Specifications

Configuring and Managing Integrated Modems
Managing Modems
DC-101
Cisco IOS Dial Technologies Configuration Guide
* 2/17 5 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0
* 2/18 5 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0
* 2/19 3 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0
* 2/20 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
* 2/21 4 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0
* 2/22 2 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0
* 2/23 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Total 84 0 0 0 0 0 0 0
Removing Inoperable Modems
To manually remove inoperable modems from dialup services, use the following commands in line
configuration mode:
If you use the modem bad command to remove an idle modem from dial services and mark it as
inoperable, the letter B is used to identify the modem as bad. The letter B appears in the Status column
in the output of show modem slot/port command and in the far left column in the output of the show
modem command. Use the no modem bad command to unmark a modem as B and restore it for dialup
connection services. If the letter B appears next to a modem number, it means the modem was removed
from service with the modem shutdown command.
Note Only idle modems can be marked “bad” by the modem bad command. If you want to mark a modem
bad that is actively supporting a call, first enter the modem shutdown command, then enter the
modem bad command.
Use the modem hold-reset command if a router is experiencing extreme modem behavior (for example,
if the modem is uncontrollably dialing in to the network). This command prevents the modem from
establishing software relationships such as those created by the test modem back-to-back command.
The modem is unusable while the modem hold-reset command is configured. The modem hold-reset
command also resets 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.
The following example disables a suspended modem and resets its hardware initialization:
Router# configure terminal
Router(config)# line 4
Router(config-line)# modem hold-reset
Router(config-line)# no modem hold-reset
Command Purpose
Step 1
Router(config-line)# modem bad
Removes and idles the modem from service and
indicates it as suspected or proven to be inoperable.
Step 2
Router(config-line)# modem hold-reset
Resets and isolates the modem hardware for extensive
troubleshooting.
Step 3
Router(config-line)# modem shutdown
Abruptly shuts down a modem from dial service.
Step 4
Router(config-line)# modem recovery-time minutes
Sets the maximum amount of time for which the
call-switching module waits for a local modem to
respond to a request before it is considered locked in a
suspended state. The default is 5 minutes.