Hi Philip,<br>So i looked at the codecs in the device (polycom) it says only G.711 and ulaw can be used, i made an internal call using two phones that are configured just with sip (so IAX not involved) but the static noise is there, i typed show sip peer <username> and this is the only thing i got:<br>
Codecs : 0x8000e (gsm|ulaw|alaw|h263)<br> Codec Order : (none)<br>it should be some commands that can give me a better idea about the codecs, if anyone know them, please help!<br><br><div class="gmail_quote">2010/3/25 Philipp von Klitzing <span dir="ltr"><<a href="mailto:klitzing@pool.informatik.rwth-aachen.de">klitzing@pool.informatik.rwth-aachen.de</a>></span><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi!<br>
<div class="im"><br>
> i have recently connected my (working) asterisk 1.2 server, with two<br>
> 1.4 asterisk servers (one using SIP the other using IAX), since then<br>
> (i believe) people starts complaining about a high background noise<br>
<br>
</div>The best idea is probably to start out by looking at the codecs. If you<br>
happen to have either gsm or g726 somewhere along your media path then I<br>
would strongly suggest you start to get rid of them so see if that<br>
eliminates the issue. g726 is one big mess, and gsm had some compiler<br>
issues in the past.<br>
<br>
The next thing to look at is if the issue only appears when IAX is<br>
involved.<br>
<br>
Maybe looking at the Polycom firmware, and release notes in particular<br>
(no clue how detailed those are), would also be a good idea.<br>
<font color="#888888"><br>
Philipp<br>
</font><div><div></div><div class="h5"><br>
<br>
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