<br><div class="gmail_extra"><div class="gmail_quote">On Thu, Nov 8, 2012 at 8:47 AM, Richard Mudgett <span dir="ltr"><<a href="mailto:rmudgett@digium.com" target="_blank">rmudgett@digium.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="HOEnZb"><div class="h5">> I'm testing out a server with asterisk 1.8.15.0 on it.<br>
> I'm experiencing static occurring on almost 90% of calls on this<br>
> particular server.<br>
> All test phones are using SIP, and calls to/from PSTN servers are<br>
> delivered using IAX2.<br>
><br>
><br>
> I have other production servers running 1.4.x that do not have this<br>
> issue that use the same PSTN connections.<br>
> I haven't seen any ethernet errors or anything like that. Load is<br>
> minimal since this is still a test server.<br>
> The server itself has 16GB of RAM and Dual Quad Core Xeon E5345s.<br>
><br>
><br>
> I'm sort of baffled as to where to start looking for the root cause<br>
> of this issue, but it appears to be isolated to only this machine.<br>
<br>
</div></div>You might have an A-law/u-law mismatch in the audio path. That<br>
kind of mismatch sounds like static on the line.<br>
<br></blockquote><div><br></div><div>Hmm, would translation from ulaw -> gsm cause that as well?</div><div>I noticed in 1.8 apparently iax2 allow=ulaw is off...</div><div><br></div><div>-- James</div></div></div>