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<TITLE>Re: [cisco-voip] 7937 Packet Loss and intermittent voice quality issues</TITLE>
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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Ted,<BR>
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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 it’s not for a 7937). It seemed to work for us. We only have one 7937 and it’s used for several conference calls a week via Meetingplace Express. <BR>
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Matt<BR>
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On 1/5/10 12:39 PM, "Ted Nugent" <<a href="tednugent73@gmail.com">tednugent73@gmail.com</a>> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><FONT SIZE="1"><SPAN STYLE='font-size:8pt'>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.<BR>
No Duplex Mismatches<BR>
Cabling has been checked and device moved to new location with known good wiring<BR>
CUCM 7.1.2.21900-5<BR>
Any ideas?<BR>
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