[cisco-voip] 7937 Packet Loss and intermittent voice quality issues

[Matthew Linsemier]

Ted,

I actually think we ran into a similar issue that you are having.  Our fix
was to hardcode the Voice VLAN through the administrative portal and
disabling CDP on the switchport.  Give this a try and let me know what you
find (I think there was a bug on this).

Matt


On 1/5/10 3:41 PM, "Ted Nugent" <tednugent73 at gmail.com> wrote:

> I actually cleared the port config on one of them with the exception of the
> voice and data vlan commands and they were still seeing the problem. To me it
> seems like an issue withe 7937 more so then a network issue because none of
> the other phones are being affected?
> 
> 
> 
> On Tue, Jan 5, 2010 at 2:08 PM, Mike Thompson <mthompson729 at gmail.com> wrote:
>> Or some sort of CDP / Spanning Tree weird thing going on.  Try turn off
>> portfast on those port and see if it helps.  Look at the QoS on the ports too
>> and check and see if there¹s any inconsistency.
>> 
>>  
>>  
>>  
>> 
>> From: cisco-voip-bounces at puck.nether.net
>> [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Ted Nugent
>> Sent: Tuesday, January 05, 2010 12:39 PM
>> To: Cisco VoIPoE List
>> Subject: [cisco-voip] 7937 Packet Loss and intermittent voice quality issues
>>  
>> I have a new customer install
>> 
>> with 8 sccp 7937s and all of them are experiencing the same problem.
>> Intermittently
>> throughout the call they continue to lose voice for 5-10 seconds and then it
>> clears back up for a few minutes and it occurs again. I can see on the web
>> statistics for the phone that it appears to be losing packets (Rcvr Lost
>> Packets  2483). This only appears to be occurring
>> inbound to the device since the caller does not hear and audio issues. These
>> devices
>> are deployed throughout the company and all are experiencing the same issues
>> at
>> times. There are a couple bugs for g729 and g722 but we¹re running g711 (g722
>> has been disabled clusterwide). They were experiencing the issue yesterday
>> and
>> I had the 7937 conference in a 7965 and the 7965 did not experience any voice
>> issues so it¹s not the call itself or callers phone. No other phones are
>> experiencing the issues and I¹ve upgrading the load from 1.3.3 to 1.3.4 and
>> the
>> problem still exists. Calls are hitting the PSTN via an MGCP controlled PRI
>> however I¹m not sure if that¹s in play or not we have not been able to
>> replicate the problem on internal calls but that¹s not to say it¹s not
>> occurring
>> because its intermittent.
>> No Duplex Mismatches
>> Cabling has been checked and
>> device moved to new location with known good wiring
>> CUCM 7.1.2.21900-5
>> Any ideas?
>> 
>> 
>> 
> 
> 
> 
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