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

[Matthew Linsemier]

Ted,

Did you ever try removing CDP on the port and then hard coding the VLAN on
the 7937 phone through the admin portal?   I think we did this based on a
few bugs: CSCsu65069 and CSCsu47079 (even though it¹s not for a 7937).  It
seemed to work for us.  We only have one 7937 and it¹s used for several
conference calls a week via Meetingplace Express.

Matt


On 1/5/10 12:39 PM, "Ted Nugent" <tednugent73 at gmail.com> wrote:

> 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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