we need to determine how/why the B-channels are out of service. NFAS B-channels can be taken out of service by the remote end. "Show isdn service detail" might help.
Also, a q.931 debug trace of the dsl after shutting down/no shutdown of the serial interface would show service messages that should bring the B-channels IN_SERVICE.If there is a misconfiguration between the switch and the router (DSL or
nfas_int), the B-channels would not be brought into service by the switch. (The router sends service messages for each B-channel (IN_SERVICE), and places the B-channel in service when/if it receives an IN_SERVICE service
These are the paths to get to each CCX logs through CLI. They may be helpful if you are having issues accessing RTMT or downloading logs through it.
If you want to download them you have to prefix "file get " and you can add one of the options (re...