CME 8 and 3945 router IOS 15.1.1 T

Unanswered Question
Aug 11th, 2010

we are experiencing random phones that unregister with following error in log:

089919: Aug  5 15:31:18 EDT: %IPPHONE-6-UNREGISTER_ABNORMAL: ephone-60:SEP0026CBCXXXX IP:X,X.X.X Socket:168 DeviceType:Phone has unregistered abnormally.

we have been chasing our tails on this. network is saying its the router , CME team is saying its a network issue.

i did find this bug but its on a 3825 router with same IOS and CME version


Symptoms: Cisco IP phone users may experience dropped calls, resetting phones, and one-way audio.

Conditions: These symptoms are observed on a Cisco 3825 router that is running Cisco IOS Release 15.1(1)T and CME 8.0 when there are 4 or more active calls. The symptoms occur with the following topology:

<span style="color: black; font-size: 10pt; font-family: Courier New; ">Router/ PBX ---pri---- CISCO3825 ----sccp---- ip phone.</span>

It is a normal external call: PSTN <-----> IP phone calls.

Workaround: Install Cisco IOS Release 12.4(15)XZ2 or another release earlier than Release 15.n.

I have this problem too.
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Matthew Kaufman Mon, 08/16/2010 - 11:36

I would recommend opening a TAC case and referecing the defect you think you're experiencing.  You should be able to work with the assigned engineer to resolve the issue.



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