[SIPForum-discussion] Codec selection with SIP

[Eric Burger]

Often the codec selection by the UAS, not in priority of UAC, is UAS  
policy enforcement.

On Jun 2, 2008, at 9:27 PM, Yuantao Zhang wrote:

>
> I think Raj is right. For my experience, UAS respects itself more  
> than UAC. UAS will choose one codec according to its own priority.  
> But is there any standard for this? Or just most software engineers  
> prefer this?
>
>
> -----Original Message-----
> From: Raj Jain [mailto:rj2807 at gmail.com]
> Sent: 2008年5月31日 2:36
> To: José Antonio García Flores
> Cc: discussion at sipforum.org
> Subject: Re: [SIPForum-discussion] Codec selection with SIP
>
> You've not shown an SDP offer/answer exchange. But, assuming that A is
> the offerer and presents g711, g729 (in that order) and that B is the
> answerer (that would prefer to have the call setup on g729), then
> it'll put g729 *only* in its answer. That way, the agreed upon codec
> for the session will be g729.
>
> --
> Raj Jain
>
> On Fri, May 30, 2008 at 9:00 AM, José Antonio García Flores
> <joseantonio.garcia at corp.ya.com> wrote:
>> Hi,
>> We want to know how codec is selected in SIP calls, i mean , if A  
>> party has
>> priority over B party.
>> For example:
>> A party:
>>  codec 1 = g711
>>  codec 2 = g729
>> B party:
>>  codec 1 = g729
>>  codec 2= g711
>>
>> At the end, which codec is selected? -> g711?
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>
>
>
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