Specifications

4-15
Cisco AS5x00 Case Study for Basic IP Modem Services
11/24/1999
Section 4 Verifying Modem Performance
Initiating a Modem Loopback Test Call
Type 10 is the login timer. The timeout is 30 seconds. The user’s EXEC-shell login password is
suppressed.
Step 10
Identify who is logged in. TTY line 3 corresponds to modem 1/2. Use the
show terminal
command to
see which modem is assigned to the TTY line.
5300-NAS>show user
Line User Host(s) Idle Location
3 tty 3 admin idle 0
* 98 vty 0 joe 172.22.66.1 0 leftfield.mauionions.com
Interface User Mode Idle Peer Address
Step 11
Program the terminal window not to pause in the middle of a screen display. To adjust the display output
on a Cisco AS5800, enter the
terminal length 2000
command instead.
5300-NAS>terminal length 0
Step 12
Generate traffic across the modem link. Force the answering modem (in the NAS) to send a data steam
to the client modem. The data stream generated by the
show modem log
command is about 1 MB.
The data should scroll freely for one or two minutes.
5300-NAS>show modem log
Modem 1/0 Events Log:
2d09h :Startup event:MICA Hex modem (Managed)
Modem firmware = 2.7.1.0
2d09h :RS232 event: noRTS, noDTR, CTS, noDCD
2d09h :RS232 event: noRTS, DTR, CTS, noDCD
2d09h :RS232 event: RTS, DTR, CTS, noDCD
2d09h :RS232 event: noRTS, DTR, CTS, noDCD
2d09h :RS232 event: noRTS, noDTR, CTS, noDCD
2d09h :RS232 event: noRTS, DTR, CTS, noDCD
2d09h :RS232 event: RTS, DTR, CTS, noDCD
. . .
Snip
Step 13
Look at the modem’s operational statistics and verify that you have acceptable speed, line shape, and
throughput. In this example, modem 1/2 accepts the call.
If you do not have a scroll bar in your telnet application, limit terminal length to 24 lines to see all the
command output.
If you are using Microcom modems, enter the
modem at-mode
slot
/
port
command followed by the
at@e1
command.
5300-NAS>show modem operational-status 1/2
Modem(1/2) Operational-Status:
Parameter #0 Disconnect Reason Info: (0x0)
Type (=0 ): <unknown>
Class (=0 ): Other
Reason (=0 ): no disconnect has yet occurred
Parameter #1 Connect Protocol: LAP-M
Parameter #2 Compression: V.42bis both
Parameter #3 EC Retransmission Count: 0
Parameter #4 Self Test Error Count: 0
Parameter #5 Call Timer: 597 secs
Parameter #6 Total Retrains: 0
Parameter #7 Sq Value: 4
Parameter #8 Connected Standard: V.34+
Parameter #9 TX,RX Bit Rate: 33600, 33600
Parameter #11 TX,RX Symbol Rate: 3429, 3429
Parameter #13 TX,RX Carrier Frequency: 1959, 1959