Specifications

Configuring and Managing Integrated Modems
Configuration Examples for Modem Management
DC-110
Cisco IOS Dial Technologies Configuration Guide
Phase Jitter Level : 2 degrees
Far End Echo Level : -90 dBm
Phase Roll : 0 degrees
Total Retrains : 0
EC Retransmission Count : 0
Characters transmitted, received : 0, 0
Characters received BAD : 0
PPP/SLIP packets transmitted, received : 0, 0
PPP/SLIP packets received (BAD/ABORTED) : 0
EC packets transmitted, received OK : 0, 0
EC packets (Received BAD/ABORTED) : 0
Modem Performance Summary Example
You can display a high level summary of the performance of a modem with the show modem summary
command:
Router# show modem summary
Incoming calls Outgoing calls Busied Failed No Succ
Usage Succ Fail Avail Succ Fail Avail Out Dial Ans Pct.
14% 2489 123 15 0 0 15 0 3 3 95%
Modem AT-Mode Example
The following example shows that modem 1/1 has one open AT directly connected session:
Router# show modem at-mode
Active AT-MODE management sessions:
Modem User's Terminal
1/1 0 cty 0
Connection Speed Performance Verification Example
Making sure that your modems are connecting at the correct connection speeds is an important aspect of
managing modems. The show modem connect-speeds and show modem commands provide
performance information that allow you to investigate possible inoperable or corrupt modems or T1/E1
lines. For example, suppose you have an access server that is fully populated with V.34 modems. If you
notice that modem 1/0 is getting V.34 connections only 50 percent of the time, whereas all the other
modems are getting V.34 connections 80 percent of the time, then modem 1/0 is probably
malfunctioning. If you are reading low connection speeds across all the modems, you may have a faulty
channelized T1 or ISDN PRI line connection.
To display connection speed information for all modems that are running in your system, use the show
modem connect-speeds max-speed EXEC command. Because most terminal screens are not wide
enough to display the entire range of connection speeds at one time (for example, 75 to 56,000 bps), the
max-speed argument is used. This argument specifies the contents of a shifting baud-rate window, which
provides you with a snapshot of the modem connection speeds for your system. Replace the max-speed
argument with the maximum connect speed that you want to display. You can specify from 12,000 to
56,000 bps. If you are interested in viewing a snapshot of lower baud rates, specify a lower connection
speed. If you are interested in displaying a snapshot of higher rates, specify a higher connection speed.