Malfuncting IP Phone

Unanswered Question
Aug 1st, 2010

I have a Cisco 7931 IP Phone that does not register. on the process of registering the phone reboots automatically and hangs.

what can ido about this ?

I have this problem too.
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Adam Frankel Sun, 08/01/2010 - 20:09

Have you tried allowing auto registration?  There is probably some parameter configured incorrectly.  If you don't want to turn on auto registration, you can collect a packet capture from the phone and CCM traces to see what is going on.

Phone Packet Capture:

CCM Traces:

There is also the off chance that it is a bad phone, try swapping in another phone of the same model and firmware version in the same switch port, if that one works fine and the broken phone stays broken on a 'known good' switchport, then open a TAC Service Request to see if the phone needs an RMA.


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