Specifications

Configuring and Managing Integrated Modems
Managing Modems
DC-70
Cisco IOS Dial Technologies Configuration Guide
Troubleshooting the Dial-In Connection
Depending upon the problems you experience, take the appropriate action:
• If you are having problems making or receiving calls, make sure that you turned on the protocols for
connecting to the lines and configured for incoming and outgoing calls.
• If the calls are not coming up at all, turn on modem debugging. Use the the modem debugging
commands as follows:
– The debug modem command enables debugging on the modem line.
– The debug modem csm (or debug csm modem) command enables debugging for lines
configured for digital modems.
– The debug isdn q931 command enables debugging for lines configured for the ISDN and
Signaling System 7 (SS7) Q.931 protocols.
– The debug cas command enables debugging for lines configured for channel-associated
signaling (CAS).
Following is a sample of how to enable and then disable Cisco IOS modem debugging commands
on a network access server:
Router# debug modem
Router# debug modem csm
Router# debug isdn q931
Router# no debug modem
Router# no debug modem csm
Router# no debug isdn q931
• Enter the debug modem ? command for a list of additional modem debugging commands:
Router# debug modem ?
b2b Modem Special B2B
csm CSM activity
maintenance Modem maintenance activity
mica MICA Async driver debugging
oob Modem out of band activity
tdm B2B Modem/PRI TDM
trace Call Trace Upload
• Turn off the messages by entering the no debug modem command.
For more detailed information refer to the TAC Tech Notes document, Troubleshooting Modems, at the
following URL: http://www.cisco.com/warp/public/471/index_14280.html
Configuring the Modem Using a Modemcap
Modems are controlled by a series of parameter settings (up to a limit of 128 characters) that are sent to
the modem to configure it to interact with a Cisco device in a specified way. The parameter settings are
stored in a database called a modem capability (modemcap). The Cisco IOS software contains defined
modemcaps that have been found to properly initialize internal modems. Following are the names of
some modemcaps available in the Cisco IOS software:
• cisco_v110—Cisco (NEC) internal V.110 TA (AS5200)
• mica—Cisco MICA HMM/DMM internal digital modem
• nextport—Cisco NextPort CSMV/6 internal digital modem
• microcom_hdms—Microcom HDMS chassis