H3C Technologies H3C SR8800 - Manual (Page 77)

69
Managing a modem
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.