Check this good wiki page for how FS negotiates codecs (early
negotiation default):
http://wiki.freeswitch.org/wiki/Codec_NegotiationI have this set in my internal profile:
<param name="codec-prefs" value="$${global_codec_prefs}"/>
and as stated before vars.xml:
<X-PRE-PROCESS cmd="set" data="global_codec_prefs=G729,PCMU,GSM"/>
<X-PRE-PROCESS cmd="set" data="outbound_codec_prefs=G729,PCMU,GSM"/>
Setting late negotiation works (thanks Sergey), but reading the wiki
page, I see the following sentence, which I interpret that GSM should
still be sent:
When FS calls leg B, the list of codecs in outbound-codec-prefs for
the SIP profile is reorganized by pushing the codec negotiated above
for leg A at the top . If B does not accept any of the codecs, the
calls fails, obviously.
On Wed, Jun 23, 2010 at 10:28 PM, Tony Graziano
<tgraziano@myitdepartment.net> wrote:
I'm a newb to fs, but doesn't codec get neogtiated by the endpoints?
Wouldn't fs only get involved when its media server is referred to?
If the "other endpoint" will only accept G729, doesn't that mean you
need to change that endpoint to also accept G711 or also license G729
in FS?
On 6/23/10, Mark Campbell-Smith <mcampbellsmith@gmail.com> wrote:
Test Setup:
vars.xml:
<X-PRE-PROCESS cmd="set" data="global_codec_prefs=G729,PCMU,GSM"/>
<X-PRE-PROCESS cmd="set" data="outbound_codec_prefs=G729,PCMU,GSM"/>
The call setup is extension 1000 calls extension 1020
1. Extension 1000 calls with preferred codec PCMU. PCMU is chosen by
FS as the A-leg codec
2. Extension 1020 only supports GSM codec. The call fails with Not
Acceptable Here.
FS only offers G729 and PCMU to 1020. How do I change the number of
codecs that are offered to an extension? I know I can change the
order in the codec_prefs, but would prefer FS to offer all three
codecs to an extension.
m=audio 23662 RTP/AVP 0 18 101 13
a=rtpmap:0 PCMU/8000
a=rtpmap:18 G729/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=rtpmap:13 CN/8000
a=ptime:30
Thanks
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