Dvir,
The SDP media attributes for silence suppression have been defined in
RFC3108, section 5.6.3.2: for e.g. "a=silenceSupp: on 1 standard -" ;
this solves one part of your question.
For the rtp/avp profile question, you may want to look at:
http://search.ietf.org/internet-drafts/draft-ietf-avt-profile-new-10.txt

Jean-Francois.

> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Dvir Oren
> Sent: Thursday, June 07, 2001 12:51 PM
> To: SIP Implementors
> Subject: [Sip-implementors] 729 Annex B
>
>
> I can find no reference to Annex B negotiation of payload 18:  G729.
> How can I know whether the other end supports Annex B (silence
> suppression) or does not?
>
> It seems like payload 18 is used for either one of them.  I can find
> no SDP parameter that is relevant for this.
>
> Any ideas?
>
> --
> Dvir Oren               <[EMAIL PROTECTED]>
> Lucid Voice Ltd.   <http://www.lucidvoice.com>
> 5 Jabotinski St., Ramat-Gan, 52520      Israel
> Tel: 972 3 5757488          Fax: 972 3 5757499
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