[cisco-voip] Odd one-way/no audio issues with just one user

[Ryan Ratliff (rratliff)]

What do the CMR records say about those calls?  

-Ryan

On Sep 17, 2013, at 12:51 PM, Erick B. <erickbee at gmail.com> wrote:

Hi,

Anyone have any ideas on this?

Older system, CUCM 6.1.1a (no SUs) that has been running fine for years and past 2-3 months only one user is having problems with no audio or one way audio on calls. The IP Phone user can't hear the outside caller. External calls have issue mostly. Problem happens 1-2 times a day. 

We have replaced the 7962 phone, headset, put it in another switch port. Updated firmware to 8.5.2 (latest compatibile with 6.1 per docs). I have updated the IOS on the MGCP voice gateway from 12.4(15)T4 to 12.4(15)T17 and that fixed a duplicate DTMF issue (user was hearing DTMF tones on some calls) and also seemed to help the problem calls as there are less since the IOS upgrade but still 2-3 a day compared to a dozen or so before the IOS upgrade. 

I haven't been able to duplicate the issue with several hundred calls in, it is very sporadic. 

I know the CCM version is old, thinking about applying latest SUs for 6.1 until the client can update to newer hardware. Just strange only one user having this problem. We checked around several times. 
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