[Freeswitch-users] Number of codecs offerred in SDP

[David Ponzone]

Mark,

I confirm that, as I wrote that wiki page (the early negotiation  
part) :)

Can you really confirm your FS version ?
The parameter you showed is old.
codec-prefs has been replaced in SIP profiles by:

     <param name="inbound-codec-prefs" value="$${global_codec_prefs}"/>
     <param name="outbound-codec-prefs" value="$$ 
{outbound_codec_prefs}"/>

David Ponzone  Direction Technique
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Le 23/06/2010 à 14:43, Mark Campbell-Smith a écrit :

> Check this good wiki page for how FS negotiates codecs (early
> negotiation default):
> http://wiki.freeswitch.org/wiki/Codec_Negotiation
>
> I 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 at 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 at 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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>>
>> --
>> Sent from my mobile device
>>
>> ======================
>> Tony Graziano, Manager
>> Telephone: 434.984.8430
>> sip: tgraziano at voice.myitdepartment.net
>> Fax: 434.984.8431
>>
>> Email: tgraziano at myitdepartment.net
>>
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>> Fax: 434.984.8427
>>
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>>
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>>
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>
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