Sound card theory sounds pretty convincing. Most of the voice software has rules about dropping packets it received it can't use, so the problem in theory should be isolated to the endpoints. If you do a 'show call active voice brief' it has a field for lost/early/late packets. The late and early packets indicated packets that were not usable because they came at the wrong time. I've never heard of anything like this on a cisco hard phone. If it is a hard phone, I would try other firmware versions. The QOS theory holds water, but I just don't visualize something playing it back incorrectly. I've seen this doing DSP captures, but that's a pretty different game.<br>
<br>-nick<br><br><div class="gmail_quote">On Mon, Aug 23, 2010 at 5:16 PM, Norton, Mike <span dir="ltr"><<a href="mailto:mikenorton@pwsd76.ab.ca">mikenorton@pwsd76.ab.ca</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div link="blue" vlink="purple" lang="EN-CA">
<div>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">In my non-work life I pretend to do some audio stuff, and I have
seen symptoms like that when the soundcard can’t decide what sample rate
it’s supposed to run at. For example, if the driver wants to force to the
hardware to a particular sample rate, but a device connected to the optical
input is providing clocking at a different rate. Or if multiple applications
are trying to control the sample rate instead of letting the driver convert
their signals to something common.</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">I would try to confirm whether it is a soundcard issue or a
network traffic issue before wandering too deeply down either troubleshooting
path.</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">-- </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Mike Norton</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">I.T. Support</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Peace Wapiti School Division No. 76</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Helpdesk: 780-831-3080</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Direct: 780-831-3076</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<div style="border-width: 1pt medium medium; border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; padding: 3pt 0cm 0cm;">
<p class="MsoNormal"><b><span style="font-size: 10pt;" lang="EN-US">From:</span></b><span style="font-size: 10pt;" lang="EN-US"> <a href="mailto:cisco-voip-bounces@puck.nether.net" target="_blank">cisco-voip-bounces@puck.nether.net</a>
[mailto:<a href="mailto:cisco-voip-bounces@puck.nether.net" target="_blank">cisco-voip-bounces@puck.nether.net</a>] <b>On Behalf Of </b>Scott Voll<br>
<b>Sent:</b> August-23-10 3:02 PM<div class="im"><br>
<b>To:</b> <a href="mailto:cisco-voip@puck.nether.net" target="_blank">cisco-voip@puck.nether.net</a><br>
<b>Subject:</b> [cisco-voip] talking normally then way fast</div></span></p>
</div>
<p class="MsoNormal"> </p>
<p class="MsoNormal">This has got us stumped.</p><div><div></div><div class="h5">
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">CM 4.2 and Softphone user from home over VPN.</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">User calls because she is having soft phone issues.
Leave us a VM. for about 25 seconds the vm is normal speed.
Then the last few seconds are condensed into 1 sec.</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">Call her back. Real time audio has some of the same
issues. Talking fine, then dead air and then a super fast talk.</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">Seems like maybe there is some kind of software on her box
that is storing and forwarding packets. Anyone else ever see this?</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">I would be happy to forward off line to hear it. We
are idealess.</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">Thanks</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">Scott</p>
</div>
</div></div></div>
</div>
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<br></blockquote></div><br>