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Troubleshooting Modems
Hold and Reset a Modem
This section applies to Microcom modems only. To reset and isolate the modem hardware for
extensive troubleshooting, enter the following command in line configuration mode [the prompt is
displayed as
•
Use this command if you are experiencing extreme modem behavior (for example, if the modem is
uncontrollably dialing into the network). This command prevents the modem from establishing
software relationships such as those created by the test back-to-back modem command and the
modem startup-test command. The modem is unusable while the modem hold-reset command is
configured.
This command is also used to reset a modem that is frozen in a suspended state. Disable the
suspended modem with the modem hold-reset command, and then restart hardware initialization
with the no modem hold-reset command. A modem decommissioned by the modem hold-reset
command does not accept modem firmware upgrades using the copy modem command.
Disable a Modem from Dial-Up Services
To disable modems from dialing or answering calls, enter one of the following commands in line
configuration mode [the prompt is displayed as
•
•
The modem busyout command is not executed until the active modem is idle. No active connections
are interrupted when you use this command. In contrast, the modem shutdown command
immediately terminates all active connections on the specified modem. The resulting modem status
for both these commands is the same. Enable the no form of these commands to restore a modem
for dial-up services.
You can still configure the following commands on a disabled modem:
•
•
•
•
Debug a Modem
To debug a modem or group of modems, enter the following commands in enable mode (the prompt
is displayed as
•
•
•
A-8
Cisco AS5300 Universal Access Server Software Configuration Guide
5300(config-line)#
modem hold-reset—Reset and isolate the modem hardware.
modem busyout—Gracefully disable a modem from dial-up services.
modem shutdown—Abruptly shut down a modem from dial-up services.
test modem back-to-back
clear modem
modem bad
copy modem
):
5300#
debug modem oob [slot/modem-port | group group-number]—Debug a modem's out-of-band
port, which is used to poll modem events.
debug modem csm [slot/modem-port | group group-number]—Debug a call-switching module,
which is used to connect calls.
debug modem trace [normal | abnormal | all] [slot/modem-port | group
group-number]—Debug the call trace, which determines why calls are terminated. Use this
keyword only with manageable modems. Upload the call trace on normal, abnormal, or all call
terminations.
]:
5300(config-line)#
]:
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