Specifications

4-11
Cisco AS5x00 Case Study for Basic IP Modem Services
11/24/1999
Section 4 Verifying Modem Performance
Initiating a Modem Loopback Test Call
Step 1
From a workstation, open two telnet sessions into the NAS. One telnet session is used to simulate the
client. The other session is used to administer and run the debugs. In this way, the debug messages will
not be scrambled into the loopback screen display. Figure 4-7 shows an example of this.
Figure 4-7 Opening Two Telnet Sessions
Step 2
Configure the lines to support dial in, dial out, and outbound telnet connections:
!
line 1 96
modem inout
transport input telnet
!
Step 3
From the administrative telnet session, turn on the appropriate debug commands. Older software might
require the
debug modem csm
command.
5300-NAS#debug isdn q931
ISDN Q931 packets debugging is on
5300-NAS#debug csm modem
Modem Management Call Switching Module debugging is on
5300-NAS#debug modem
Modem control/process activation debugging is on
5300-NAS#show debug
General OS:
Modem control/process activation debugging is on
ISDN:
ISDN Q931 packets debugging is on
ISDN Q931 packets debug DSLs. (On/Off/No DSL:1/0/-)
DSL 0 --> 7
1 1 1 - - - - -
28056
5300-NAS# 5300-NAS#
Client telnet session Administrative telnet session
running debugs