4G

This help contains the following topics:

·     Introduction

·     Restrictions and guidelines

¡     Restrictions for using the 4G feature

¡     Restrictions and guidelines for using a USB 4G modem

·     Configure

Introduction

The 4G feature enables the device to access a 4G network.

The device uses a fixed cellular interface to manage 4G functions. The cellular interface can be channelized into an Eth-channel interface. The data link layer protocol of the Eth-channel interface is Ethernet. It supports IP at the network layer. The Eth-channel interface obtains an IP address through DHCP.

Restrictions and guidelines

Restrictions for using the 4G feature

The 4G modem of the device provides access only to an LTE network.

Restrictions and guidelines for using a USB 4G modem

Support for USB 4G modems depends on the device model. Follow these restrictions and guidelines when you use a USB 4G modem:

¡     Install a USB 4G modem on the device before configuring the 4G feature.

¡     Do not remove a USB 4G modem while it is transmitting data. As a best practice, execute the shutdown command to shut down the USB 4G modem before removing it.

¡     A USB 4G modem is unavailable when the USB interface to which the modem is attached is shut down.

¡     A USB 4G modem is hot swappable.

¡     The settings in cellular interface view remain after the USB 4G modem is removed.

Configure 4G

Configure 4G as shown in Figure 1.

Figure 1 4G configuration procedure

Procedure

1.     Select Network > Interface Configuration > 4G.

2.     Select a cellular interface.

The device will create Eth-channel interface 0, and associate the interface with dialer group 1 to allow all IPv4 packets. The Eth-channel interface obtains an IP address through DHCP. Traditional DDR is enabled for the Eth-channel interface by default.

3.     Set the dial string for placing calls. The device will dial the peer device automatically after you set the dialer number.

4.     Set the interval for DDR to make the next call attempt. DDR will automatically dial the number at the specified intervals until a connection is established.

5.     Click Apply.

6.     To clear the configuration and delete the Eth-channel interface, click Clear.