Hi, I got an issue using G729A codec: Call 1: Linksys’ SDP: Media Attribute (a): fmtp:96 0-15 Media Attribute (a): ptime:30 Media Attribute (a): rtpmap:18 G729/8000 Media Attribute (a): rtpmap:96 telephone-event/8000 Media Attribute (a): sendrecv
Sipxtapi ’s SDP: Media Attribute (a): rtpmap:18 g729/8000/1 Media Attribute (a): fmtp:18 annexb=no No Audio (encoding / decoding level) /**********************************/ Call 2: Asterisk’s SDP: Media Attribute (a): fmtp:18 annexb=no Media Attribute (a): fmtp:96 0-16 Media Attribute (a): rtpmap:18 G729/8000 … Sipxtapi ’s SDP: Media Attribute (a): rtpmap:18 g729/8000/1 Media Attribute (a): fmtp:18 annexb=no Audio okay (g729) - worked and removing "Media Attribute (a): fmtp:18 annexb=no" results *No* Audio with Asterisk. and audio (ok) with linksys /**********************************/ So that I managed SdpDefaultCodecFactory to show: Sipxtapi ’s SDP: Media Attribute (a): rtpmap:18 g729/8000/1 Media Attribute (a): rtpmap:18 g729/8000/1 Media Attribute (a): fmtp:18 annexb=no And to “fix” incompatibility issues with other implementations Audio is Ok in both scenarios now Paulo
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