04-Layer 2 - WAN Configuration Guide

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05-Modem Management Configuration
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05-Modem Management Configuration 54.92 KB

This chapter describes how to manage and control the modem connected to the router.

Managing a modem

To manage a modem:

 

Step

Command

Remarks

1.     Enter system view.

system-view

N/A

2.     Enter user interface view.

user-interface { first-num1 [ last-num1 ] | aux first-num2 [ last-num2 ] }

N/A

3.     Enable modem call-in/call-out.

modem { both | call-in | call-out }

Modem call-in and call-out are denied by default.

4.     Set the maximum interval allowed between picking up the handset and dialing when a user tries to establish a connection.

modem timer answer time

Optional.

60 seconds by default.

5.     Set the modem to work in auto-answer mode.

modem auto-answer

Optional.

If the modem answer mode configured is not consistent with the actual answer mode of the modem, the modem may operate improperly. Do not perform the operation unless absolutely needed.

Non-auto answer mode by default.

6.     Return to system view.

quit

N/A

7.     Enable modem callback.

service modem-callback

Optional.

Disabled by default.

 

Troubleshooting

Symptom

Modem is in abnormal status (for example, the dial tone or busy tone keeps humming).

Solution

·           Use the shutdown command and undo shutdown command on the router physical interface connected to the modem to check whether the modem has been restored to normal status.

·           If the modem is still in abnormal status, you can re-power the modem.