[Freeswitch-users] Annex B

Brian West brian at freeswitch.org
Tue May 4 15:19:22 PDT 2010

<action application="export" data="sip_append_audio_sdp=a=fmtp:18 annexb=no"/>


On May 4, 2010, at 5:11 PM, Ken Fulmer wrote:

> When we send calls to an Adtran gateway, our calls using g.729 work properly. I noticed in the SDP the following field:
> a=fmtp:18 annexb=yes
> When we send calls to a Cisco gateway, the same call fails.
> Inbound g.729 calls coming from the Cisco gateway work properly and I noticed the following:
> a=fmtp:18 annexb=no
> Is there a way to set this parameter in the dial-plan or sip profiles so we can match what the Cisco gateway is looking for?
> Thanks,
> Ken Fulmer
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