Write
IOS commands pertaining to troubleshooting DDR operation
The commands shown in Figure
can be used to troubleshoot DDR operation. You
troubleshoot SPID problems by using the debug
isdn q921 command. In
example output,
you can see that isdn
spid1 was rejected by the
ISDN switch. You check the status of the Cisco 700 ISDN line with
the show status
command, as shown in Figure .