalive attempts is 5.

Views

E1-F interface view

Serial interface view

T1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

retries: Specifies the maximum number of keepalive attempts, in the range of 1 to 255.

Usage guidelines

The interface determines that the remote end is down if it does not receive a response after the maximum number of keepalive attempts have been made.

This command applies to interfaces encapsulated with PPP, FR, or HDLC. To set the keepalive interval, use the timer-hold command.

On a slow link, increase the maximum number of keepalive attempts to prevent false shutdown of the interface. This situation might occur when keepalive packets are delayed because a large packet is being transmitted on the link.

Examples

# Set the maximum number of keepalive attempts to 10 for Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] timer-hold retry 10

Related commands

timer-hold

Serial interface commands

baudrate

Use baudrate to set the baud rate for a synchronous serial interface.

Use undo baudrate to restore the default.

Syntax

baudrate baudrate

undo baudrate

Default

The baud rate is 64000 bps on a synchronous serial interface.

Views

Synchronous serial interface view

Predefined user roles

network-admin

mdc-admin

Parameters

baudrate: Specifies a baud rate (in bps) for a serial interface. The baud rate range on a synchronous serial interface depends on the applied physical electric specifications.

· For V.24 DTE/DCE, available baud rates (in bps) are:

Baud rates
1200	9600	56000
2400	19200	57600
4800	38400	64000

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· For V.35 DCE/DCE, X.21 DTE/DCE, EIA/TIA-449 DTE/DCE, and EIA-530 DTE/DCE, available baud rates (in bps) are:

Baud rates
1200	57600	384000
2400	64000	512000
4800	72000	1024000
9600	115200	2048000
19200	128000	4096000
38400	192000	8192000 bps
56000	256000

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Usage guidelines

This command is available only on serial interfaces on the MIM-2SAE, MIM-4SAE, and MIM-8SAE interface modules.

Take the physical electric specifications of the cable into consideration when you set the baud rate for a serial interface.

The baud rate used by a DCE-DTE pair is determined by the DCE.

Examples

# Set the baud rate to 115200 bps on the DCE-side Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] baudrate 115200

Related commands

virtualbaudrate

clock

Use clock to set the clock selection mode for a synchronous serial interface.

Use undo clock to restore the default.

Syntax

clock { dteclk1 | dteclk2 | dteclk3 | dteclk4 | dteclk5 | dteclkauto }

clock { dceclk1 | dceclk2 | dceclk3 }

undo clock

Default

The DTE-side clock is dteclk1 and the DCE-side clock is dceclk1.

Views

Synchronous serial interface view

Predefined user roles

network-admin

mdc-admin

Parameters

dteclk1: Sets the interface clock selection mode to DTE clock option 1.

dteclk2: Sets the interface clock selection mode to DTE clock option 2.

dteclk3: Sets the interface clock selection mode to DTE clock option 3.

dteclk4: Sets the interface clock selection mode to DTE clock option 4.

dteclk5: Sets the interface clock selection mode to DTE clock option 5.

dteclkauto: Sets the interface clock selection mode to DTE auto-negotiation.

dceclk1: Sets the interface clock selection mode to DCE clock option 1.

dceclk2: Sets the interface clock selection mode to DCE clock option 2.

dceclk3: Sets the interface clock selection mode to DCE clock option 3.

Usage guidelines

In DTE mode, the synchronous serial interface supports the clock { dteclk1 | dteclk2 | dteclk3 | dteclk4 | dteclk5 | dteclkauto } command.

In DCE mode, the synchronous serial interface supports the clock { dceclk1 | dceclk2 | dceclk3 } command.

A synchronous serial interface can operate as a DCE or DTE.

· As a DCE, the interface provides the DCEclk clock for the DTE.

· As a DTE, the interface accepts the clock provided by the DCE. Because transmitting and receiving clocks of synchronization devices are independent, the receiving clock of a DTE device can be either the transmitting or receiving clock of the DCE device. The transmitting clock of a DTE device can be either the transmitting or receiving clock of the DCE device. Therefore, five clock options are available for a DTE device.

In Figure 1, TxClk represents transmitting clock, and RxClk represents receiving clock.

Figure 1 Selecting a clock for a synchronous serial interface

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Table 1 describes the four clock selection options for a synchronous serial interface operating as a DTE. The clock preceding the equal sign (=) is the DTE clock, and the clock that follows the equal sign is the DCE clock.

Table 1 Clock options available for a synchronous serial interface operating as a DTE

Clock selection option	Description
DTEclk1	TxClk = TxClk, RxClk = RxClk.
DTEclk2	TxClk = TxClk, RxClk = TxClk.
DTEclk3	TxClk = RxClk, RxClk = TxClk.
DTEclk4	TxClk = RxClk, RxClk = RxClk.
DTEclk5	TxClk = Local, RxClk = Local.

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Table 2 describes the clock selection options for a synchronous serial interface operating as a DCE. The clock preceding the equal sign (=) is the DCE clock, and the clock that follows the equal sign is the clock signal source.

Table 2 Clock options available for a synchronous serial interface operating as a DCE

Clock selection option	Description
DCEclk1	TxClk = Local, RxClk = Local.
DCEclk2	TxClk = Local, RxClk = Line.
DCEclk3	TxClk = Line, RxClk = Line.

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Examples

# Configure Serial 2/1/0 operating as a DTE to use the clock selection option dteclk2.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] clock dteclk2

code

Use code to configure the digital signal coding format on a synchronous serial interface.

Use undo code to restore the default.

Syntax

code { nrz | nrzi }

undo code

Default

The digital signal coding format is NRZ.

Views

Synchronous serial interface view

Predefined user roles

network-admin

mdc-admin

Parameters

nrz: Sets the digital signal coding format to nonreturn to zero (NRZ).

nrzi: Sets the digital signal coding format to nonreturn to zero inverted (NRZI).

Usage guidelines

This command is available only on serial interfaces on the MIM-2SAE, MIM-4SAE, and MIM-8SAE interface modules.

Examples

# Set the digital signal coding format to NRZI on Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] code nrzi

crc

Use crc to set the CRC mode for a synchronous serial interface.

Use undo crc to restore the default.

Syntax

crc { 16 | 32 | none }

undo crc

Default

16-bit CRC is used.

Views

Synchronous serial interface view

Predefined user roles

network-admin

mdc-admin

Parameters

16: Specifies 16-bit CRC.

32: Specifies 32-bit CRC.

none: Disables CRC.

Examples

# Configure Serial 2/1/0 to use 32-bit CRC.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] crc 32

detect dcd

Use detect dcd to enable data carrier detection (DCD) on a serial interface.

Use undo detect dcd to disable DCD on a serial interface.

Syntax

detect dcd

undo detect dcd

Default

DCD is enabled on a serial interface.

Views

Synchronous serial interface view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

This command is available only on serial interfaces on the MIM-2SAE, MIM-4SAE, and MIM-8SAE interface modules.

When determining whether a synchronous serial interface is up, the system detects by default the DSR signal, DCD signal, and presence of cable connection. The interface is considered to be up only when the three signals are all valid.

Examples

# Enable DCD on Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] detect dcd

Related commands

detect dsr-dtr

Use detect dsr-dtr to enable level detection on a serial interface.

Use undo detect dsr-dtr to disable level detection on a serial interface.

Syntax

detect dsr-dtr

undo detect dsr-dtr

Default

Level detection is enabled on a serial interface.

Views

Synchronous serial interface view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

This command is available only on serial interfaces on the MIM-2SAE, MIM-4SAE, and MIM-8SAE interface modules.

In level detection, the system detects the following items for the data service unit (DSU) or the channel service unit (CSU):

· Data set ready (DSR) signals.

· Data terminal ready (DTR) signals.

When determining whether a synchronous serial interface is up, the system detects by default the DSR signal, DCD signal, and presence of a cable connection. The interface is considered to be up only when the three signals are all valid.

If level detection is disabled on a synchronous serial interface, the system considers the interface to be up after detecting the cable connection. The DTR and DSR are also reported as up.

Examples

# Enable DCD on Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] detect dsr-dtr

Related commands

detect dcd

display interface serial

Use display interface serial to display information about serial interfaces.

Syntax

display interface serial [ interface-number ] [ brief [ description | down ] ]

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

serial [ interface-number ]: Specifies a serial interface by its number. If you do not specify the serial keyword, this command displays information about all interfaces. If you specify the serial keyword without specifying an interface, this command displays information about all serial interfaces.

brief: Displays brief interface information. If you do not specify this keyword, the command displays detailed interface information.

description: Displays complete interface descriptions. If you do not specify this keyword, the command displays only the first 27 characters of interface descriptions.

down: Displays physically down interfaces and their down causes. If you do not specify this keyword, the command displays information about interfaces in all states.

Examples

# Display detailed information about Serial 2/1/0.

<Sysname> display interface serial 2/1/0

Serial2/1/0

Current state: UP

Line protocol state: UP

Description: Serial2/1/0 Interface

Bandwidth: 64kbps

Maximum transmission unit: 1500

Hold timer: 10 seconds, retry times: 5

Internet Address: 9.9.9.6/24 Primary

Link layer protocol: PPP

LCP: opened

Output queue - Urgent queuing: Size/Length/Discards 0/100/0

Output queue - Protocol queuing: Size/Length/Discards 0/500/0

Output queue - FIFO queuing: Size/Length/Discards 0/75/0

Last link flapping: 6 hours 39 minutes 25 seconds

Last clearing of counters: Never

Current system time:2017-12-14 10:00:37

Last time when physical state changed to up:-

Last time when physical state changed to down:2017-12-14 09:47:16

Physical layer: synchronous, Baudrate: 64000 bps

Interface: DCE

Cable type: V35

Clock mode: DCECLK1

Last 300 seconds input rate: 2.40 bytes/sec, 19 bits/sec, 0.20 packets/sec

Last 300 seconds output rate: 2.40 bytes/sec, 19 bits/sec, 0.20 packets/sec

Input:

6668 packets, 80414 bytes

0 broadcasts, 0 multicasts

0 errors, 0 runts, 0 giants

0 crc, 0 align errors, 0 overruns

0 aborts, 0 no buffers, 1 frame errors

Output:

6670 packets, 80446 bytes

0 errors, 0 underruns, 0 collisions

0 deferred

DCD: UP, DTR: UP, DSR: UP, RTS: UP, CTS: UP

# Display brief information about Serial 2/1/0.

<Sysname> display interface serial 2/1/0 brief

Brief information on interfaces in route mode:

Link: ADM - administratively down; Stby - standby

Protocol: (s) - spoofing

Interface Link Protocol Primary IP Description

Ser2/1/0 UP UP(s) --

# Display brief information about all serial interfaces in down state and the causes.

<Sysname> display interface serial brief down

Brief information on interfaces in route mode:

Link: ADM - administratively down; Stby - standby

Interface Link Cause

Ser2/1/0 ADM Administratively

Table 3 Command output

Field	Description
Current state	Physical link state of the interface: · Administratively DOWN—The interface has been shut down by using the shutdown command. · DOWN—The interface is administratively up, but its physical state is down (possibly because no physical link exists or the link has failed). · UP—The interface is both administratively and physically up.
Line protocol state	Data link layer state of the interface. The state is determined through automatic parameter negotiation at the data link layer. · UP—The data link layer protocol is up. · DOWN—The data link layer protocol is down.
Description	Description of the interface.
Bandwidth	Expected bandwidth of the interface.
Maximum transmission unit	MTU of the interface.
Hold timer	Interval at which the interface sends keepalive packets.
retry times	Maximum number of keepalive attempts. The interface determines that the remote end is down if it does not receive a keepalive response after the maximum number of keepalive attempts have been made.
Internet protocol processing: Disabled	The interface is not assigned an IP address and cannot process IP packets.
Internet Address	IP address of the interface. The primary attribute indicates that the address is the primary IP address.
Link layer protocol	Link layer protocol of the interface.
LCP: opened	A PPP connection is established successfully.
Output queue - Urgent queuing: Size/Length/Discards Output queue - Protocol queuing: Size/Length/Discards Output queue - FIFO queuing: Size/Length/Discards	Information about the urgent, protocol, and FIFO output queues: · Size—Number of packets in the queue. · Length—Maximum number of packets that the queue can contain. · Discards—Number of dropped packets.
Last link flapping	The amount of time that has elapsed since the most recent physical state change of the interface. This field displays Never if the interface has been physically down since device startup.
Last clearing of counters	The most recent time that the reset counters interface serial command was executed. This field displays Never if this command has not been executed since the device startup.
Physical layer	Physical layer information.
Baudrate	Baud rate of the interface.
Interface: DCE Cable type: V35 Clock mode: DCECLK1	Synchronizes the clock mode on the DCE side of the interface.
Last 300 seconds input rate 2.40 bytes/sec, 19 bits/sec, 0.20 packets/sec	Average input rates (in Bps, bps, and pps) for the last 300 seconds.
Last 300 seconds output rate 2.40 bytes/sec, 19 bits/sec, 0.20 packets/sec	Average output rates (in Bps, bps, and pps) for the last 300 seconds.
Input: 6668 packets, 80414 bytes 0 broadcasts, 0 multicasts 0 errors, 0 runts, 0 giants 0 crc, 0 align errors, 0 overruns 0 aborts, 0 no buffers, 1 frame errors	Incoming traffic statistics for the interface: · broadcasts—Number of incoming broadcast packets. · multicasts—Number of incoming multicast packets. · errors—Number of error packets detected at the physical layer. · runts—Number of incoming undersized packets. · giants—Number of incoming oversized packets. · crc—Number of incoming normal-size packets with CRC errors. · align errors—Number of incoming packets with alignment errors. · overruns—Number of packet drops because the input rate of the interface exceeded the queuing capability. · frame errors—Number of packets with framing errors. · aborts—Number of anomalous errors. · no buffers—Number of packet drops because the receive buffer is full.
Output: 6670 packets, 80446 bytes 0 errors, 0 underruns, 0 collisions 0 deferred	Outgoing traffic statistics for the interface: · errors—Number of error packets detected at the physical layer. · underruns—Number of packets that fail to be forwarded because the interface reads from memory slower than it forwards packets. · collisions—Number of packets that the interface stopped transmitting because packet collisions were detected during transmission. · deferred—Number of packets that the interface deferred to transmit because of detected collisions or timeout events.
DCD: DOWN, DTR: UP, DSR: DOWN, RTS: UP, CTS: DOWN	Status of Data Carrier Detect (DCD), Data Terminal Ready (DTR), Data Set Ready (DSR), Request to Send (RTS), and Clear to Send (CTS) signals. For more information about DSR, DTR, and DCD, see "detect dcd."
Brief information on interfaces in route mode:	Brief information about Layer 3 interfaces.
Interface	Abbreviated interface name.
Link	Physical link state of the interface: · UP—The interface is physically up. · DOWN—The interface is physically down. · ADM—The interface has been shut down by using the shutdown command. To restore the physical state of the interface, use the undo shutdown command. · Stby—The interface is a backup interface in standby state. To see the primary interface, use the display interface-backup state command.
Protocol	Data link layer protocol state of the interface: · UP—The data link layer protocol of the interface is up. · DOWN—The data link layer protocol of the interface is down. · UP(s)—The data link layer protocol of the interface is up, but the link is an on-demand link or does not exist. The (s) attribute represents the spoofing flag.
Primary IP	Primary IP address of the interface. This field displays two hyphens (--) if the interface does not have an IP address.
Description	Description of the interface.
Cause	Cause for the physical link state of an interface to be DOWN: · Administratively—The interface has been manually shut down by using the shutdown command. To restore the physical state of the interface, use the undo shutdown command. · Not connected—No physical connection exists (possibly because the network cable is disconnected or faulty).

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Related commands

reset counters interface serial

idle-code

Use idle-code to set the line idle code of a synchronous serial interface.

Use undo idle-code to restore the default.

Syntax

idle-code { 7e | ff }

undo idle-code

Default

The line idle code of a synchronous serial interface is 7e.

Views

Synchronous serial interface view

Predefined user roles

network-admin

mdc-admin

Parameters

7e: Sets the line idle code to 7e (hexadecimal).

ff: Sets the line idle code to ff (hexadecimal).

Usage guidelines

In most cases, a synchronous serial interface uses 7e (hexadecimal) to identify the idle state of the line. You might need to set the line idle code to ff (hexadecimal) to interoperate with devices that use ff as the line idle code.

Examples

# Set the line idle code to ff for Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] idle-code ff

interface serial

Use interface serial to create a serial subinterface and enter its view, or enter the view of an existing serial interface or serial subinterface.

Use undo interface serial to remove a serial subinterface.

Syntax

interface serial { interface-number | interface-number.subnumber [ p2mp | p2p ] }

undo interface serial interface-number.subnumber

Default

No serial subinterfaces exist.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

interface-number: Specifies a serial interface by its number.

interface-number.subnumber: Specifies a serial subinterface by its number. The interface-number argument specifies the number of the serial interface. The subnumber argument specifies the subinterface index in the range of 0 to 1023.

p2mp: Sets the subinterface type to point-to-multipoint. By default, a serial subinterface is P2MP type.

p2p: Sets the subinterface type to point-to-point.

Usage guidelines

A subinterface can be created only when the upper data link layer protocol of the serial interface is FR.

Examples

# Create serial subinterface Serial 2/1/0.1.

<Sysname> system-view

[Sysname] interface serial 2/1/0.1

[Sysname-Serial2/1/0.1]

Related commands

link-protocol

invert receive-clock

Use invert receive-clock to invert the receive-clock signal on the DTE-side synchronous serial interface.

Use undo invert receive-clock to restore the default.

Syntax

invert receive-clock

undo invert receive-clock

Default

Receive-clock signal inversion is disabled on DTE-side synchronous serial interfaces.

Views

Synchronous serial interface view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

This command is available only on serial interfaces on the MIM-2SAE, MIM-4SAE, and MIM-8SAE interface modules.

You might need to invert the receive-clock signal on a DTE-side serial interface to eliminate the half clock-period delay on the line. This command is necessary only when the DTE-side serial interface is connected to some special DCE devices. In common applications, do not invert the clock.

Examples

# Invert the receive-clock on DTE-side synchronous serial interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] invert receive-clock

Related commands

invert transmit-clock

Use invert transmit-clock to invert the transmit-clock signal on the DTE-side synchronous serial interface.

Use undo invert transmit-clock to restore the default.

Syntax

invert transmit-clock

undo invert transmit-clock

Default

Transmit-clock signal inversion is disabled on DTE-side synchronous serial interfaces.

Views

Synchronous serial interface view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

This command is available only on serial interfaces on the MIM-2SAE, MIM-4SAE, and MIM-8SAE interface modules.

You might need to invert the transmit-clock signal on a DTE-side serial interface to eliminate the half clock-period delay on the line. This command is necessary only when the DTE-side serial interface is connected to some special DCE devices. In common applications, do not invert the clock.

Examples

# Invert the transmit-clock on DTE-side synchronous serial interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] invert transmit-clock

Related commands

invert receive-clock

itf

Use itf to set the number of interframe filling tags.

Use undo itf to restore the default.

Syntax

itf number number

undo itf number

Default

The number of interframe filling tags is 4.

Views

Synchronous serial interface view

Predefined user roles

network-admin

mdc-admin

Parameters

number number: Sets the number of interframe filling tags, in the range of 0 to 14. An interframe filling tag is one byte in length.

Examples

# Set the number of interframe filling tags to 5.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] itf number 5

link-protocol

Use link-protocol to configure the data link layer protocol for an interface.

Syntax

link-protocol { fr | hdlc | mfr | ppp }

undo link-protocol

Default

A synchronous serial interface uses PPP as the data link layer protocol.

Views

Synchronous serial interface view

Predefined user roles

network-admin

mdc-admin

Parameters

fr: Specifies the FR data link layer protocol.

hdlc: Specifies the HDLC data link layer protocol.

mfr: Specifies the MFR data link layer protocol.

ppp: Specifies the PPP data link layer protocol.

Examples

# Specify HDLC as the data link layer protocol of Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] link-protocol hdlc

loopback

Use loopback to enable loopback on a serial interface.

Use undo loopback to disable loopback on a serial interface.

Syntax

loopback

undo loopback

Default

Loopback is disabled on a serial interface.

Views

Synchronous serial interface view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

Loopback is intended for testing only. Disable the feature when the interface is operating correctly.

Examples

# Enable loopback on Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] loopback

reset counters interface serial

Use reset counters interface serial to clear serial interface statistics.

Syntax

reset counters interface serial [ interface-number ]

Views

User view

Predefined user roles

network-admin

mdc-admin

Parameters

serial [ interface-number ]: Specifies a serial interface by its number. If you do not specify the serial keyword, this command clears statistics for all interfaces. If you specify the serial keyword without specifying an interface, this command clears statistics for all serial interfaces.

Usage guidelines

Use this command to clear history statistics before you collect traffic statistics for a time period.

Examples

# Clear statistics for Serial 2/1/0.

<Sysname> reset counters interface serial 2/1/0

Related commands

display interface serial

reverse-rts

Use reverse-rts to reverse RTS signal.

Use undo reverse-rts to restore the default.

Syntax

reverse-rts

undo reverse-rts

Default

RTS signal reverse is disabled.

Views

Synchronous serial interface view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

This command is available only on serial interfaces on the MIM-2SAE, MIM-4SAE, and MIM-8SAE interface modules.

When this command is configured, the remote end is not allowed to send data while the local end is sending data.

Use this command only for debugging purposes.

Examples

# Reverse the RTS signal.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] reverse-rts

sub-interface rate-statistic

Use sub-interface rate-statistic to enable subinterface rate statistics collection on a serial interface.

Use undo sub-interface rate-statistic to disable subinterface rate statistics collection on a serial interface.

Syntax

sub-interface rate-statistic

undo sub-interface rate-statistic

Default

The system does not collect subinterface rate statistics for a serial interface.

Views

Synchronous interface view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

CAUTION:

This command is resource intensive. When you use this command, make sure you fully understand its impact on system performance.

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The subinterface rate statistics collection feature is available only on the following serial interfaces:

· Synchronous serial interfaces.

· Serial interfaces created through channelization.

Examples

# Enable subinterface rate statistics collection on Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] sub-interface rate-statistic

Related commands

reset counters interface serial

virtualbaudrate

Use virtualbaudrate to set a virtual baud rate for a DTE-side interface.

Use undo virtualbaudrate to remove the virtual baud rate.

Syntax

virtualbaudrate virtualbaudrate

undo virtualbaudrate

Default

The virtual baud rate for a synchronous serial interface is 64000 bps.

Views

Synchronous serial interface view

Predefined user roles

network-admin

mdc-admin

Parameters

virtualbaudrate: Specifies a virtual baud rate (in bps). Available values are:

Virtual baud rates
1200	57600	384000
2400	64000	512000
4800	72000	1024000
9600	115200	2048000
19200	128000	4096000
38400	192000
56000	256000

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Usage guidelines

This command is available only on serial interfaces on the MIM-2SAE, MIM-4SAE, and MIM-8SAE interface modules.

When operating as a DTE, the serial interface automatically sets its baud rate to be the same as the DCE side through negotiation.

If you use this command to set the baud rate of a DTE-side interface, you must make sure the baud rate is the same as the DCE-side interface.

If the clock selection mode of the serial interface is dteclk5, the configured virtual baud rate is the line rate.

Configure the baudrate command on the DCE side and the virtualbaudrate command on the DTE side only when the interface is operating in synchronous mode. Do not configure the two commands at the same end of a link.

On the DCE side, the display interface command displays the baud rate of the interface. On the DTE side, the command displays the virtual baud rate of the interface.

Examples

# Set the virtual baud rate to 19200 bps on the DTE-side interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] virtualbaudrate 19200

Related commands

baudrate

clock

Basic CE1 interface commands

alarm-detect

Use alarm-detect to enable RAI detection on an interface.

Use undo alarm-detect to disable RAI detection on an interface.

Syntax

alarm-detect rai

undo alarm-detect rai

Default

RAI detection is enabled on an interface.

Views

CE1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

rai: Remote Alarm Indication (RAI).

Usage guidelines

This command is applicable when the interface operates in CE1 mode.

Examples

# Enable RAI detection on E1 2/3/0.

<Sysname> system-view

[Sysname] controller e1 2/3/0

[Sysname-E1 2/3/0] alarm-detect rai

cable (CE1 interface)

Use cable to set the cable type for a CE1 interface.

Use undo cable to restore the default.

Syntax

cable { long | short }

undo cable

Default

The long keyword applies.

Views

CE1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

long: Specifies the attenuation of the receiver as –43 dB.

short: Specifies the attenuation of the receiver as –10 dB.

Examples

# Set the cable length matching E1 2/3/0 to short.

<Sysname> system-view

[Sysname] controller e1 2/3/0

[Sysname-E1 2/3/0] cable short

channel-set (CE1 interface)

Use channel-set to bundle timeslots on a CE1 interface into a channel set.

Use undo channel-set to cancel the bundling.

Syntax

channel-set set-number timeslot-list list

undo channel-set [ set-number ]

Default

No channel sets exist on an interface.

Views

CE1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

set-number: Specifies the number of the channel set for the timeslot bundle. The value range is 0 to 30.

timeslot-list list: Specifies a comma-separated list of timeslot items. An item can be an individual timeslot or a timeslot range. Use a hyphen (-) to separate the start and end timeslot numbers of a range. The value range for the timeslot number is 1 to 31.

Usage guidelines

A CE1 interface in CE1 mode is physically divided into 32 timeslots numbered 0 through 31. All the timeslots except timeslot 0 can be bundled into multiple channel sets. For each channel set, the system automatically creates a serial interface that has the same logical features as a standard synchronous serial interface.

The serial interface name uses the serial interface-number:set-number format. The interface-number argument specifies the CE1 interface number. The set-number argument specifies the channel set number.

Examples

# Bundle timeslots 1, 2, 5, 10 through 15, and 18 into channel set 0 on E1 2/3/0.

<Sysname> system-view

[Sysname] controller e1 2/3/0

[Sysname-E1 2/3/0] channel-set 0 timeslot-list 1,2,5,10-15,18

clock (CE1 interface)

Use clock to set the clock mode of a CE1 interface.

Use undo clock to restore the default.

Syntax

clock { master | slave }

undo clock

Default

The clock mode of a CE1 interface is slave.

Views

CE1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

master: Sets the clock mode to master.

slave: Sets the clock mode to slave.

Usage guidelines

When the clock mode of an interface is master, it uses the internal clock source. When the clock mode of an interface is slave, it uses the line clock source.

Set the clock mode for an interface according to its operating mode:

· When the interface is operating in DCE mode, set its clock mode to master.

· When the interface is operating in DTE mode, set its clock mode to slave.

Examples

# Set the clock mode to master for CE1 interface E1 2/3/0.

<Sysname> system-view

[Sysname] controller e1 2/3/0

[Sysname-E1 2/3/0] clock master

clock-change auto

Use clock-change auto to enable automatic clock mode switchover on an interface.

Use undo clock-change auto to disable automatic clock mode switchover.

Syntax

clock-change auto

undo clock-change auto

Default

Automatic clock mode switchover is disabled on an interface.

Views

CE1 interface view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

When automatic clock mode switchover is enabled, the interface automatically switches to the master clock mode when both of the following conditions exist:

· The interface uses the slave clock mode.

· The interface receives an alarm indication signal (AIS), loss of signal (LOS), or loss of frame (LOF) alarm.

After the alarm is cleared, the interface automatically switches back to the slave mode.

When automatic clock mode switchover is disabled, the interface uses the user-configured clock mode.

Examples

# Enable automatic clock mode switchover for E1 2/3/0.

<Sysname> system-view

[Sysname] controller e1 2/3/0

[Sysname-E1 2/3/0] clock-change auto

Related commands

clock

code (CE1 interface)

Use code to set the line code format for a CE1 interface.

Use undo code to restore the default.

Syntax

code { ami | hdb3 }

undo code

Default

The line code format is HDB3 for the CE1 interface.

Views

CE1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

ami: Specifies the alternate mark inversion (AMI) line code format.

hdb3: Specifies the high-density bipolar 3 (HDB3) line code format.

Usage guidelines

An interface must use the same line code format as its remote end.

For the interface to operate correctly, configure the data-coding inverted command on the interface if the AMI format is used.

Examples

# Set the line code format to AMI for E1 2/3/0.

<Sysname> system-view

[Sysname] controller e1 2/3/0

[Sysname-E1 2/3/0] code ami

Related commands

data-coding

controller e1

Use controller e1 to enter CE1 interface view.

Syntax

controller e1 interface-number

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

interface-number: Specifies a CE1 interface by its number.

Examples

# Enter E1 2/3/0 interface view.

<Sysname> system-view

[Sysname] controller e1 2/3/0

[Sysname-E1 2/3/0]

data-coding (CE1 interface)

Use data-coding to enable user data inversion on a CE1 interface.

Use undo data-coding to restore the default.

Syntax

data-coding { inverted | normal }

undo data-coding

Default

Data inversion is disabled on a CE1 interface.

Views

CE1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

inverted: Enables user data inversion.

normal: Disables user data inversion.

Usage guidelines

To prevent 7e in valid data from being mistaken for padding characters, HDLC inserts a zero after every five consecutive ones in the data stream. In data inversion, each bit one is inverted to bit zero, and each bit zero is inverted to bit one. After the inversion, at least a bit one is present in every eight consecutive bits.

When AMI encoding is used on an E1 interface, data inversion eliminates the presence of multiple consecutive zeros.

The data inversion setting must be the same on the CE1 interfaces at two ends of an E1 line.

Examples

# Enable user data inversion on E1 2/3/0.

<Sysname> system-view

[Sysname] controller e1 2/3/0

[Sysname-E1 2/3/0] data-coding inverted

detect-ais

Use detect-ais to enable alarm indication signal (AIS) detection on an interface.

Use undo detect-ais to disable AIS detection.

Syntax

detect-ais

undo detect-ais

Default

AIS detection is enabled on an interface.

Views

CE1 interface view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

This command takes effect when a CE1 interface operates in E1 mode.

Examples

# Enable AIS detection on E1 2/3/0.

<Sysname> system-view

[Sysname] controller e1 2/3/0

[Sysname-E1 2/3/0] detect-ais

display controller e1

Use display controller e1 to display information about CE1 interfaces.

Syntax

display controller [ e1 [ interface-number ] ]

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

e1 [ interface-number ]: Specifies a CE1 interface by its number. If you do not specify the e1 keyword, the command displays information about all CE1 interfaces, CPOS interfaces, CE3 interfaces, CT1 interfaces, and CT3 interfaces. If you specify the e1 keyword without specifying an interface, the command displays information about all CE1 interfaces.

Examples

# Display information about E1 2/3/0.

<Sysname> display controller e1 2/3/0

E1 2/3/0

Current state: UP

Description: E1 2/3/0 Interface

Last clearing of counters: Never

Current system time:2017-11-11 15:51:05

Last time when physical state changed to up:2017-11-11 15:51:00

Last time when physical state changed to down:2017-11-11 15:50:51

Basic Configuration:

Work mode: E1 framed, Cable type: 75 Ohm unbalanced

Frame-format: no-crc4, Line code: hdb3, Source clock: slave

Idle code: 7e, Itf type: 7e, Itf number: 4, Loop back: not set

Alarm State:

Receiver alarm state is None.

Historical Statistics:

Data in current interval (3398 seconds elapsed):

Loss Frame Alignment: 0 seconds, Framing Error: 1 seconds

CRC Error: 0 seconds, Alarm Indication: 0 seconds

Loss-of-signals: 1 seconds, Code Violations: 1 seconds

Slip: 0 seconds, E-Bit error: 0 seconds

Table 4 Command output

Field	Description
Current state	Physical link state of the interface: · Administratively DOWN—The interface has been shut down by using the shutdown command. · DOWN—The interface is administratively up, but its physical state is down (possibly because no physical link exists or the link has failed). · UP—The interface is both administratively and physically up.
Description	Description of the interface.
Work mode	Operating mode of the interface: E1 or CE1.
Cable type	Cable type of the interface.
Frame-format	Framing format of the E1 interface.
Line code	Line code: AMI or HDB3.
Source clock	Clock source used by the interface: master or slave.
Idle code	Idle code: 7e or ff.
Itf type	Interframe filling tag: 7e or ff.
Itf number	Number of interframe filling tags between two successive frames.
Loopback	Loopback state.
Historical Statistics	Statistics for the interface.
Last clearing of counters	The most recent time that the reset counters controller e1 command was executed. This field displays Never if this command has not been executed since the device startup.
Data in current interval (3398 seconds elapsed): Loss Frame Alignment: 0 seconds, Framing Error: 1 seconds CRC Error: 0 seconds, Alarm Indication: 0 seconds Loss-of-signals: 1 seconds, Code Violations: 1 seconds Slip: 0 seconds, E-Bit error: 0 seconds	Error statistics for the current interval.

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Related commands

reset counters controller e1

frame-format (CE1 interface)

Use frame-format to set the framing format for a CE1 interface.

Use undo frame-format to restore the default.

Syntax

frame-format { crc4 | no-crc4 }

undo frame-format

Default

The framing format on a CE1 interface is no-CRC4.

Views

CE1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

crc4: Sets the framing format to CRC4.

no-crc4: Sets the framing format to no-CRC4.

Usage guidelines

A CE1 interface in CE1 mode supports both CRC4 and no-CRC4 framing formats. Only CRC4 supports four-bit CRC on physical frames.

Examples

# Set the framing format to CRC4 on E1 2/3/0.

<Sysname> system-view

[Sysname] controller e1 2/3/0

[Sysname-E1 2/3/0] frame-format crc4

idle-code (CE1 interface)

Use idle-code to set the line idle code on a CE1 interface.

Use undo idle-code to restore the default.

Syntax

Idle-code { 7e | ff }

undo idle-code

Default

The line idle code on a CE1 interface is 7e.

Views

CE1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

7e: Sets the line idle code to 7e (hexadecimal).

ff: Sets the line idle code to ff (hexadecimal).

Usage guidelines

The line idle code is sent in timeslots that are not bundled into logical channels.

Examples

# Set the line idle code to 7e on E1 2/3/0.

<Sysname> system-view

[Sysname] controller e1 2/3/0

[Sysname-E1 2/3/0] idle-code 7e

itf (CE1 interface)

Use itf to set the type and number of interframe filling tags on a CE1 interface.

Use undo itf to restore the default.

Syntax

itf { number number | type { 7e | ff } }

undo itf { number | type }

Default

The interframe filling tag is 7e and the number of interframe filling tags is 4 on CE1 interfaces. The number of interframe filling tags is fixed at 0 for interfaces on MIC-X-ET16 interface modules.

Views

CE1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

number number: Sets the number of interframe filling tags, in the range of 0 to 14. An interframe filling tag is one byte in length.

type: Specifies the interframe filling tag type.

7e: Sets the interframe filling tag type to 7e (hexadecimal).

ff: Sets the interframe filling tag type to ff (hexadecimal).

Usage guidelines

Interframe filling tags are sent when no service data is sent on the timeslots that are bundled into logical channels on the CE1 interface.

If the ff interframe filling tag is used on a CE1 interface in E1 mode, consecutive ones sent when the line is idle might trigger AIS alarms. To prevent false AIS alarms, use the undo detect-ais command to disable AIS detection.

Examples

# Set the type of interframe filling tag to ff on E1 2/3/0.

<Sysname> system-view

[Sysname] controller e1 2/3/0

[Sysname-E1 2/3/0] itf type ff

# Set the number of interframe filling tags to 5 on E1 2/3/0.

<Sysname> system-view

[Sysname] controller e1 2/3/0

[Sysname-E1 2/3/0] itf number 5

loopback (CE1 interface)

Use loopback to enable loopback and set the loopback mode on an interface.

Use undo loopback to disable loopback on an interface.

Syntax

loopback { local | payload | remote }

undo loopback

Default

Loopback is disabled on a CE1 interface.

Views

CE1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

local: Sets the interface to operate in local loopback mode.

payload: Sets the interface to operate in external payload loopback mode.

remote: Sets the interface to operate in external loopback mode.

Usage guidelines

Loopback is intended for testing only. Disable the feature when the interface is operating correctly.

You can bundle timeslots on the CE1 interface to form a serial interface and encapsulate it with PPP. After you enable loopback on this serial interface, it is normal that the state of the link layer protocol is reported as down.

Examples

# Set E1 2/3/0 to operate in internal loopback mode.

<Sysname> system-view

[Sysname] controller e1 2/3/0

[Sysname-E1 2/3/0] loopback local

reset counters controller e1

Use reset counters controller e1 to clear CE1 interface statistics.

Syntax

reset counters controller e1 [ interface-number ]

Views

User view

Predefined user roles

network-admin

mdc-admin

Parameters

interface-number: Specifies a CE1 interface by its number. If you do not specify this argument, the command clears statistics for all CE1 interfaces.

Usage guidelines

The reset counters interface command clears statistics for all interfaces.

To display CE1 interface statistics, use the display controller e1 command.

Examples

# Clear statistics for CE1 interface E1 2/3/0.

<Sysname> reset counters controller e1 2/3/0

Related commands

display controller e1

using (CE1 interface)

Use using to set the operating mode of a CE1 interface.

Use undo using to restore the default.

Syntax

using { ce1 | e1 }

undo using

Default

A CE1 interface operates in channelized mode.

Views

CE1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

ce1: Sets the interface to operate in channelized mode.

e1: Sets the interface to operate in E1 mode.

Usage guidelines

A CE1 interface can operate in channelized or unchannelized mode.

· Channelized modes include CE1 mode. In CE1 mode, the CE1 interface is physically divided into 32 timeslots numbered 0 through 31. Timeslot 0 is used for FSC.

· Unchannelized modes include CEM mode and E1 mode.

¡ For a CE1 interface in E1 mode, the system automatically creates a 2.048 Mbps serial interface. The interface name uses the serial interface-number:0 format. The interface-number argument specifies the CE1 interface number. This interface has the same logical features as a standard synchronous serial interface.

Examples

# Set E1 2/3/0 to operate in E1 mode.

<Sysname> system-view

[Sysname] controller e1 2/3/0

[Sysname-E1 2/3/0] using e1

Basic CT1 interface commands

alarm-detect

Use alarm-detect to enable RAI detection on an interface.

Use undo alarm-detect to disable RAI detection on an interface.

Syntax

alarm-detect rai

undo alarm-detect rai

Default

RAI detection is enabled on an interface.

Views

CT1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

rai: Remote Alarm Indication (RAI).

Usage guidelines

This command is applicable when the framing format used on the interface is ESF.

Examples

# Enable RAI detection on T1 2/4/0.

<Sysname> system-view

[Sysname] controller t1 2/4/0

[Sysname-T1 2/4/0] alarm detect rai

alarm-threshold

Use alarm-threshold to set LOS, AIS, or LFA alarm thresholds on a CT1 interface.

Use undo alarm-threshold to restore the default.

Syntax

alarm-threshold { ais { level-1 | level-2 } | lfa { level-1 | level-2 | level-3 | level-4 } | los { pulse-detection | pulse-recovery } value }

undo alarm-threshold { ais | lfa | los { pulse-detection | pulse-recovery } }

Default

For AIS and LFA, the alarm threshold is level-1.

For LOS, the pulse-detection threshold is 176, and pulse-recovery threshold is 22. A LOS alarm is generated if the number of pulses detected within 176 pulse intervals is less than 22.

Views

CT1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

ais: Specifies an alarm indication signal (AIS) alarm.

· level-1: Specifies the condition when the number of zeros in the bit stream of an SF or ESF frame is less than or equal to 2.

· level-2: Specifies one of the following conditions:

¡ In an SF frame, the number of zeros is less than or equal to 3 in the bit stream.

¡ In an ESP frame, the number of zeros is less than or equal to 5 in the bit stream.

lfa: Specifies a loss of frame alignment (LFA) alarm.

· level-1: Specifies the condition when two of four frame alignment bits are lost.

· level-2: Specifies the condition when two of five frame alignment bits are lost.

· level-3: Specifies the condition when two of six frame alignment bits are lost.

· level-4: Specifies the condition when errors are detected in four consecutive ESF frames. This keyword is available only for ESF frames.

los: Specifies a loss of signal (LOS) alarm.

· pulse-detection: Specifies the pulse detection duration threshold of the LOS alarm, in units of pulse intervals.

· pulse-recovery: Specifies the pulse threshold of the LOS alarm.

value: Specifies the value of the pulse-detection threshold or pulse-recovery threshold.

· For the pulse-detection threshold, this argument is in the range of 16 to 4096.

· For the pulse-recovery threshold, this argument is in the range of 1 to 256.

If the number of the pulses detected during the total length of the specified pulse detection intervals is smaller than the pulse-recovery threshold, a LOS alarm occurs.

Examples

# Set the number of detection intervals to 300 for the pulse detection duration threshold.

<Sysname> system-view

[Sysname] controller t1 2/4/0

[Sysname-T1 2/4/0] alarm-threshold los pulse-detection 300

bert (CT1 interface)

Use bert to start a bit error rate test (BERT) on an interface.

Use undo bert to stop the BERT test running on an interface.

Syntax

bert pattern { 2^20 | 2^15 } time minutes [ unframed ]

undo bert

Default

No BERT test is performed on an interface.

Views

CT1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

pattern: Sets a BERT pattern.

· 2^15: Specifies the pattern length (in bits) as two to the fifteenth power.

· 2^20: Specifies the pattern length (in bits) as two to the twentieth power.

time minutes: Sets the duration (in minutes) of a BERT test. The minutes argument is in the range of 1 to 1440.

unframed: Sets the test pattern to cover the overhead bits of the frame.

Usage guidelines

The CT1 interface supports only the 2^15 and 2^20 BERT patterns defined in ITU O.151, ITU O.153, and ANSI T1.403-1999.

To perform a BERT test, the local end sends out a pattern. The pattern is looped over on the line and sent back to the local end. The local end examines the received pattern for bit error rate to help determine the line condition. You must configure loopback to allow the transmitted pattern to loop back from a point on the line. For example, enable far-end loopback on the remote interface.

To display the state and result of the BERT test, use the display controller t1 command.

Examples

# Run a 10-minute 2^20 BERT test on T1 2/4/0.

<Sysname> system-view

[Sysname] controller t1 2/4/0

[Sysname-T1 2/4/0] bert pattern 2^20 time 10

Related commands

display controller t1

cable (CT1 interface)

Use cable to set the cable attenuation and length on a CT1 interface.

Use undo cable to restore the default.

Syntax

cable { long { 0db | -7.5db | -15db | -22.5db } | short { 133ft | 266ft | 399ft | 533ft | 655ft } }

undo cable

Default

The cable length is long 0db on a CT1 interface.

Views

CT1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

long: Matches 199.6-meter (655-feet) and longer cable length. The options for this parameter include 0db, -7.5db, -15db, and -22.5db. The attenuation parameter is selected depending on the signal quality received at the receiving end. No external CSU is needed.

short: Matches a cable length shorter than 199.6 meters (655 feet). The options for this parameter include 133ft, 266ft, 399ft, 533ft, and 655ft. The length argument is selected depending on the actual transmission distance.

Usage guidelines

You can use this command to adapt signal waveform to different transmission conditions such as the quality of the signal received by the receiver. If the signal quality is good, you can use the default setting. The CT1 interface does not need an external CSU device.

Examples

# Set the cable length to 40.5 meters (133 feet) on CT1 interface T1 2/4/0.

<Sysname> system-view

[Sysname] controller t1 2/4/0

[Sysname-T1 2/4/0] cable short 133ft

channel-set (CT1 interface)

Use channel-set to bundle timeslots on a CT1 interface into a channel set.

Use undo channel-set to remove a channel set.

Syntax

channel-set set-number timeslot-list list [ speed { 56k | 64k } ]

undo channel-set [ set-number ]

Default

No channel sets exist on a CT1 interface.

Views

CT1/PRI interface view

Predefined user roles

network-admin

mdc-admin

Parameters

set-number: Number of the channel set for the timeslot bundle. The value range is 0 to 23.

speed { 56k | 64k }: Speed of the timeslot bundle (the channel set) in kbps. If 56k is selected, the timeslots are bundled into n × 56 kbps bundles. If 64k (the default) is selected, the timeslots are bundled into n × 64 kbps bundles.

Usage guidelines

A CT1 interface is divided into 24 timeslots numbered 1 through 24. In actual applications, all the timeslots can be bundled into multiple channel sets. For each channel set, the system automatically creates a serial interface that has the same logical features as a standard synchronous serial interface.

The serial interface name uses the serial interface-number:set-number format. The interface-number argument specifies the CT1 interface number. The set-number argument specifies the channel set number.

Examples

# Bundle timeslots 1, 2, 5, 10 through 15, and 18 into channel set 0 on T1 2/4/0.

<Sysname> system-view

[Sysname] controller t1 2/4/0

[Sysname-T1 2/4/0] channel-set 0 timeslot-list 1,2,5,10-15,18

clock (CT1 interface)

Use clock to set the clock mode of a CT1 interface.

Use undo clock to restore the default.

Syntax

clock { master | slave }

undo clock

Default

The clock mode of a CT1 interface is slave.

Views

CT1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

master: Sets the clock mode to master.

slave: Sets the clock mode to slave.

Usage guidelines

When the clock mode of a CT1 interface is master, it uses the internal clock source. When the clock mode of a CT1 interface is slave, it uses the line clock source.

Set the clock mode for a CT1 interface as follows:

· When the CT1 interface is operating in DCE mode, set its clock mode to master.

· When the interface is operating in DTE mode, set its clock mode to slave.

· When two CT1 interfaces on two routers are directly connected, configure the two ends with different clock modes.

· When the CT1 interface on a router is connected to a switch, the CT1 interface on the router operates as a DTE. The switch operates as a DCE. Set the clock mode of the CT1 interface on the router to slave to accept the clock provided by the switch.

Examples

# Set the clock mode to master on T1 2/4/0.

<Sysname> system-view

[Sysname] controller t1 2/4/0

[Sysname-T1 2/4/0] clock master

code (CT1 interface)

Use code to set the line code format for a CT1 interface.

Use undo code to restore the default.

Syntax

code { ami | b8zs }

undo code

Default

The line code format is B8ZS for the CT1 interface.

Views

CT1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

ami: Specifies the AMI line code format.

b8zs: Specifies the bipolar 8-zero substitution (B8ZS) line code format.

Usage guidelines

A CT1 interface must use the same line code format as its remote end.

For the interface to operate correctly, configure the data-coding inverted command on the interface if the AMI format is used.

Examples

# Set the line code format to AMI for T1 2/4/0.

<Sysname> system-view

[Sysname] controller t1 2/4/0

[Sysname-T1 2/4/0] code ami

Related commands

data-coding

controller t1

Use controller t1 to enter CT1 interface view.

Syntax

controller t1 interface-number

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

interface-number: Specifies a CT1 interface by its number.

Examples

# Enter the view of T1 2/4/0.

<Sysname> system-view

[Sysname] controller t1 2/4/0

[Sysname-T1 2/4/0]

data-coding (CT1 interface)

Use data-coding to enable user data inversion on a CT1 interface.

Use undo data-coding to restore the default.

Syntax

data-coding { inverted | normal }

undo data-coding

Default

Data inversion is disabled on a CT1 interface.

Views

CT1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

inverted: Enables user data inversion.

normal: Disables user data inversion.

Usage guidelines

When AMI encoding is used on a T1 interface, data inversion eliminates the presence of multiple consecutive zeros.

The data inversion setting must be the same on the CT1 interfaces at two ends of a T1 line.

Examples

# Enable user data inversion on T1 2/4/0.

<Sysname> system-view

[Sysname] controller t1 2/4/0

[Sysname-T1 2/4/0] data-coding inverted

display controller t1

Use display controller t1 to display information about CT1 interfaces.

Syntax

display controller [ t1 [ interface-number ] ]

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

t1 [ interface-number ]: Specifies a CT1 interface by its number. If you do not specify the t1 keyword, the command displays information about all CT1 interfaces, CPOS interfaces, CE3 interfaces, CE1 interfaces, and CT3 interfaces. If you specify the t1 keyword without specifying an interface, the command displays information about all CT1 interfaces.

Examples

# Display information about T1 2/4/0.

<Sysname> display controller t1 2/4/0

T1 2/4/0

Current state: UP

Description: T1 2/2/2/1 Interface

Last clearing of counters: Never

Current system time:2017-11-11 16:11:54

Last time when physical state changed to up:2017-11-11 16:04:52

Last time when physical state changed to down:2017-11-11 16:04:49

Basic Configuration:

Work mode: T1 framed, Cable type: 100 Ohm balanced

Frame-format: esf, fdl: none, Line code: b8zs

Source clock: slave, Data-coding: normal

Idle code: ff, Itf type: ff, Itf number: 2

Loop back: not set

Alarm State:

Receiver alarm state is Loss-of-Signal

Transmitter is sending remote alarm

Pulse density violation detected

SendLoopCode History:

Inband-llb-up: 0 times, Inband-llb-down: 0 times

Fdl-ansi-llb-up: 0 times, Fdl-ansi-llb-down: 0 times

Fdl-ansi-plb-up: 0 times, Fdl-ansi-plb-down: 0 times

Fdl-att-plb-up: 0 times, Fdl-att-plb-down: 0 times

BERT state:(stopped, not completed)

Test pattern: 2^15, Status: Not Sync, Sync Detected: 0

Time: 0 minutes, Time past: 0 minutes

Bit Errors (since test started): 0 bits

Bits Received (since test started): 0 Kbits

Bit Errors (since latest sync): 0 bits

Bits Received (since latest sync): 0 Kbits

Historical Statistics:

Last link flapping: 6 hours 39 minutes 25 seconds

Data in current interval (285 seconds elapsed):

Line Code Violations: 0, Path Code Violations: 0

Ais Alarm: 0 seconds, Los Alarm: 286 seconds

Slip: 7 seconds, Fr Loss: 286 seconds

Line Err: 0 seconds, Degraded: 0 minutes

Errored: 0 seconds, Bursty Err: 0 seconds

Severely Err: 0 seconds, Unavail: 286 seconds

Data in Interval 1:

Line Code Violations: 0, Path Code Violations: 0

Ais Alarm: 0 seconds, Los Alarm Secs: 901 seconds

Slip: 22 seconds, Fr Loss: 901 seconds

Line Err: 0 seconds, Degraded: 0 minutes

Errored: 0 seconds, Bursty Err: 0 seconds

Severely Err: 0 seconds, Unavail: 901 seconds

Data in Interval 2:

Line Code Violations: 0, Path Code Violations: 0

Ais Alarm: 0 seconds, Los Alarm: 900 seconds

Slip: 23 seconds, Fr Loss: 900 seconds

Line Err: 0 seconds, Degraded: 0 minutes

Errored: 0 seconds, Bursty Err: 0 seconds

Severely Err: 0 seconds, Unavail: 900 seconds

Total Data (last 2 15 minute intervals):

Line Code Violations: 0, Path Code Violations: 0

Ais Alarm: 0 seconds, Los Alarm: 2087 seconds

Slip: 52 seconds, Fr Loss: 2087 seconds

Line Err: 0 seconds, Degraded: 0 minutes

Errored: 0 seconds, Bursty Err: 0 seconds

Severely Err: 0 seconds, Unavail: 2087 seconds

Table 5 Command output

Field	Description
Current state	Physical link state of the interface: · Administratively DOWN—The interface has been shut down by using the shutdown command. · DOWN—The interface is administratively up, but its physical state is down (possibly because no physical link exists or the link has failed). · UP—The interface is both administratively and physically up.
Description	Description of the interface.
Basic Configuration	Basic configurations of the interface.
Work mode	Operating mode of the interface.
Cable type	Cable type of the interface.
Frame-format	Frame format configured on the interface: ESF or SF.
fdl	FDL format: ANSI, ATT, or none.
Line code	Line code: AMI or B8ZS.
Source clock	Clock source used by the interface: master or slave.
Data-coding	Normal or inverted.
Idle code	Idle code: 7e or ff.
Itf type	Type of interframe filling tag: 7e or ff.
Itf number	Number of interframe filling tags.
Loop back	Loopback setting on the interface: local, payload, remote, or not set.
Receiver alarm state is Loss-of-Signal	Type of received alarm: none, LOS, LOF, RAI, or AIS.
Transmitter is sending remote alarm.	Type of transmitted alarm: RAI, or none.
Pulse density violation detected	The detected pulse density is incompliant with the specification.
SendLoopCode History: Inband-llb-up: 0 times, Inband-llb-down: 0 times Fdl-ansi-llb-up: 0 times, Fdl-ansi-llb-down: 0 times Fdl-ansi-plb-up: 0 times, Fdl-ansi-plb-down: 0 times Fdl-att-plb-up: 0 times, Fdl-att-plb-down: 0 times	History of loopback code sending to the peer end, including the number of transmissions for each type of code, and the type of the last sent code.
BERT state	BERT test state: · completed—The test has been completed. · stopped—The test has been manually terminated. · running—The test is running.
Test pattern	Test pattern in use (2^20 or 2^15).
Status	Whether synchronization is being performed.
¡ Sync Detected	Number of detected synchronizations.
Time	Duration of the BERT test.
Time past	Time that has elapsed.
Bit Errors (since test started)	Number of bit errors received since the start of the BERT test.
Bits Received (since test started)	Number of bits received since the start of the BERT test.
Bit Errors (since latest sync)	Number of bit errors received since last synchronization.
Bits Received (since latest sync)	Number of bits received since last synchronization.
Historical Statistics	Historical statistics for the interface.
Last link flapping	The amount of time that has elapsed since the most recent physical state change of the interface. This field displays Never if the interface has been physically down since device startup.
Last clearing of counters	The most recent time that the reset counters controller t1 command was executed. This field displays Never if this command has not been executed since the device startup.
Data in current interval (285 seconds elapsed): Line Code Violations: 0, Path Code Violations: 0 Ais Alarm: 0 seconds, Los Alarm: 286 seconds Slip: 7 seconds, Fr Loss: 286 seconds Line Err: 0 seconds, Degraded: 0 minutes Errored: 0 seconds, Bursty Err: 0 seconds Severely Err: 0 seconds, Unavail: 286 seconds	Statistics in the current interval. The statistical items, such as AIS alarm, LOS signal, and LFA, are provided according to the T1 specifications for the physical layer. For more information, see ANSI T1.403 and AT&T TR 54016.
Data in Interval 1: Line Code Violations: 0, Path Code Violations: 0 Ais Alarm: 0 seconds, Los Alarm Secs: 901 seconds Slip: 22 seconds, Fr Loss: 901 seconds Line Err: 0 seconds, Degraded: 0 minutes Errored: 0 seconds, Bursty Err: 0 seconds Severely Err: 0 seconds, Unavail: 901 seconds	Statistics spanning the first interval. The statistical items are the same as those provided by the statistics spanning the current interval.
Data in Interval 2: Line Code Violations: 0, Path Code Violations: 0 Ais Alarm: 0 seconds, Los Alarm: 900 seconds Slip: 23 seconds, Fr Loss: 900 seconds Line Err: 0 seconds, Degraded: 0 minutes Errored: 0 seconds, Bursty Err: 0 seconds Severely Err: 0 seconds, Unavail: 900 seconds	Statistics spanning the second interval. The statistical items are the same as those provided by the statistics spanning the current interval.
Total Data (last 2 15 minute intervals): Line Code Violations: 0, Path Code Violations: 0 Ais Alarm: 0 seconds, Los Alarm: 2087 seconds Slip: 52 seconds, Fr Loss: 2087 seconds Line Err: 0 seconds, Degraded: 0 minutes Errored: 0 seconds, Bursty Err: 0 seconds Severely Err: 0 seconds, Unavail: 2087 seconds	Statistics spanning the last two intervals. The statistical items are the same as those provided by the statistics spanning the current interval.

‌

Related commands

reset counters controller t1

fdl

Use fdl to set the behavior of the CT1 interface on the FDL in ESF framing.

Use undo fdl to restore the default.

Syntax

fdl { ansi | att | both | none }

undo fdl

Default

FDL in ESF framing is disabled (none).

Views

CT1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

ansi: Specifies ANSI T1.403 for facilities data link (FDL).

att: Specifies AT&T TR 54016 for FDL.

both: Specifies both ANSI T1.403 and AT&T TR 54016 for FDL.

none: Disables FDL.

Usage guidelines

Facility Data Link (FDL) is an embedded 4 kbps overhead channel within the ESF format for transmitting alarm information, performance statistics, or loopback code. FDL uses ANSI T1.403 and ATT TR 54016. You can change the setting depending on the setting at the far end.

Examples

# Implement AT&T FDL on T1 2/4/0.

<Sysname> system-view

[Sysname] controller t1 2/4/0

[Sysname-T1 2/4/0] fdl att

frame-format (CT1 interface)

Use frame-format to set the framing format on a CT1 interface.

Use undo frame-format to restore the default.

Syntax

frame-format { esf | sf }

undo frame-format

Default

The framing format on a CT1 interface is esf.

Views

CT1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

esf: Sets the framing format to extended super frame (ESF).

sf: Sets the framing format to super frame (SF).

Usage guidelines

CT1 interfaces support the following framing formats:

· ESF format—Allows you to test the system without affecting the ongoing service.

· SF format—Provides more significant bits for user data transmission because multiple frames can share the same FSC and signaling information.

Examples

# Set the framing format to SF for T1 2/4/0.

<Sysname> system-view

[Sysname] controller t1 2/4/0

[Sysname-T1 2/4/0] frame-format sf

idle-code (CT1 interface)

Use idle-code to set the line idle code on a CT1 interface.

Use undo idle-code to restore the default.

Syntax

Idle-code { 7e | ff }

undo idle-code

Default

The line idle code on a CT1 interface is 7e.

Views

CT1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

7e: Sets the line idle code to 7e (hexadecimal).

ff: Sets the line idle code to ff (hexadecimal).

Usage guidelines

The line idle code is sent in the timeslots that are not bundled into logical channels on the interface.

Examples

# Set the line idle code to 7e on T1 2/4/0.

<Sysname> system-view

[Sysname] controller t1 2/4/0

[Sysname-T1 2/4/0] idlecode 7e

itf (CT1 interface)

Use itf to set the type and the number of interframe filling tags on a CT1 interface.

Use undo itf to restore the default.

Syntax

itf { number number | type { 7e | ff } }

undo itf { number | type }

Default

On a CT1 interface, the interframe filling tag is 7e, and the number of interframe filling tags is 4.

Views

CT1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

number number: Sets the number of interframe filling tags, in the range of 0 to 14. An interframe filling tag is one byte in length.

type: Specifies the interframe filling tag type.

7e: Sets the interframe filling tag type to 7e (hexadecimal).

ff: Sets the interframe filling tag type to ff (hexadecimal).

Usage guidelines

Interframe filling tags are sent when no service data is sent on the timeslots that are bundled into logical channels on a CT1 interface.

Examples

# Set the type of interframe filling tag to ff on T1 2/4/0.

<Sysname> system-view

[Sysname] controller t1 2/4/0

[Sysname-T1 2/4/0] itf type ff

# Set the number of interframe filling tags to 5 on T1 2/4/0.

<Sysname> system-view

[Sysname] controller t1 2/4/0

[Sysname-T1 2/4/0] itf number 5

loopback (CT1 interface)

Use loopback to enable a type of loopback on a CT1 interface.

Use undo loopback to disable loopback on a CT1 interface.

Syntax

loopback { local | payload | remote }

undo loopback

Default

Loopback is disabled on a CT1 interface.

Views

CT1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

local: Enables local loopback.

payload: Enables external payload loopback.

remote: Enables remote loopback.

Usage guidelines

Loopback is intended for testing only. Disable the feature when the interface is operating correctly.

You can bundle timeslots on a CT1 interface to form a serial interface and encapsulate it with PPP. After you enable loopback on this serial interface, it is normal that the state of the link layer protocol is reported as down.

Examples

# Enable local loopback on T1 2/4/0.

<Sysname> system-view

[Sysname] controller t1 2/4/0

[Sysname-T1 2/4/0] loopback local

reset counters controller t1

Use reset counters controller t1 to clear CT1 interface statistics.

Syntax

reset counters controller t1 [ interface-number ]

Views

User view

Predefined user roles

network-admin

mdc-admin

Parameters

interface-number: Specifies a CT1 interface by its number. If you do not specify this argument, the command clears statistics for all CT1 interfaces.

Usage guidelines

The reset counters interface command clears statistics for all interfaces.

To display CT1 interface statistics, use the display controller t1 command.

Examples

# Clear statistics for the CT1 interface T1 2/4/0.

<Sysname> reset counters controller t1 2/4/0

Related commands

display controller t1

sendloopcode

Use sendloopcode to send remote loopback control code.

Syntax

sendloopcode { fdl-ansi-llb-down | fdl-ansi-llb-up | fdl-ansi-plb-down | fdl-ansi-plb-up | fdl-att-plb-down | fdl-att-plb-up | inband-llb-down | inband-llb-up }

Default

No remote loopback control code is sent.

Views

CT1 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

fdl-ansi-llb-down: Sends ANSI-compliant LLB deactivation request code in the FDL to remove remote loopback.

fdl-ansi-llb-up: Sends ANSI-compliant line loopback (LLB) activation request code in the FDL to start remote loopback.

fdl-ansi-plb-down: Sends ANSI-compliant PLB deactivation request code in the FDL to remove remote loopback.

fdl-ansi-plb-up: Sends ANSI-compliant payload loopback (PLB) activation request code in the FDL to start remote loopback.

fdl-att-plb-down: Sends AT&T-complaint PLB deactivation request code in the FDL to remove remote loopback.

fdl-att-plb-up: Sends AT&T-complaint PLB activation request code in the FDL to start remote loopback.

inband-llb-down: Sends in-band LLB deactivation request code in compliance with the ANSI or AT&T implementation to remove remote loopback.

inband-llb-up: Sends in-band line loopback (LLB) activation request code compliant with the ANSI and AT&T implementation to start remote loopback.

Usage guidelines

You can configure loopback on the remote CT1 interface by sending loopback request code. Before you configure this command, make sure the remote CT1 interface can automatically receive the loopback control code.

In LLB mode, all 193 bits (one synchronization bit and 192 effective payload bits) in a T1 PCM frame are looped back. In PLB mode, only 192 effective payload bits are looped back.

The format of loopback code is compliant with ANSI T1.403 or AT&T TR 54016.

In SF framing, LLB code is sent using the effective bandwidth. In ESF framing, both LLB code and PLB code are sent and received in the FDL.

Use this command in conjunction with the far-end T1 device. The far-end device must be able to set loopback mode depending on the detected loopback code. The sending of remote loopback control code lasts 5 seconds without affecting the operation of other interfaces.

Examples

# Send in-band LLB activation request code.

<Sysname> system-view

[Sysname] controller t1 2/4/0

[Sysname-T1 2/4/0] sendloopcode inband-llb-up

E1-F interface commands

clock-change auto

Use clock-change auto to enable automatic clock mode switchover on an E1-F interface.

Use undo clock-change auto to disable the automatic clock mode switchover on an E1-F interface.

Syntax

clock-change auto

undo clock-change auto

Default

Automatic clock mode switchover is disabled on an E1-F interface.

Views

E1-F interface view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

When automatic clock mode switchover is enabled, the interface automatically switches to the master clock mode when both of the following conditions exist:

· The interface uses the slave clock mode.

· The interface receives an alarm indication signal (AIS), loss of signal (LOS), or loss of frame (LOF) alarm.

After the alarm is cleared, the interface automatically switches back to the slave clock mode.

When automatic clock mode switchover is disabled, the interface uses the user-configured clock mode.

Examples

# Enable automatic clock mode switchover for the E1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] clock-change auto

Related commands

fe1 clock

crc

Use crc to configure CRC mode for an E1-F interface.

Use undo crc to restore the default.

Syntax

crc { 16 | 32 | none }

undo crc

Default

The CRC mode for an E1-F interface is 16-bit CRC.

Views

E1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

16: Specifies 16-bit CRC.

32: Specifies 32-bit CRC.

none: Disables CRC.

Examples

# Specify 32-bit CRC on the E1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] crc 32

display fe1

Use display fe1 to display information about E1-F interfaces.

Syntax

display fe1 [ serial interface-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

serial interface-number: Specifies an E1-F interface by its number. If you do not specify an interface, this command displays information about all E1-F interfaces.

Usage guidelines

If the specified interface is a common serial interface rather than an E1-F interface, the system displays a prompt.

Examples

# Display information about the E1-F interface Serial 2/1/0.

<Sysname> display fe1 serial 2/1/0

Serial2/1/0

Basic Configuration:

Work mode: E1 framed, Cable type: 75 Ohm unbalanced

Frame format: no-crc4

Line code: hdb3, Source clock: slave

Idle code: 7e, Itf type: 7e, Itf number: 4

Loopback: not set

Alarm State:

Receiver alarm state is None.

Transmitter is sending remote alarm.

Historical Statistics:

Data in current interval (19349 seconds elapsed):

Loss Frame Alignment: 129 seconds, Framing Error: 0 seconds

CRC Error: 0 seconds, Alarm Indication: 0 seconds

Loss-of-signals: 129 seconds, Code Violations: 0 seconds

Slip: 0 seconds, E-Bit Error: 0 seconds

Table 6 Command output

Field	Description
Cable type	Cable type of the interface (75 ohm unbalanced or 120 ohm balanced).
Frame-format	Framing format: CRC4 or no-CRC4.
Line Code	Line code format: AMI or HDB3.
Source clock	Clock source used by the interface: master or slave.
Idle code	Idle code: 7e or ff.
Itf type	Interframe filling tag: 7e or ff.
Itf number	Number of interframe filling tags.
Loopback	Whether loopback is configured on the interface.
Data in current interval (19349 seconds elapsed): Loss Frame Alignment: 129 seconds, Framing Error: 0 seconds CRC Error: 0 seconds, Alarm Indication: 0 seconds Loss-of-signals: 129 seconds, Code Violations: 0 seconds Slip: 0 seconds, E-Bit Error: 0 seconds	Time duration that each error lasts within the interval. The errors include frame misalignment, frame errors, alarms, loss of signals, code violation, and frame slipping.

‌

fe1 alarm-detect

Use fe1 alarm-detect to enable RAI detection on an E1-F interface.

Use undo fe1 alarm-detect to disable RAI detection on an E1-F interface.

Syntax

fe1 alarm-detect rai

undo fe1 alarm-detect rai

Default

RAI detection is enabled on an E1-F interface.

Views

E1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

rai: Remote Alarm Indication (RAI).

Usage guidelines

This command is applicable when the interface operates in framed mode.

Examples

# Disable RAI detection on Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] undo fe1 alarm-detect rai

Related commands

fe1 unframed

fe1 cable

Use fe1 cable to set the cable length for an E1-F interface.

Use undo fe1 cable to restore the default.

Syntax

fe1 cable { long | short }

undo fe1 cable

Default

The long keyword applies.

Views

E1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

long: Supports long cables.

short: Supports short cables.

Examples

# Set the cable length type to short on the E1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] fe1 cable short

fe1 clock

Use fe1 clock to set the clock mode of an E1-F interface.

Use undo fe1 clock to restore the default.

Syntax

fe1 clock { master | slave }

undo fe1 clock

Default

The clock mode for an E1-F interface is slave.

Views

E1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

master: Sets the clock mode to master.

slave: Sets the clock mode to slave.

Usage guidelines

When the clock mode of an E1-F interface is master, it uses the internal clock source. When the clock mode of an E1-F interface is slave, it uses the line clock source.

Set the clock mode for an E1-F interface as follows:

· When the E1-F interface is operating in DCE mode, set its clock mode to master.

· When the E1-F interface is operating in DTE mode, set its clock mode to slave.

Examples

# Set the clock mode to master for the E1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] fe1 clock master

Related commands

clock-change auto

fe1 code

Use fe1 code to set the line code format for an E1-F interface.

Use undo fe1 code to restore the default.

Syntax

fe1 code { ami | hdb3 }

undo fe1 code

Default

The line code format is HDB3 for the E1-F interface.

Views

E1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

ami: Specifies the AMI line code format.

hdb3: Specifies the HDB3 line code format.

Usage guidelines

An E1-F interface must use the same line code format as its remote end. For the interface to operate correctly, configure the fe1 data-coding inverted command if the AMI format is used.

Examples

# Set the line code format to AMI for the E1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] fe1 code ami

Related commands

fe1 data-coding

Use fe1 data-coding to enable or disable user data inversion for an E1-F interface.

Use undo fe1 data-coding to restore the default.

Syntax

fe1 data-coding { inverted | normal }

undo fe1 data-coding

Default

User data inversion is disabled for an E1-F interface.

Views

E1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

inverted: Enables user data inversion.

normal: Disables user data inversion.

Usage guidelines

When AMI encoding is used on an E1-F interface, data inversion eliminates the presence of multiple consecutive zeros.

The data inversion setting must be the same at the two ends of an E1-F line.

Examples

# Enable user data inversion on the E1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] fe1 data-coding inverted

Related commands

fe1 code

fe1 detect-ais

Use fe1 detect-ais to enable AIS detection on an E1-F interface.

Use undo fe1 detect-ais to disable AIS detection on an E1-F interface.

Syntax

fe1 detect-ais

undo fe1 detect-ais

Default

AIS detection is enabled on an E1-F interface.

Views

E1-F interface view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

This command is available when the E1-F interface is operating in unframed mode.

Examples

# Enable AIS detection on the E1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] fe1 detect-ais

Related commands

fe1 unframed

fe1 frame-format

Use fe1 frame-format to set the framing format for an E1-F interface.

Use undo fe1 frame-format to restore the default.

Syntax

fe1 frame-format { crc4 | no-crc4 }

undo fe1 frame-format

Default

The framing format of an E1-F interface is no-CRC4.

Views

E1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

crc4: Sets framing format to CRC4.

no-crc4: Sets framing format to no-CRC4.

Usage guidelines

An E1-F interface in framed mode supports both CRC4 and no-CRC4 framing formats. Only CRC4 supports four-bit CRC on physical frames.

Examples

# Set the framing format to crc4 for the E1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] fe1 frame-format crc4

Related commands

fe1 unframed

fe1 idle-code

Use fe1 idle-code to set the line idle code on an E1-F interface.

Use undo fe1 idle-code to restore the default.

Syntax

fe1 idle-code { 7e | ff }

undo fe1 idle-code

Default

The line idle code on an E1-F interface is 7e.

Views

E1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

7e: Sets the line idle code to 7e (hexadecimal).

ff: Sets the line idle code to ff (hexadecimal).

Usage guidelines

The line idle code is sent in the timeslots that are not bundled into logical channels on the interface.

Examples

# Set the line idle code to 7e on the E1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] fe1 idlecode 7e

fe1 itf

Use fe1 itf to set the type and number of interframe filling tags on an E1-F interface.

Use undo fe1 itf to restore the default.

Syntax

fe1 itf { number number | type { 7e | ff } }

undo fe1 itf { number | type }

Default

On an E1-F interface, the interframe filling tag is 7e, and the number of interframe filling tags is 4.

Views

E1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

number number: Sets the number of interframe filling tags, in the range of 0 to 14. An interframe filling tag is one byte in length.

type: Specifies the type of interframe filling tag type.

7e: Sets the interframe filling tag type to 7e (hexadecimal).

ff: Sets the interframe filling tag type to ff (hexadecimal).

Usage guidelines

The bundled timeslots on the E1-F interface send interframe filling tags when no service data is present.

Examples

# Set the type of interframe filling tag to ff on the E1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] fe1 itf type ff

# Set the number of interframe filling tags to 5 on the E1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] fe1 itf number 5

fe1 loopback

Use fe1 loopback to enable a type of loopback on an E1-F interface.

Use undo fe1 loopback to disable loopback on an E1-F interface.

Syntax

fe1 loopback { local | payload | remote }

undo fe1 loopback

Default

Loopback is disabled on an E1-F interface.

Views

E1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

local: Enables internal loopback.

payload: Enables external payload loopback.

remote: Enables external loopback.

Usage guidelines

Loopback is intended for testing only. Disable the feature when the interface is operating correctly.

The three loopback modes cannot be used simultaneously on an E1-F interface.

Examples

# Enables internal loopback on the E1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] fe1 loopback local

fe1 timeslot-list

Use fe1 timeslot-list to bundle timeslots on an E1-F interface.

Use undo fe1 timeslot-list to restore the default.

Syntax

fe1 timeslot-list list

undo fe1 timeslot-list

Default

All the timeslots on an E1-F interface are bundled to form a 1984 kbps interface.

Views

E1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

Usage guidelines

Timeslot bundling results in interface rate change. For example, if you bundle timeslots 1 through 10, the interface rate is 10 × 64 kbps.

You can create only one channel set on an E1-F interface. For the channel set, the system creates one synchronous serial interface. The number of the serial interface is identical to the number of the E1-F interface.

On a CE1 interface, you can create multiple channel sets. For each set, the system automatically creates a synchronous serial interface.

Timeslot 0 on E1-F interfaces is used for transmitting synchronization information. A bundling operation only involves timeslots 1 through 31.

When the E1-F interface is operating in unframed mode, the fe1 timeslot-list command is invalid.

Examples

# Bundle timeslots 1, 2, 5, 10 through 15, and 18 on the E1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] fe1 timeslot-list 1,2,5,10-15,18

Related commands

fe1 unframed

Use fe1 unframed to configure an E1-F interface to operate in unframed mode.

Use undo fe1 unframed to restore the default.

Syntax

fe1 unframed

undo fe1 unframed

Default

An E1-F interface operates in framed mode.

Views

E1-F interface view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

In unframed mode, an E1-F interface is a 2048 kbps interface without timeslot division and has the same logical features as a standard synchronous serial interface.

In framed mode, an E1-F interface is physically divided into 32 timeslots numbered 0 through 31, with timeslot 0 for synchronization.

Examples

# Set the E1-F interface Serial 2/1/0 to operate in unframed mode.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] fe1 unframed

Related commands

fe1 timeslot-list

reset counters interface serial

Use reset counters interface serial to clear serial interface statistics.

Syntax

reset counters interface serial [ interface-number ]

Views

User view

Predefined user roles

network-admin

mdc-admin

Parameters

Usage guidelines

Use this command to clear history statistics before you collect traffic statistics for a time period.

Examples

# Clear statistics for Serial 2/1/0.

<Sysname> reset counters interface serial 2/1/0

T1-F interface commands

crc

Use crc to configure the CRC mode on a T1-F interface.

Use undo crc to restore the default.

Syntax

crc { 16 | 32 | none }

undo crc

Default

The CRC mode is 16-bit CRC.

Views

T1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

16: Specifies 16 bit CRC.

32: Specifies 32 bit CRC.

none: Disables CRC.

Examples

# Specify 32-bit CRC on the T1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] crc 32

display ft1

Use display ft1 to display information about a T1-F interface.

Syntax

display ft1 [ serial interface-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

serial interface-number: Specifies a T1-F interface by its number. If you do not specify an interface, this command displays information about all T1-F interfaces.

Usage guidelines

If the specified interface is a common serial interface rather than a T1-F interface, the system displays a prompt.

Examples

# Display information about the T1-F interface Serial 2/1/0.

<Sysname> display ft1 serial 2/1/0

Serial2/1/0

Basic Configuration:

Work mode: T1 framed, Cable type: 100 Ohm balanced

Frame-format: esf, fdl: none, Line code: b8zs

Source clock: slave, Data-coding: normal

Idle code: ff, Itf type: ff, Itf number: 2

Loopback: not set

Alarm State:

Receiver alarm state is Loss-of-Signal.

Transmitter is sending remote alarm.

Pulse density violation detected.

SendLoopCode History:

Inband-llb-up: 0 times, Inband-llb-down: 0 times

Fdl-ansi-llb-up: 0 times, Fdl-ansi-llb-down: 0 times

Fdl-ansi-plb-up: 0 times, Fdl-ansi-plb-down: 0 times

Fdl-att-plb-up: 0 times, Fdl-att-plb-down: 0 times

BERT state:(stopped, not completed)

Test pattern: 2^15, Status: Not Sync, Sync Detected: 0

Time: 0 minutes, Time past: 0 minutes

Bit Errors (since test started): 0 bits

Bits Received (since test started): 0 Kbits

Bit Errors (since latest sync): 0 bits

Bits Received (since latest sync): 0 Kbits

Historical Statistics:

Data in current interval (285 seconds elapsed):

Line Code Violations: 0, Path Code Violations: 0

Ais Alarm: 0 seconds, Los Alarm: 286 seconds

Slip: 7 seconds, Fr Loss: 286 seconds

Line Err: 0 seconds, Degraded: 0 minutes

Errored: 0 seconds, Bursty Err: 0 seconds

Severely Err: 0 seconds, Unavail: 286 seconds

Data in Interval 1:

Line Code Violations: 0, Path Code Violations: 0

Ais Alarm: 0 seconds, Los Alarm: 901 seconds

Slip: 22 seconds, Fr Loss: 901 seconds

Line Err: 0 seconds, Degraded: 0 minutes

Errored: 0 seconds, Bursty Err: 0 seconds

Severely Err: 0 seconds, Unavail: 901 seconds

Data in Interval 2:

Line Code Violations: 0, Path Code Violations: 0

Ais Alarm: 0 seconds, Los Alarm: 900 seconds

Slip: 23 seconds, Fr Loss: 900 seconds

Line Err: 0 seconds, Degraded: 0 minutes

Errored: 0 seconds, Bursty Err: 0 seconds

Severely Err: 0 seconds, Unavail: 900 seconds

Total Data (last 2 15 minute intervals):

Line Code Violations: 0, Path Code Violations: 0

Ais Alarm: 0 seconds, Los Alarm: 2087 seconds

Slip: 52 seconds, Fr Loss: 2087 seconds

Line Err: 0 seconds, Degraded: 0 minutes

Errored: 0 seconds, Bursty Err: 0 seconds

Severely Err: 0 seconds, Unavail: 2087 seconds

Table 7 Command output

Field	Description
Basic Configuration	Basic configurations for the interface.
Work mode	T1 interface operating mode: T1 or CT1.
Cable type	Cable type of the interface, 100 ohm balanced in this sample output.
Frame-format	Frame format configured on the interface: ESF or SF.
fdl	FDL format: ANSI, ATT, or none.
Line code	AMI or B8ZS.
Source clock	Clock source used by the interface: master or slave.
Data-coding	Normal or inverted.
Idle code	Idle code: 7e or ff.
Itf type	Type of inter-frame filling tags: 7e or ff.
Itf number	Number of inter-frame filling tags.
Loop back	Loopback setting on the interface: local, payload, remote, or not set.
Receiver alarm state is Loss-of-Signal	Type of received alarm: none, LOS, LOF, RAI, or AIS.
Transmitter is sending remote alarm	Type of transmitted alarm: RAI or none.
Pulse density violation detected	The detected pulse density is incompliant with the specification.
SendLoopCode History: Inband-llb-up: 0 times, Inband-llb-down: 0 times Fdl-ansi-llb-up: 0 times, Fdl-ansi-llb-down: 0 times Fdl-ansi-plb-up: 0 times, Fdl-ansi-plb-down: 0 times Fdl-att-plb-up: 0 times, Fdl-att-plb-down: 0 times	History of loopback code sending to the far-end, including the number of transmissions for each type of code, and the type of the last sent code. (For more information, see "ft1 sendloopcode.")
BERT state	BERT test state: · completed—The test has been completed. · stopped—The test has been manually terminated. · running—The test is running.
Test pattern	Test pattern in use: 2^15 or 2^20.
Status	Whether the interface is being synchronized: · Sync—The interface is being synchronized. · Not Sync—The interface is not being synchronized.
Sync Detected	Number of detected synchronizations.
Time	Duration of the BERT test.
Time past	Time that has elapsed.
Bit Errors (since test started)	Number of bit errors received since the start of the BERT test.
Bits Received (since test started)	Number of bits received since the start of the BERT test.
Bit Errors (since latest sync)	Number of bit errors received since the last synchronization.
Bits Received (since latest sync)	Number of bits received since the last synchronization.
Historical Statistics:	Historical statistics for the interface.
Last link flapping	The amount of time that has elapsed since the most recent physical state change of the interface. This field displays Never if the interface has been physically down since device startup.
Last clearing of counters	The most recent time that the reset counters interface serial command was executed. This field displays Never if this command has not been executed since the device startup.
Data in current interval (285 seconds elapsed): Line Code Violations: 0, Path Code Violations: 0 Ais Alarm: 0 seconds, Los Alarm: 286 seconds Slip: 7 seconds, Fr Loss: 286 seconds Line Err: 0 seconds, Degraded: 0 minutes Errored: 0 seconds, Bursty Err: 0 seconds Severely Err: 0 seconds, Unavail: 286 seconds	Statistics spanning the current interval. The statistical items, such as AIS alarm, LOS signal, and LFA, are provided according to the T1 specifications for the physical layer. For more information, see ANSI T1.403 and AT&T TR 54016.
Data in Interval 1: Line Code Violations: 0, Path Code Violations: 0 Ais Alarm: 0 seconds, Los Alarm: 901 seconds Slip: 22 seconds, Fr Loss: 901 seconds Line Err: 0 seconds, Degraded: 0 minutes Errored: 0 seconds, Bursty Err: 0 seconds Severely Err: 0 seconds, Unavail: 901 seconds	Statistics spanning the first interval. The statistical items are the same as those provided by the statistics spanning the current interval.
Data in Interval 2: Line Code Violations: 0, Path Code Violations: 0 Ais Alarm: 0 seconds, Los Alarm: 900 seconds Slip: 23 seconds, Fr Loss: 900 seconds Line Err: 0 seconds, Degraded: 0 minutes Errored: 0 seconds, Bursty Err: 0 seconds Severely Err: 0 seconds, Unavail: 900 seconds	Statistics spanning the second interval. The statistical items are the same as those provided by the statistics spanning the current interval.
Total Data (last 2 15 minute intervals): Line Code Violations: 0, Path Code Violations: 0 Ais Alarm: 0 seconds, Los Alarm: 2087 seconds Slip: 52 seconds, Fr Loss: 2087 seconds Line Err: 0 seconds, Degraded: 0 minutes Errored: 0 seconds, Bursty Err: 0 seconds Severely Err: 0 seconds, Unavail: 2087 seconds	Statistics spanning the last two intervals. The statistical items are the same as those provided by the statistics spanning the current interval.

‌

ft1 alarm-detect

Use ft1 alarm-detect to enable RAI detection on an interface.

Use undo ft1 alarm-detect to disable RAI detection on an interface.

Syntax

ft1 alarm-detect rai

undo ft1 alarm-detect rai

Default

RAI detection is enabled on an interface.

Views

T1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

rai: Remote Alarm Indication (RAI).

Usage guidelines

This command is applicable when the framing format on the interface is ESF.

Examples

# Disable RAI detection on Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] undo ft1 alarm-detect rai

Related commands

ft1 frame-format

ft1 alarm-threshold

Use ft1 alarm-threshold to set LOS, AIS, or LFA alarm thresholds on a T1-F interface.

Use undo ft1 alarm-threshold to restore the default.

Syntax

ft1 alarm-threshold { ais { level-1 | level-2 } | lfa { level-1 | level-2 | level-3 | level-4 } | los { pulse-detection | pulse-recovery } value }

undo ft1 alarm-threshold { ais | lfa | los { pulse-detection | pulse-recovery } }

Default

For AIS and LFA, the alarm threshold is level-1.

For LOS, the value of pulse-detection is 176 and the value of pulse-recovery is 22. A LOS alarm is generated if the number of pulses detected within 176 pulse intervals is less than 22.

Views

T1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

ais: Specifies an AIS alarm.

· level-1: Specifies the condition when the number of zeros in the bit stream of an SF or ESF frame is less than or equal to 2.

· level-2: Specifies one of the following conditions:

¡ In an SF frame, the number of zeros is less than or equal to 3 in the bit stream.

¡ In an ESP frame, the number of zeros is less than or equal to 5 in the bit stream.

lfa: Specifies an LFA alarm.

· level-1: Specifies the condition when two of four frame alignment bits are lost.

· level-2: Specifies the condition when two of five frame alignment bits are lost.

· level-3: Specifies the condition when two of six frame alignment bits are lost.

· level-4: Specifies the condition when errors are detected in four consecutive ESF frames. This keyword is available only for ESF frames.

los: Specifies a LOS alarm.

· pulse-detection: Specifies the pulse detection duration threshold of the LOS alarm, in units of pulse intervals.

· pulse-recovery: Specifies the pulse threshold of the LOS alarm.

value: Specifies the value of the pulse-detection threshold or pulse-recovery threshold.

· For the pulse-detection threshold, this argument is in the range of 16 to 4096.

· For the pulse-recovery threshold, this argument is in the range of 1 to 256.

If the number of the pulses detected during the total length of the specified pulse detection intervals is smaller than the pulse-recovery threshold, a LOS alarm occurs. For example, if the two thresholds take their defaults, a LOS alarm is generated if the number of pulses detected within 176 pulse intervals is less than 22.

Examples

# Set the number of detection intervals to 300 for the pulse detection duration threshold.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] ft1 alarm-threshold los pulse-detection 300

Related commands

ft1 frame-format

ft1 bert

Use ft1 bert to start a BERT test on a T1-F interface.

Use undo ft1 bert to stop the BERT test running on a T1-F interface.

Syntax

ft1 bert pattern { 2^20 | 2^15 } time minutes [ unframed ]

undo ft1 bert

Default

No BERT test is performed on a T1-F interface.

Views

T1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

pattern: Sets a BERT pattern.

· 2^15: Specifies the pattern length (in bits) as two to the fifteenth power.

· 2^20: Specifies the pattern length (in bits) as two to the twentieth power.

time minutes: Sets the duration (in minutes) of a BERT test. The minutes argument is in the range of 1 to 1440.

unframed: Sets the test pattern to cover the overhead bits of the frame.

Usage guidelines

The T1-F interface supports only the 2^15 and 2^20 BERT patterns defined in ITU O.151, ITU O.153, and ANSI T1.403-1999.

To display the state and result of a BERT test, use the display ft1 command.

Examples

# Run a 10-minute 2^20 BERT test on the T1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] ft1 bert pattern 2^20 time 10

Related commands

display ft1

ft1 cable

Use ft1 cable to set the cable attenuation and length on a T1-F interface.

Use undo ft1 cable to restore the default.

Syntax

ft1 cable { long decibel | short length }

undo ft1 cable

Default

The cable attenuation length on a T1-F interface is long 0db.

Views

T1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

long decibel: Matches 199.6-meter (655-feet) and longer cable length. The decibel argument can be 0db, -7.5db, -15db, or -22.5db, depending on the signal quality at the receiving end. No external CSU is required.

short length: Matches a cable length shorter than 199.6 meters (655 feet). The length argument can be 133ft, 266ft, 399ft, 533ft, or 655ft, depending on the actual transmission distance.

Usage guidelines

You can use this command to adapt the signal waveform to different transmission conditions such as the quality of the signal received by the receiver. If signal quality is good, use the default setting.

Examples

# Set the cable length to 133 feet (40.5 meters) on the T1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] ft1 cable short 133ft

Related commands

ft1 frame-format

ft1 clock

Use ft1 clock to set the clock mode of a T1-F interface.

Use undo ft1 clock to restore the default.

Syntax

ft1 clock { master | slave }

undo ft1 clock

Default

The clock mode of a T1-F interface is slave.

Views

T1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

master: Sets the clock mode to master.

slave: Sets the clock mode to slave.

Usage guidelines

When the clock mode of a T1-F interface is master, it uses the internal clock source. When the clock mode of a T1-F interface is slave, it uses the line clock source.

Set the clock mode for a T1-F interface as follows:

· When the T1-F interface is operating in DCE mode, set its clock mode to master.

· When the T1-F interface is operating in DTE mode, set its clock mode to slave.

· When two T1-F interfaces on two routers are directly connected, configure the two ends with different clock modes.

· When the T1-F interface on a router is connected to a switch, the T1-F interface on the router operates as a DTE. The switch operates as a DCE. Set the clock mode to slave for the T1-F interface on the router to accept the clock provided by the switch.

Examples

# Set the clock mode to master on the T1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] ft1 clock master

ft1 code

Use ft1 code to set the line code format for a T1-F interface.

Use undo ft1 code to restore the default.

Syntax

ft1 code { ami | b8zs }

undo ft1 code

Default

The line code format is B8ZS for the T1-F interface.

Views

T1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

ami: Specifies the AMI line code format.

b8zs: Specifies the B8ZS line code format.

Usage guidelines

A T1-F interface must use the same line code format as its remote end. For the interface to operate correctly, configure the ft1 data-coding inverted command if the AMI format is used.

Examples

# Set the line code format to AMI for the T1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] ft1 code ami

Related commands

ft1 data-coding

Use ft1 data-coding to enable or disable user data inversion for a T1-F interface.

Use undo ft1 data-coding to restore the default.

Syntax

ft1 data-coding { inverted | normal }

undo ft1 data-coding

Default

Data inversion is disabled for a T1-F interface.

Views

T1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

inverted: Enables user data inversion.

normal: Disables user data inversion.

Usage guidelines

To prevent the string 7e in valid data from being used as paddings, HDLC inserts a zero after every five consecutive ones in the data stream. In data inversion, each bit one is inverted to bit zero, and each bit zero is inverted to bit one. After the inversion, at least a bit one is present in every eight consecutive bits.

When AMI encoding is used on a T1-F interface, data inversion eliminates the presence of multiple consecutive zeros.

At the two ends of a T1-F line, the data inversion settings must be the same.

Examples

# Enable user data inversion on the T1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] ft1 data-coding inverted

Related commands

ft1 code

ft1 fdl

Use ft1 fdl to set the behavior of a T1-F interface on the FDL in ESF framing.

Use undo ft1 fdl to restore the default.

Syntax

ft1 fdl { ansi | att | both | none }

undo ft1 fdl

Default

FDL is disabled (none).

Views

T1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

ansi: Specifies ANSI T1.403 for FDL.

att: Specifies AT&T TR 54016 for FDL.

both: Specifies both ANSI T1.403 and AT&T TR 54016 for FDL.

none: Disables FDL.

Usage guidelines

FDL is an embedded 4 kbps overhead channel within the ESF format for transmitting performance statistics or loopback code.

You can change the setting depending on the setting at the far end.

Examples

# Set ANSI FDL on the T1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] ft1 fdl ansi

Related commands

ft1 frame-format

Use ft1 frame-format to set the framing format for a T1-F interface.

Use undo ft1 frame-format to restore the default.

Syntax

ft1 frame-format { esf | sf }

undo ft1 frame-format

Default

The framing format on a T1-F interface is esf.

Views

T1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

esf: Sets the framing format to ESF.

sf: Sets the framing format to SF.

Usage guidelines

T1-F interfaces support the following framing formats:

· ESF format—Allows you to test the system without affecting the ongoing service.

· SF format—Provides more significant bits for user data transmission because multiple frames can share the same FSC and signaling information.

Examples

# Set the framing format to SF for the T1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] ft1 frame-format sf

Related commands

ft1 fdl

ft1 idle-code

Use ft1 idle-code to set the line idle code on a T1-F interface.

Use undo ft1 idle-code to restore the default.

Syntax

ft1 idle-code { 7e | ff }

undo ft1 idle-code

Default

The line idle code on a T1-F interface is 7e.

Views

T1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

7e: Sets the line idle code to 7e (hexadecimal).

ff: Sets the line idle code to ff (hexadecimal).

Usage guidelines

The line idle code is sent in the timeslots that are not bundled into logical channels on the interface.

Examples

# Set the line idle code to 7e on the T1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] ft1 idlecode 7e

ft1 itf

Use ft1 itf to set the type and the number of interframe filling tags on a T1-F interface.

Use undo ft1 itf to restore the default.

Syntax

ft1 itf { number number | type { 7e | ff } }

undo ft1 itf { number | type }

Default

On a T1-F interface, the interframe filling tag is 7e, and the number of interframe filling tags is 4.

Views

T1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

number number: Sets the number of interframe filling tags, in the range of 0 to 14. An interframe filling tag is one byte in length.

type: Specifies the interframe filling tag type.

7e: Sets the interframe filling tag type to 7e (hexadecimal).

ff: Sets the interframe filling tag type to ff (hexadecimal).

Usage guidelines

Interframe filling tags are sent when no service data is sent on the timeslots bundled into logical channels on a T1-F interface.

Do not use the ft1 itf type ff command if both the ft1 code ami command and the ft1 data-coding inverted command are configured. Otherwise, the T1-F interface will not operate correctly.

Examples

# Set the type of interframe filling tag to ff on the T1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] ft1 itf type ff

# Set the number of interframe filling tags to 5 on the T1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] ft1 itf number 5

Related commands

ft1 code

ft1 data-coding

ft1 loopback

Use ft1 loopback to enable a type of loopback on a T1-F interface.

Use undo ft1 loopback to disable loopback on a T1-F interface.

Syntax

ft1 loopback { local | payload | remote }

undo ft1 loopback

Default

Loopback is disabled on a T1-F interface.

Views

T1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

local: Enables internal loopback.

payload: Enables external payload loopback.

remote: Enables external loopback.

Usage guidelines

Loopback is intended for testing only. Disable the feature when the interface is operating correctly.

The three loopback modes cannot be used simultaneously on a T1-F interface.

Examples

# Enable local loopback on the T1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] ft1 loopback local

ft1 sendloopcode

Use ft1 sendloopcode to send remote loopback control code.

Syntax

ft1 sendloopcode { fdl-ansi-llb-down | fdl-ansi-llb-up | fdl-ansi-plb-down | fdl-ansi-plb-up | fdl-att-plb-down | fdl-att-plb-up | inband-llb-down | inband-llb-up }

Default

No remote loopback control code is sent.

Views

T1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

fdl-ansi-llb-down: Sends ANSI-compliant LLB deactivation request code in the FDL to remove the remote loopback.

fdl-ansi-llb-up: Sends ANSI-compliant line loopback (LLB) activation request code in the FDL to start remote loopback.

fdl-ansi-plb-down: Sends ANSI-compliant PLB deactivation request code in the FDL to remove the remote loopback.

fdl-ansi-plb-up: Sends ANSI-compliant payload loopback (PLB) activation request code in the FDL to start remote loopback.

fdl-att-plb-down: Sends AT&T-complaint PLB deactivation request code in the FDL to remove the remote loopback.

fdl-att-plb-up: Sends AT&T-complaint PLB activation request code in the FDL to start the remote loopback.

inband-llb-down: Sends in-band LLB deactivation request code compliant with the ANSI or AT&T implementation to remove the remote loopback.

inband-llb-up: Sends in-band line loopback (LLB) activation request code compliant with the ANSI or AT&T implementation to start the remote loopback.

Usage guidelines

You can configure loopback on the remote T1-F interface by sending a loopback request code.

In LLB mode, all 193 bits (one synchronization bit and 192 effective payload bits) in a T1 PCM frame are looped back. In PLB mode, only 192 effective payload bits are looped back.

The format of the loopback code is compliant with ANSI T1.403 or AT&T TR 54016.

In SF framing, LLB code is sent using the effective bandwidth (timeslots 1 through 24). In ESF framing, both LLB code and PLB code are sent and received in the FDL in ESF frames.

You can use this command only when the remote T1-F interface can automatically detect loopback request code from the network.

Examples

# Send in-band LLB activation request code.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] ft1 sendloopcode inband-llb-up

Related commands

ft1 frame-format

ft1 timeslot-list

Use ft1 timeslot-list to bundle timeslots on a T1-F interface.

Use undo ft1 timeslot-list to restore the default.

Syntax

ft1 timeslot-list list [ speed { 56k | 64k } ]

undo ft1 timeslot-list

Default

All the timeslots on the T1-F interface are bundled to form a 1536 kbps interface.

Views

T1-F interface view

Predefined user roles

network-admin

mdc-admin

Parameters

speed { 56k | 64k }: Time slot bundling speed in kbps. If 56k applies, timeslots are bundled into an n × 56 kbps bundle. If 64k (the default) applies, timeslots are bundled into an n × 64 kbps bundle.

Usage guidelines

Timeslot bundling results in interface rate change. For example, if you bundle timeslots 1 through 10, the interface rate is 10 × 64 kbps or 10 × 56 kbps.

You can create only one channel set on a T1-F interface. For the channel set, the system creates one synchronous serial interface. The number of the serial interface is identical to the number of the T1-F interface.

On a CT1 interface, you can create multiple channel sets. For each set, the system automatically creates a synchronous serial interface.

Examples

# Bundle timeslots 1, 2, 5, 10 through 15, and 18 on the T1-F interface Serial 2/1/0.

<Sysname> system-view

[Sysname] interface serial 2/1/0

[Sysname-Serial2/1/0] ft1 timeslot-list 1,2,5,10-15,18

reset counters interface serial

Use reset counters interface serial to clear serial interface statistics.

Syntax

reset counters interface serial [ interface-number ]

Views

User view

Predefined user roles

network-admin

mdc-admin

Parameters

Usage guidelines

Use this command to clear history statistics before you collect traffic statistics for a time period.

Examples

# Clear statistics for Serial 2/1/0.

<Sysname> reset counters interface serial 1/0

CT3 interface commands

alarm

Use alarm to enable a CT3 interface to detect/send alarm signals.

Use undo alarm to remove the alarm signal detection/sending setting.

Syntax

alarm { detect | generate { ais | febe | idle | rai } }

undo alarm { detect | generate { ais | febe | idle | rai } }

Default

Periodic alarm detection is enabled.

Default

Alarm signal sending is disabled.

Views

CT3 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

detect: Enables periodical alarm signal detection.

generate: Sends alarm signals for line state test.

· ais: Alarm indication signal.

· febe: Far end block error signal.

· idle: Idle signal.

· rai: Remote alarm indication signal.

Usage guidelines

At startup, periodical alarm signal detection is enabled on the CT3 interface. When the interface detects LOS, LOF, or AIS signals, it sends RAI signals to its peer.

The supported alarm signals (LOS, LOF, AIS, RAI, FEBE, and idle) are ANSI T1.107-1995 compliant.

You can configure the CT3 interface to send a type of alarm signal. To send another type of signal, you must first remove the previous setting by using the undo alarm command. If a RAI signal is present because an LOS, LOF, or AIS alarm is detected, you must first use the undo alarm detect command to remove the signal.

To display the real-time alarm state on the CT3 interface, use the display controller t3 command.

Examples

# Enable periodical alarm signal detection on CT3 interface T3 2/4/0.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] alarm detect

# Enable CT3 interface T3 2/4/0 to send AIS alarm signals.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] alarm generate ais

Related commands

display controller t3

cable

Use cable to configure the cable length on a CT3 interface.

Use undo cable to restore the default.

Syntax

cable feet

undo cable

Default

The cable length on a CT3 interface is 49 feet (14.9 meters).

Views

CT3 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

feet: Cable length in the range of 0 to 450 feet (0 to 137.2 meters).

Usage guidelines

The cable length in this command refers to the distance between the router and the cable distribution rack.

Examples

# Set the cable length to 50 feet (15.24 meters) on T3 2/4/0.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] cable 50

clock

Use clock to set the clock mode of a CT3 interface.

Use undo clock to restore the default.

Syntax

clock { master | slave }

undo clock

Default

The clock mode for a CT3 interface is slave.

Views

CT3 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

master: Sets the clock mode to master.

slave: Sets the clock mode to slave.

Usage guidelines

When the clock mode of a CT3 interface is master, it uses the internal clock source. When the clock mode of a CT3 interface is slave, it uses the line clock source.

When connected to a transmission device, the CT3 interface must use the slave clock. The clock provided by the transmission device is more precise.

When two CT3 interfaces are directly connected, you must configure the two ends with different clock modes.

Examples

# Set the clock mode to master for T3 2/4/0.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] clock master

controller t3

Use controller t3 to enter CT3 interface view.

Syntax

controller t3 interface-number

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

interface-number: Specifies a CT3 interface by its number.

Examples

# Enter the view of T3 2/4/0.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0]

display controller t3

Use display controller t3 to display information about CT3 interfaces.

Syntax

display controller [ t3 [ interface-number ] [ t1 line-number ] ]

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

t3 [ interface-number ]: Specifies a CT3 interface by its number. If you do not specify the t3 keyword, the command displays information about all CT3 interfaces, CPOS interfaces, CT1 interfaces, CE1 interfaces, and CE3 interfaces. If you specify the t3 keyword without specifying an interface, the command displays information about all CT3 interfaces.

t1 line-number: Specifies a T1 line by its number.

Usage guidelines

In addition to the state information about the CT3 interface, the command displays information about each T1 line on the CT3 interface if the interface is operating in CT3 mode.

Examples

# Display information about T3 2/4/0.

<Sysname> display controller t3 2/4/0

T3 2/4/0

Current state: UP

Description: T3 2/4/0 Interface

Last clearing of counters: Never

Current system time:2017-11-11 17:25:32

Last time when physical state changed to up:2017-11-11 17:25:26

Last time when physical state changed to down:2017-11-11 09:59:32

Basic Configuration:

Work mode: CT3, cable length: 49 feet

Frame-format: C-BIT Parity, line code: B3ZS

Source clock: slave, loopback: not set

Alarm state:

Receiver alarm state is none

MDL state:

No message is sent now.

Message data elements:

EIC: line, LIC: line, FIC: line, UNIT: line

PFI: line, PORT_NO: line, GEN_NO: line

Periodical detection: disabled

FEAC state:

No code is sent now.

Periodical detection is enabled, no code received now.

BERT state:(stopped, not completed)

Test pattern: 2^7, Status: Not Sync, Sync Detected: 0

Time: 0 minutes, Time past: 0 minutes

Bit errors (since test started): 0 bits

Bits received (since test started): 0 Mbits

Bit errors (since latest sync): 0 bits

Bits received (since latest sync): 0 Mbits

Historical Statistics:

Last link flapping: 6 hours 39 minutes 25 seconds

Data in current interval (22 seconds elapsed):

Line Code Violations: 0 seconds Far End Block Error: 0 seconds

C-Bit Coding Violation: 0 seconds

P-bit Coding Violation: 0 seconds

Framing Bit Err: 0 seconds, Severely Err Framing: 0 seconds

C-bit Err: 0 seconds, C-bit Severely Err: 0 seconds

P-bit Err: 0 seconds, P-bit Severely Err: 0 seconds

Unavailable: 0 seconds, Line Err: 0 seconds

T3 2/4/0 CT1 1: up

Frame-format: ESF, clock: slave, loopback: not set

FDL Performance Report: disabled

Transmitter is sending none

Receiver alarm state is none

Line loop back deactivate code using inband signal last sent

BERT state:(stopped, not completed)

Test pattern: 2^11, Status: Not Sync, Sync Detected: 0

Time: 0 minutes, Time past: 0 minutes

Bit errors (since test started): 0 bits

Bits received (since test started): 0 Kbits

Bit errors (since latest sync): 0 bits

Bits received (since latest sync): 0 Kbits

Table 8 Command output

Field	Description
Current state	Physical link state of the interface: · Administratively DOWN—The interface has been shut down by using the shutdown command. · DOWN—The interface is administratively up, but its physical state is down (possibly because no physical link exists or the link has failed). · UP—The interface is both administratively and physically up.
Description	Description of the interface.
Last clearing of counters	The most recent time that the reset counters controller t3 command was executed. This field displays Never if this command has not been executed since the device startup.
Basic Configuration	Basic configurations of the interface.
Work mode	Operating mode of the interface: CT3 or T3.
cable length	Cable length supported by the interface.
Frame-format	Frame format: C-bit parity or M23.
Source clock	Clock source used by the interface: master or slave.
loopback	Loopback setting on the interface: local, remote, payload, or not set.
Receiver alarm state is none	Type of the received alarm: none, LOS, LOF, RAI, or AIS. If the interface receives a LOS, LOF, or AIS alarm and sends out an RAI alarm, Transmitter is sending RAI is displayed.
No message is sent now.	No MDL message is being sent. If an MDL message, path or idle-signal for example, is being sent, Message sent now: path. idle signal is displayed.
Message data elements	MDL data elements.
EIC: line, LIC: line, FIC: line, UNIT: line	EIC, LIC, FIC, and UNIT are four elements present in all types of MDL messages. Their values are user configurable and default to line.
PFI: line, PORT_NO: line, GEN_NO: line	FI is contained in MDL path messages, PORT_NO in MDL idle signal messages, and GEN_NO in MDL test signal messages. Their values are user configurable and default to line.
Periodical detection	State of periodical detection of MDL. Periodical MDL message detection is disabled by default at the startup of the router. When this function is enabled, Periodical detection is enabled is displayed. When MDL messages are detected, information about detected MDL messages is displayed.
No code is sent now. DS3 Line Loop Back Deactivate was last sent.	No FEAC signal is sent. The FEAC signal sent last time is DS3 Line Loop Back Deactivate.
Periodical detection is enabled, no code received now.	Periodical detection of FEAC is enabled and no FEAC signal is received now. Periodical FEAC signal detection is enabled by default at the startup of the router.
DS3 Line Loop Back Deactivate last received.	The FEAC signal received last time is DS3 Line Loop Back Deactivate.
BERT state:(stopped, not completed)	BERT state: completed, stopped (not completed), or running.
Test pattern: 2^7, Status: Not Sync, Sync Detected: 0	Test pattern in use (such as 2^7, 2^11, 2^15, and QRSS), 2^7 in this sample output; synchronization state, and the number of detected synchronizations.
Time	Duration of the BERT test.
Time past	Time that has elapsed.
Bit errors (since test started)	Number of bit errors received since the start of the BERT test.
Bits received (since test started)	Number of bits received since the start of the BERT test.
Bit errors (since latest sync)	Number of bit errors received since the last synchronization.
Bits received (since latest sync)	Number of bits received since the last synchronization.
Last link flapping	The amount of time that has elapsed since the most recent physical state change of the interface. This field displays Never if the interface has been physically down since device startup.
Data in current interval (22 seconds elapsed):	Statistics spanning the current 15-minute interval.
Line Code Violations	Line code violations: BPV, or EXZ.
Far End Block Error	Far-end block error.
C-Bit Coding violation	C-bit coding violation.
P-bit Coding Violation	P-bit coding violation.
Framing Bit Err	Framing bit error.
Severely Err Framing Secs	Severely erroneous second.
C-bit Err Secs	C-bit erroneous second.
C-bit Severely Err Secs	C-bit severely erroneous second.
P-bit Err Secs	P-bit erroneous second.
P-bit Severely Err Secs	P-bit severely erroneous second.
Unavailable Secs	Service unavailable second.
Line Err Secs	Line erroneous second, during which LOS, BPV, EXZ, C-bit, P-bit, and other errors occur.
Data in Interval 1:	Statistics spanning interval 1.
Total Data (last 17 15 minute intervals)	Total data spanning the last 17 intervals.
T3 2/4/0 CT1 1 is up	State of T1 line on the CT3 interface: up or down. In this output sample, T1 line 1 is up.
Frame-format ESF, clock slave, loopback not set	Information about the T1 line: · Framing format—ESF or SF. · Clock source—Slave for the line clock and master for the internal clock. · Loopback—Local, remote, payload, or not set.
FDL Performance Report is disabled	Transmission of PPR in the FDL is disabled. You can enable it by using the t1 set fdl ansi command.
Transmitter is sending RAI	The transmitter of the T1 line is sending RAI signals. When the T1 line receives LOS, LOF, or AIS signals, it sends RAI signals.
Receiver alarm state is LOF	Type of alarm signal that the T1 line can receive: LOS, LOF, AIS, or RAI.
Line loop back activate code using inband signal last sent	The loopback code sent last time is in-band LLB activation request code.

‌

Related commands

reset counters controller t3

feac

Use feac to enable far end and control signal (FEAC) channel signal detection and transmission on a CT3 interface.

Use undo feac to remove the current FEAC settings.

Syntax

feac { detect | generate { ds3-los | ds3-ais | ds3-oof | ds3-idle | ds3-eqptfail | loopback { ds3-line | ds3-payload } } }

undo feac { detect | generate { ds3-los | ds3-ais | ds3-oof | ds3-idle | ds3-eqptfail | loopback { ds3-line | ds3-payload } } }

Default

On a CT3 interface, periodical FEAC channel signal detection is enabled, and FEAC signal transmission is disabled.

Views

CT3 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

detect: Enables periodical FEAC channel signal detection.

generate: Generates a specific type of FEAC signal.

· ds3-los: Specifies the DS3 LOS signal.

· ds3-ais: Specifies the DS3 AIS signal.

· ds3-oof: Specifies the DS3 OOF signal.

· ds3-idle: Specifies the DS3 idle signal.

· ds3-eqptfail: Specifies DS3 equipment failure signal.

loopback: Sends a specific type of loopback code for activating a specific loopback.

· ds3-line: Specifies far-end line loopback.

· ds3-payload: Specifies payload loopback.

Usage guidelines

FEAC is a channel formed by using the third C-bit in the first subframe in C-bit framing. The channel is used for the following purposes:

· Transmits alarm state signals for line test.

· Transmits loopback control code to activate or deactivate far-end loopback during a loopback test.

According to ANSI T1.107a, the framing format of FEAC channels is bit-oriented protocol (BOP).

After far-end loopback is activated by using the feac generate loopback { ds3-line | ds3-payload } command, you can remove it by using the undo form of the command.

Before you configure far-end loopback by using this command, disable FEAC detection on the local end to prevent loopback deadlock. Loopback deadlock occurs when the local end enables loopback after detecting the loopback code sent back by the far end.

To display the transmitting and receiving state of the FEAC channel, use the display controller t3 command.

Examples

# Enable FEAC channel signal detection on T3 2/4/0.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] feac detect

# Send DS3 LOS signal on T3 2/4/0.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] feac generate ds3-los

# On T3 2/4/0, send loopback code to the far end to place the far end in a line loopback.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] feac generate loopback ds3-line

Related commands

display controller t3

frame-format

Use frame-format to set the framing format for a CT3 interface.

Use undo frame-format to restore the default.

Syntax

frame-format { c-bit | m23 }

undo frame-format

Default

The framing format for a CT3 interface is C-bit.

Views

CT3 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

c-bit: Sets the framing format to C-bit.

m23: Sets the framing format to m23.

Usage guidelines

This command is available only in channelized mode.

Examples

# Set the framing format to m23 for T3 2/4/0.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] frame-format m23

Related commands

using

ft3

Use ft3 to configure a CT3 interface to operate in FT3 mode and set the DSU mode or the subrate, or enable payload scrambling for the interface.

Use undo ft3 to restore the default.

Syntax

ft3 { dsu-mode { 0 | 1 | 2 | 3 | 4 } | subrate number | scramble }

undo ft3 { dsu-mode | subrate | scramble }

Default

DSU mode 0 (the Digital Link mode) is used, and the subrate is 44210 kbps. Payload scrambling is disabled.

Views

CT3 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

dsu-mode: Specifies the DSU mode.

Table 9 FT3 DSU mode options

Keyword	DSU mode (vendor)	Subrate range	Total number of subrate grades
0	Digital Link	300 to 44210 kbps in steps of 300746 bps	147
1	Kentrox	1500 to 35000 kbps in steps of 500000 bps 44210 kbps	69
2	Larscom	3100 to 44210 kbps in steps of 3157835 bps	14
3	Adtran	75 to 44210 kbps in steps of 75187 bps	588
4	Verilink	1500 to 44210 kbps in steps of 1578918 bps	20

‌

subrate number: Specifies the subrate for the CT3 interface. The number argument is in the range of 1 to 44210 (in kbps).

scramble: Enables payload scrambling for the CT3 interface.

Usage guidelines

This command is applicable only to CT3 cards that support FT3.

This command is available only in T3 mode.

FT3 (Fractional T3 or Subrate T3) mode is a nonstandard E3 application mode. FE3 subrate ranges and the number of subrate grades vary by vendor. You can use the ft3 command to configure the device to be compatible with the FE3 DSU modes listed in Table 9.

After you set the subrate by using the ft3 subrate command, the T3 interface searches the subrate levels corresponding to the DSU mode in which it is operating. The T3 interface selects the subrate level that is closest to subrate level set by the ft3 subrate command. The device adjusts the hardware to allow for the subrate.

Use the ft3 scramble command to enable payload scrambling for the interface. Payload scrambling improves line quality by preventing the presence of long strings of all 1s or all 0s.

You can use the display interface serial interface-number:0 command to check the following settings of a CT3 interface:

· DSU mode.

· Subrate.

· Actual rate.

The actual rate does not count in the overhead bits.

· Baud rate.

The baud rate is the actual T3 line rate (44736 kbps), with the overhead bits counted in.

· Payload scrambling setting.

Examples

# Configure T3 2/4/0 to operate in the FT3 mode. Set the DSU mode to 1 and the subrate to 3000 kbps. Enable payload scrambling for the interface.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] using t3

[Sysname-T3 2/4/0] ft3 dsu-mode 1

[Sysname-T3 2/4/0] ft3 subrate 3000

[Sysname-T3 2/4/0] ft3 scramble

loopback

Use loopback to enable a type of loopback on a CT3 interface.

Use undo loopback to disable loopback on a CT3 interface.

Syntax

loopback { local | payload | remote }

undo loopback

Default

Loopback is disabled on CT3 interfaces.

Views

CT3 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

local: Enables internal loopback.

payload: Enables external payload loopback.

remote: Enables external loopback.

Usage guidelines

Loopback is intended for testing only. Disable the feature when the interface is operating correctly.

If a CT3 interface encapsulated with PPP or HDLC is placed in a loopback, the state of the link layer protocol is reported as down.

Examples

# Enable internal loopback on interface T3 2/4/0.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] loopback local

mdl

Use mdl to configure MDL message detection and transmission on a CT3 interface.

Use undo mdl to restore the default.

Syntax

mdl { data { eic string | fic string | gen-no string | lic string | pfi string | port-no string | unit string } | detect | generate { idle-signal | path | test-signal } }

Default

Periodic MDL detection is disabled. CT3 interfaces do not send MDL messages.

Views

CT3 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

data: Sets MDL message parameters. If you do not specify a parameter, a default string of line is set in the MDL messages.

· eic string: Specifies the equipment identification code, a string of 1 to 10 characters. This parameter is contained in all three types of MDL messages.

· fic string: Specifies the frame identification code, a string of 1 to 10 characters. This parameter is contained in all three types of MDL messages.

· gen-no string: Specifies the generator number, a string of 1 to 38 characters. This parameter is specific to test signal messages.

· lic string: Specifies the location identification code, a string of 1 to 11 characters. This parameter is contained in all three types of MDL messages.

· pfi string: Specifies the path facility identification, a string of 1 to 38 characters. This parameter is specific to path messages.

· port-no string: Specifies the port number in idle signal message, a string of 1 to 38 characters. This parameter is specific to idle signal messages.

· unit string: Specifies the unit, a string of 1 to 6 characters. This parameter is contained in all three types of MDL messages.

detect: Enables periodical MDL message detection.

generate: Sends a specific type of MDL message.

· idle-signal: Specifies MDL idle signal messages.

· path: Specifies MDL path messages.

· test-signal: Specifies MDL test signal messages.

Usage guidelines

MDL is a channel formed by using the three C-bits in the fifth subframe in C-bit framing. According to ANSI T1.107a, MDL can transmit path, idle signal, and test signal messages. The data framing format is LAPD for MDL messages.

To send idle signal, path, and test signal messages simultaneously, repeat the mdl command to specify the idle-signal, path, and test-signal keywords.

To display the receiving and transmission status of the MDL link, use the display controller t3 command.

Examples

# Enable MDL detection on T3 2/4/0.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] mdl detect

# Set LIC to hello for CT3 interface T3 2/4/0.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] mdl data lic hello

# Send path messages on CT3 interface T3 2/4/0.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] mdl generate path

Related commands

display controller t3

reset counters controller t3

Use reset counters controller t3 to clear CT3 interface statistics.

Syntax

reset counters controller t3 [ interface-number ]

Views

User view

Predefined user roles

network-admin

mdc-admin

Parameters

interface-number: Specifies a CT3 interface by its number. If you do not specify this argument, the command clears statistics for all CT3 interfaces.

Usage guidelines

The reset counters interface command clears statistics for all interfaces.

To display CT3 interface statistics, use the display controller t3 command.

Examples

# Clear statistics for T3 2/4/0.

<Sysname> reset counters controller t3 2/4/0

Related commands

display controller t3

t1 alarm

Use t1 alarm to enable a T1 line on a CT3 interface to detect/send alarm signals.

Use undo t1 alarm to remove the alarm signal detection/sending setting.

Syntax

t1 line-number alarm { detect | generate { ais | rai } }

undo t1 line-number alarm { detect | generate { ais | rai } }

Default

On a CT3 interface, periodical alarm detection is enabled, and alarm signal sending is disabled.

Views

CT3 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

line-number: Specifies a T1 line number in the range of 1 to 28.

detect: Specifies periodical alarm signal detection.

generate: Sends a specific type of alarm signals. These alarm signals are used for line status test.

· ais: Alarm indication signal.

· rai: Remote alarm indication signal.

Usage guidelines

At startup, periodical alarm signal detection is enabled on all T1 lines on the CT3 interface. When a T1 line detects LOS, LOF, or AIS signals, it sends RAI signals to its peer.

The supported alarm signals (LOS, LOF, AIS, RAI, FEBE, and idle) are ANSI T1.403 compliant.

Only one type of alarm signal can be sent on a T1 line at a time. To send another type of signal, you must first remove the previous setting by using the undo t1 alarm command. If a RAI signal is present because an LOS, LOF, or AIS alarm is detected, you must first use the undo t1 alarm detect command to remove the signal.

To display the real-time alarm state on T1 lines, use the display controller t3 command.

Examples

# Enable periodical alarm signal detection on T1 line 1 on T3 2/4/0.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] t1 1 alarm detect

# Enable T1 line 1 on T3 2/4/0 to send AIS alarm signals.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] t1 1 alarm generate ais

Related commands

display controller t3

t1 channel-set

Use t1 channel-set to bundle timeslots into a channel set on a T1 line.

Use undo t1 channel-set to remove a channel set.

Syntax

t1 line-number channel-set set-number timeslot-list list [ speed { 56k | 64k } ]

undo t1 line-number channel-set set-number

Default

No channel sets exist on a T1 line.

Views

CT3 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

line-number: Specifies a T1 line number in the range of 1 to 28.

set-number: Specifies the number of a channel set created by timeslot bundling on a T1 line, in the range of 0 to 23.

speed { 56k | 64k }: Speed of the timeslot bundle (the channel set) in kbps. If 56k is selected, the timeslots are bundled into an n × 56 kbps bundle. If 64k, the default, is selected, the timeslots are bundled into an n × 64 kbps bundle.

Usage guidelines

When a T1 line is operating in framed (CT1) mode, you can bundle timeslots on it. For each channel set, the system automatically creates a serial interface named serial number/line-number:set-number. This interface operates at n × 64 kbps or n × 56 kbps, where n is the number of bundled timeslots. This interface has the same logical features as a standard synchronous serial interface. You can configure this serial interface in the same way you configure a standard synchronous serial interface.

Examples

# Create a 128 kbps serial interface through timeslot bundling on T1 line 1 on T3 2/4/0.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] t1 1 channel-set 1 timeslot-list 1,2

Related commands

t1 unframed

t1 clock

Use t1 clock to set the clock mode of a T1 line on a CT3 interface.

Use undo t1 clock to restore the default.

Syntax

t1 line-number clock { master | slave }

undo t1 line-number clock

Default

The clock mode of a T1 line on a CT3 interface is slave.

Views

CT3 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

line-number: Specifies a T1 line number in the range of 1 to 28.

master: Sets the clock mode to master.

slave: Sets the clock mode to slave.

Usage guidelines

When the clock mode of a T1 line is master, it uses the internal clock source. When the clock mode of a T1 line is slave, it uses the line clock source.

When a CT3 interface is operating in channelized mode, its T1 lines might use separate clocks.

Examples

# Set the clock mode to slave for T1 line 1 on T3 2/4/0.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] t1 1 clock slave

t1 fdl

Use t1 fdl to set the behavior of a T1 line on the FDL in ESF framing.

Use undo t1 fdl to disable FDL of T1.

Syntax

t1 line-number fdl { ansi | att | both | none}

undo t1 line-number fdl

Default

FDL is disabled in ESF framing.

Views

CT3 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

line-number: Specifies a T1 line number in the range of 1 to 28.

ansi: Specifies ANSI T1.403 for FDL.

att: Specifies AT&T TR 54016 for FDL.

both: Specifies both ANSI T1.403 and AT&T TR 54016 for FDL.

none: Disables the use of FDL on the T1 line.

Usage guidelines

FDL is an embedded 4 kbps overhead channel within the ESF format for transmitting periodical performance report (PPR) statistics or loopback code.

According to ANSI T1.403, the format of PPR is LAPD, and the format of loopback code is BOP.

The t1 set fdl command only starts PPR transmission. It cannot enable loopback code transmission or detection.

This command only applies to channelized T1 lines with a T1 frame format of ESF.

Examples

# Set the FDL to be ANSI T1.403 compliant for T1 line 1 on T3 2/4/0.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] t1 1 fdl ansi

Related commands

t1 frame-format

Use t1 frame-format to set the framing format for a T1 line.

Use undo t1 frame-format to restore the default.

Syntax

t1 line-number frame-format { esf | sf }

undo t1 line-number frame-format

Default

The framing format of a T1 line is ESF.

Views

CT3 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

line-number: Specifies a T1 line number in the range of 1 to 28.

esf: Sets the T1 line to use the ESF format.

sf: Sets the T1 line to use the SF format.

Usage guidelines

You can configure this command only when the T1 line is operating in framed mode. To configure a T1 line to operate in framed mode, use the undo t1 unframed command.

Examples

# Set the framing format to SF for T1 line 1 on T3 2/4/0.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] t1 1 frame-format sf

Related commands

t1 unframed

t1 loopback

Use t1 loopback to enable a type of loopback for a T1 line on a CT3 interface.

Use undo t1 loopback to disable loopback for a T1 line on a CT3 interface.

Syntax

t1 line-number loopback { local | payload | remote }

undo t1 line-number loopback

Default

Loopback is disabled on T1 lines.

Views

CT3 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

line-number: Specifies a T1 line number in the range of 1 to 28.

local: Enables internal loopback.

payload: Enables payload loopback mode.

remote: Enables external loopback.

Usage guidelines

Loopback is intended for testing only. Disable the feature when the interface is operating correctly.

If a T1 line encapsulated with PPP or HDLC is in loopback mode, the state of the link layer protocol is reported as down.

Examples

# Enable internal loopback on T1 line 1 on T3 2/4/0.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] t1 1 loopback local

t1 sendloopcode

Use t1 sendloopcode to set the loopback mode of a far-end T1 line.

Use undo t1 sendloopcode to remove the corresponding setting.

Syntax

t1 line-number sendloopcode { fdl-ansi-line-up | fdl-ansi-payload-up | fdl-att-payload-up | inband-line-up }

undo t1 line-number sendloopcode { fdl-ansi-line-up | fdl-ansi-payload-up | fdl-att-payload-up | inband-line-up }

Default

No loopback mode is set.

Views

CT3 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

line-number: Specifies a T1 line number, in the range of 1 to 28.

fdl-ansi-line-up: Sends ANSI-compliant LLB activation request code in the FDL to start remote loopback.

fdl-ansi-payload-up: Sends ANSI-compliant PLB activation request code in the FDL to start remote loopback.

fdl-att-payload-up: Sends AT&T-compliant PLB activation request code in the FDL to start remote loopback.

inband-line-up: Sends in-band LLB activation request code compliant with the ANSI and AT&T implementation to start remote loopback.

Usage guidelines

Loopback is an effective method of diagnosis. You can place a far-end device into loopback mode either at the command line on it or by sending loopback control code to it. The types and formats of loopback control code supported on T1 interfaces are compliant with ANSI T1.403.

Loopback can be divided into line loopback and payload loopback. The data stream is looped back at the framer only in the line loopback.

You can transmit loopback control code by using the in-band signal (the 192 effective bandwidth bits or all 193 bits of T1) or the FDL in ESF frames.

Examples

# Send the in-band signal on T1 line 1 on T3 2/4/0 to place the far-end T1 line in line loopback mode.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] t1 1 sendloopcode inband-line-up

t1 show

Use t1 show to have a quick look at the line state of a T1 line on a CT3 interface.

Syntax

t1 line-number show

Views

CT3 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

line-number: Specifies a T1 line number in the range of 1 to 28.

show: Displays the physical line state of the specified T1 line.

Examples

# Display line state of T1 line 1 on T3 2/4/0.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] t1 1 show

T3 2/4/0 CT1 1: up

Frame-format: ESF, clock: slave, loopback: not set

FDL Performance Report: disabled

Transmitter is sending RAI

Receiver alarm state is LOF

Line loop back activate code using inband signal last sent

BERT state:(stopped, not completed)

Test pattern: 2^11, Status: Not Sync, Sync Detected: 0

Time: 0 minutes, Time past: 0 minutes

Bit errors (since test started): 0 bits

Bits received (since test started): 0 Kbits

Bit errors (since latest sync): 0 bits

Bits received (since latest sync): 0 Kbits

Table 10 Command output

Field	Description
T3 2/4/0 CT1 1 is up	State of T1 line 1 on the CT3 interface: up or down.
Frame-format	Framing format of T1: ESF or SF.
clock	Clock source used by the T1 line: master or slave.
loopback	Loopback state or mode: local, remote, payload, or not set.
FDL Performance Report is disabled	Transmission of PPR in the FDL is disabled. You can enable it by using the t1 set fdl ansi command.
Transmitter is sending RAI	The transmitter of the T1 line is sending RAI signals. When the T1 line receives LOS, LOF, or AIS signals, it sends RAI signals.
Receiver alarm state is LOF	Type of alarm signal that the T1 line can receive: LOS, LOF, AIS, or RAI.
Line loop back activate code using inband signal last sent	The loopback code sent last time is in-band LLB activation request code.
BERT state	BERT test state: running, complete, or stopped (not completed).
Test pattern	Test pattern in use.
Status	Synchronization state.
Sync Detected	Number of detected synchronizations.
Time	Duration of the BERT test.
Time past	Time that has elapsed.
Bit errors (since test started)	Number of bit errors received since the start of the BERT test.
Bits received (since test started)	Number of bits received since the start of the BERT test.
Bit errors (since latest sync)	Number of bit errors received since the last synchronization.
Bits received (since latest sync)	Number of bits received since the last synchronization.

‌

t1 shutdown

Use t1 shutdown to shut down a T1 line on a CT3 interface.

Use undo t1 shutdown to bring up a T1 line.

Syntax

t1 line-number shutdown

undo t1 line-number shutdown

Default

T1 lines on a CT3 interface are up.

Views

CT3 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

line-number: Specifies a T1 line number in the range of 1 to 28.

Usage guidelines

Shutting down or bringing up a T1 line also shuts down or brings up the serial interface created for it.

Examples

# Shut down T1 line 1 on T3 2/4/0.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] t1 1 shutdown

t1 unframed

Use t1 unframed to set a T1 line on a CT3 interface to operate in unframed mode (T1 mode).

Use undo t1 unframed to set a T1 line on a CT3 interface to operate in framed mode (CT1 mode).

Syntax

t1 line-number unframed

undo t1 line-number unframed

Default

T1 lines on a CT3 interface are operating in framed mode.

Views

CT3 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

line-number: Specifies a T1 line number in the range of 1 to 28.

Usage guidelines

A T1 line in unframed mode does not contain frame control information or support timeslot division. The system automatically creates a 1544 kbps serial interface named serial number/line-number:0. This interface has the same logical features as a standard synchronous serial interface. You can configure this serial interface in the same way you configure a standard synchronous serial interface.

Examples

# Set T1 line 1 on T3 2/4/0 to operate in unframed mode.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] t1 1 unframed

Related commands

t1 channel-set

using

Use using to configure the operating mode of a CT3 interface.

Use undo using to restore the default.

Syntax

using { ct3 | t3 }

undo using

Default

A CT3 interface operates in channelized mode.

Views

CT3 interface view

Predefined user roles

network-admin

mdc-admin

Parameters

ct3: Sets the CT3 interface to operate in channelized mode.

t3: Sets the CT3 interface to operate in unchannelized mode.

Usage guidelines

You can only configure T1 lines on CT3 interfaces in channelized mode.

When a CT3 interface operates in unchannelized mode, the system automatically creates a 44.736 Mbps serial interface named serial number/0:0 for it. This interface has the same logical features as a standard synchronous serial interface. You can configure this serial interface in the same way you configure a standard synchronous serial interface.

Examples

# Configure T3 2/4/0 to operate in unchannelized mode.

<Sysname> system-view

[Sysname] controller t3 2/4/0

[Sysname-T3 2/4/0] using t3

03-Interface Command Reference

WAN interface commands

Serial interface commands

baudrate

clock

crc

idle-code

invert receive-clock

invert transmit-clock

reset counters interface serial

reverse-rts

Basic CE1 interface commands

cable (CE1 interface)

data-coding (CE1 interface)

frame-format (CE1 interface)

loopback (CE1 interface)

reset counters controller e1

Basic CT1 interface commands

data-coding (CT1 interface)

fdl

loopback (CT1 interface)

reset counters controller t1

E1-F interface commands

fe1 data-coding

fe1 frame-format

fe1 timeslot-list

fe1 unframed

reset counters interface serial

T1-F interface commands

crc

ft1 clock

ft1 frame-format

reset counters interface serial

CT3 interface commands

cable

display controller t3

ft3

t1 channel-set

t1 fdl

t1 unframed

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