Information Technology Reference
In-Depth Information
For more complete information about ISDN codes and values, refer to the “ISDN Switch Codes and
Values” chapter in the
Cisco IOS Debug Command Reference
for your version of IOS, in print or online
at www.cisco.com/univercd/home/home.htm.
CAS Outbound Calling
For outbound calling via CAS T1 or E1 and integrated digital modems, much of the troubleshooting is
similar to other DDR troubleshooting. (The same holds true for outbound integrated modem calls over
a PRI line.) The unique features involved in making a call in this manner require special debugging in
the event of a call failure.
As for other DDR situations, you must ensure that a call attempt is demanded—
debug dialer events
is
useful for this (see the section “Verifying Dialer Operation,” earlier in this chapter).
Before a call can be placed, a modem must be allocated for the call. To view this process and the
subsequent call use the following
debug
commands:
debug modem
debug modem csm
debug cas
Note
: The
debug cas
command first appeared in IOS version 12.0(7)T for the AS5200 and AS5300.
Earlier versions of IOS use a system-level configuration command
service internal
along with the exec
command
modem-mgmt debug rbs
:
Turning On the Debugs
router#
conf t
Enter configuration commands, one per line. End with CNTL/Z.
router(config)#
service internal
router(config)#
^Z
router#
modem-mgmt csm ?
debug-rbs enable rbs debugging
no-debug-rbs disable rbs debugging
router#
modem-mgmt csm debug-rbs
router#
neat msg at slot 0: debug-rbs is on
neat msg at slot 0: special debug-rbs is on
Turning Off the Debugs
router#
router#
modem-mgmt csm no-debug-rbs
neat msg at slot 0: debug-rbs is off
Debugging this information on an AS5800 requires connecting to the trunk card itself.
