[cisco-voip] UCS C series audio issues

[Brian Meade (brmeade)]

What full CUCM version are you running?

You're probably hitting CSCtz29142-VMware CUCM Media resources introduces jitter causing bad voice quality.

If you get a packet capture from CUCM for one of the calls using a software resource.  check the Delta values for the RTP stream in Wireshark.  If you're hitting this bug, delta will swap back and forth between 16ms and 24ms.  It should be a constant delta of 20ms in a working scenario.

Thanks,
Brian Meade

From: cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Erick Bergquist
Sent: Wednesday, February 12, 2014 2:19 PM
To: voip puck
Subject: [cisco-voip] UCS C series audio issues

Has anyone experienced choppy/garbled/broken-up audio for MoH, conference calls or MTP audio from UC Servers on UCS C series?  All software based (IPVMS).

The network side is fine, QoS and no errors on the switch ports. The CPU load is minimal and CM performance minimal also, so no CPU pegging.

Thanks,
Erick

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