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VOIP Phone Continously "Registering"

Please help.

We use Callmanager 3.2 with a publisher and two subscribers. 90% of phones are 7940's with some 7960's too.

More often these days, when people try to login (using extension mobility) the phone will prompt "REGISTERING" this message is continuously shown.

Replacing the phone will alleviate the problem, but we are building up a selection of problematic phones.

Is there a resolution or something we should be doing on our Callmanager cluster as a method of maintenance etc.

Kindest Regards..

Kai Nicholls


Re: VOIP Phone Continously "Registering"

Is it getting the IP address? Is it able to contact the CallManager? Was there any recent CCM upgrade, if so, the firmware for that phone should be available on the new CCM after upgradation. If firmware is already available and inspite of it , it is cycling in the Registering states, then it could be due to the CCM configuration. Try stopping and starting the TFTP and CCM on the Servicabbility and Control Center. This should help it to work.

Cisco IP Phone Model 7960G, 7940G, and 7910 Administration Guide for Cisco CallManager Release 3.3 and later


Re: VOIP Phone Continously "Registering"

Sounds similar to the bug: CSCea14801

IP phone reset twice after Extension Mobility user login successfull

If you are hitting this bug, then unfortunately there is no workaround and the bug tool doesn't say on which version this is fixed. You might want to open a TAC case.