[asterisk-users] g729a compatibility

[Kevin P. Fleming]

Elliot Murdock wrote:
> Hello!
> 
> I have a sip device that is sending in the SDP:
> 
> rtpmap:98 g729a
> 
> It does not seem like Asterisk is negotiating the codec properly,
> because while the call rings, the rtp lines fail.  However, on other
> sip devices that have "rtpmap:18 g729" in their SDP, things work fine
> with Digium's commercial g729 license.
> 
> How do I get "98 g729a" recognized by Asterisk?

You don't. That's not a standards-compliant way of reporting G.729A in
SDP. The RFC says it should be 'G729', but Asterisk also accepts 'G.729'
and 'G729A'. It does not accept any lowercase form of the codec name.

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
skype: kpfleming | jabber: kpfleming at digium.com
Check us out at www.digium.com & www.asterisk.org