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

[Mike Thompson]

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 there's 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 we're 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 it's not the call itself or callers phone. No other phones are

experiencing the issues and I've 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 I'm not sure if that's in play or not we have not been able to

replicate the problem on internal calls but that's not to say it's 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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