You can control silence suppression support for G729 codec using this
parameter.
Please refer RFC 4856 Section 2.1.9

Regrads,
Asim Sulaiman

-----Original Message-----
From: sip-implementors-boun...@lists.cs.columbia.edu
[mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of bidhu
biswal
Sent: Thursday, August 31, 2017 1:40 PM
To: sip-implementors@lists.cs.columbia.edu
Subject: [Sip-implementors] SDP Payload Format

Hi All,

                    I would like to know more about  annexb=yes and
annexb=no  with respect to G729A and G729  AB .

What is the purpose of   annexb=yes  n annexb=no .


Please share me more in  details .



Thanks,

Bidhu
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