<div>Dynamic codecs are indicated by the a=rtpmap lines. Those lines may the number used on m=audio to the description of the codec.</div><div><br></div><div>All static payload types *may* be overriden to another codec using a=rtpmap lines, but usually aren't. If they're not overridden, they use the values on the page you already found.</div>
<div><br></div><div>Note a=rtpmap lines are optional for static payload types. That does cause problems on SIP clients that failed to read that part of the standard, so for those set verbose_sdp=true on the channel. That then means your SDP is larger and may give problems where packets are too large and get fragmented, which SIP/UDP doesn't handle very well.</div>
<div><br></div><div>-Steve</div><br><br><div class="gmail_quote">On 23 June 2013 04:23, Nathan Neulinger <span dir="ltr"><<a href="mailto:nneul@mst.edu" target="_blank">nneul@mst.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I think this may be what you're looking for...<br>
<br>
<a href="http://www.iana.org/assignments/rtp-parameters/rtp-parameters.xml" target="_blank">http://www.iana.org/assignments/rtp-parameters/rtp-parameters.xml</a><br>
<br>
96+ are dynamic apparently<br>
<br>
0, 8 pcmu and pcma<br>
3 is gsm<br>
<br>
At least according to that list... I don't know enough about the protocol to know how the dynamic ones are assigned.<br>
<br>
This that's odd though is that the list on that page is in decimal, with comfort noise at 13. That would make sense if<br>
it were in hex (19), so maybe I'm misinterpreting.<br>
<br>
-- Nathan<br>
<div><div class="h5"><br>
On 06/22/2013 10:02 PM, Sayyed Mohammad Emami Razavi wrote:<br>
> m=audio 5016 RTP/AVP 96 3 107 110 0 8 101.<br>
> Is there any digits represents sip codecs in subject?!<br>
><br>
> Can any body describe this statement?!<br>
><br>
> For example in response to one of my questions, Steven told me:<br>
> "Your phone is not offering any codecs in the INVITE:<br>
> m=audio 15696 RTP/AVP 19<br>
> The only payload type listed is 19 (comfort noise) - there are no codecs listed."<br>
> base on my logs: <a href="http://pastebin.freeswitch.org/21084" target="_blank">http://pastebin.freeswitch.org/21084</a><br>
<br>
</div></div>--<br>
------------------------------------------------------------<br>
Nathan Neulinger <a href="mailto:nneul@mst.edu">nneul@mst.edu</a><br>
Missouri S&T Information Technology <a href="tel:%28573%29%20612-1412" value="+15736121412">(573) 612-1412</a><br>
System Administrator - Architect<br>
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