I've seen this problem once before but cant remember how to solve it.
I'm running a 2851 as a h323 gateway connected to an E1. when i run 'debug isdn q931' i'm not seeing the output although i know for a fact calls are going in and coming out. i'm connected via console which monitors so term mon is not needed but i'm sure there is a logging command or something that then makes the output be shown.
just cant remember...can anybody help??
It is possible (but in my experience less likely) for the same issues to impact debug output to telnet sessions. Someone could have changed the severity level or could have disabled logging to the monitor (which is what sends output to telnet sessions). For telnet the command is simmilar (but not quite the same):
logging monitor debug
One way to check things is to issue the show log command. In the first group of lines displayed it should show the various logging destinations and how they are set (console logging, buffer logging, and trap logging). It should show what is enabled and what is disabled and what severity level is set for each.