Specifications

Configuring and Managing Integrated Modems
Managing Modems
DC-96
Cisco IOS Dial Technologies Configuration Guide
Router# test modem back-to-back 1/1 1/0
Repetitions (of 10-byte packets) [1]: 10
Router#
%MODEM-5-B2BCONNECT: Modems (1/1) and (1/0) connected in back-to-back test: CONN
ECT9600/REL-MNP
%MODEM-5-B2BMODEMS: Modems (1/0) and (1/1) completed back-to-back test: success/
packets = 20/20
After you enter the test modem back-to-back command, you must define the number of packets sent
between modems at the Repetitions prompt. The ideal range of packets to send and receive is from 1 to
100. The default is 1 packet that is 10 bytes large. The response message (for example, “success/packets
= 20/20”) tells you how many packets were sent in both directions compared to the total number of
packets attempted to be sent in both directions. Because the software reports the packet total in both
directions, the reported numbers are two times the number you originally specify.
When a known good modem is tested against a known bad modem, the back-to-back modem test fails.
In the following example, modem 1/3 is suspected or proven to be inoperable or bad:
Router# test modem back-to-back 1/1 1/3
Repetitions (of 10-byte packets) [1]: 10
Router#
%MODEM-5-BADMODEMS: Modems (1/3) and (1/1) failed back-to-back test: NOCARRIER
Step 2 You would need to manually mark modem 1/3 as an inoperable or bad modem. You mark the bad modem
by determining which line number corresponds with the modem. Use the show modem 1/3 EXEC
command to verify that TTY line number 4 (shown as
TTY4) is used for modem 1/3:
Router# show modem 1/3
Mdm Typ Status Tx/Rx G Duration TX RX RTS CTS DSR DCD DTR
1/3 V34 Idle 28800/28800 0 00:00:00 x x x x x
Modem 1/3, Microcom MNP10 V34 Modem (Managed), TTY4
Firmware (Boot) Rev: 1.0(23) (1.0(5))
Modem config: Incoming and Outgoing
Protocol: reliable/MNP, Compression: V42bis
Management port config: Status polling and AT session
Management port status: Status polling and AT session
TX signals: -15 dBm, RX signals: -17 dBm
Last clearing of "show modem" counters never
0 incoming completes, 0 incoming failures
0 outgoing completes, 0 outgoing failures
0 failed dial attempts, 0 ring no answers, 1 busied outs
0 no dial tones, 0 dial timeouts, 0 watchdog timeouts
0 no carriers, 0 link failures, 0 resets, 0 recover oob
0 protocol timeouts, 0 protocol errors, 0 lost events
Transmit Speed Counters:
Connection Speeds 75 300 600 1200 2400 4800
# of connections 0 0 0 0 0 0
Connection Speeds 7200 9600 12000 14400 16800 19200
# of connections 0 0 0 0 0 0
Connection Speeds 21600 24000 26400 28800 31200 32000
# of connections 0 0 0 1 0 0
Connection Speeds 33600 34000 36000 38000 40000 42000
# of connections 0 0 0 0 0 0
Connection Speeds 44000 46000 48000 50000 52000 54000
# of connections 0 0 0 0 0 0
Connection Speeds 56000
# of connections 0