Test Setup: vars.xml: <X-PRE-PROCESS cmd="set" data="global_codec_prefs=G729,PCMU,GSM"/> <X-PRE-PROCESS cmd="set" data="outbound_codec_prefs=G729,PCMU,GSM"/> The call setup is extension 1000 calls extension 1020 1. Extension 1000 calls with preferred codec PCMU. PCMU is chosen by FS as the A-leg codec 2. Extension 1020 only supports GSM codec. The call fails with Not Acceptable Here. FS only offers G729 and PCMU to 1020. How do I change the number of codecs that are offered to an extension? I know I can change the order in the codec_prefs, but would prefer FS to offer all three codecs to an extension. m=audio 23662 RTP/AVP 0 18 101 13 a=rtpmap:0 PCMU/8000 a=rtpmap:18 G729/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=rtpmap:13 CN/8000 a=ptime:30 Thanks