Hello, I am doing some codec negotiation (early) tests but FS does not work as I expected. I can read at wiki: "When FS calls leg B, the list of codecs in outbound-codec-prefs for the SIP profile is reorganized by pushing the codec negotiated above for leg A at the top. If B does not accept any of the codecs, the calls fails, obviously" Codec prefs setted as: <X-PRE-PROCESS cmd="set" data="global_codec_prefs=G729,G7221@32000h ,G7221@16000h,G722,PCMU,PCMA,GSM"/> <X-PRE-PROCESS cmd="set" data="outbound_codec_prefs=G729,PCMU,PCMA,GSM"/> FS select PCMA for A leg FS offers following SDP to B leg: v=0 o=FreeSWITCH 1365781615 1365781616 IN IP4 176.31.117.49 s=FreeSWITCH c=IN IP4 176.31.117.49 t=0 0 m=audio 19780 RTP/AVP 8 101 13 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=ptime:30 m=audio 19780 RTP/AVP 18 0 8 3 101 13 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=ptime:20 Session progress from B leg contains: v=0 o=root 3311 3311 IN IP4 91.192.110.234 s=session c=IN IP4 91.192.110.234 t=0 0 m=audio 16194 RTP/AVP 18 8 0 101 a=rtpmap:18 G729/8000 a=fmtp:18 annexb=no a=rtpmap:8 PCMA/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - a=ptime:20 a=sendrecv FS codec comparison debug look as: sofia_glue.c:5094 Audio Codec Compare [G729:18:8000:20:8000]/[PCMA:8:8000:30:64000] sofia_glue.c:5094 Audio Codec Compare [G729:18:8000:20:8000]/[G729:18:8000:20:8000] sofia_glue.c:3077 Set Codec sofia/external/0034950004588 G729/8000 20 ms 160 samples 8000 bits FS start comparing G729 instead PCMA selected in A leg Is that ok? is there any way to get selected PCMA for B leg without using late negotiation nor disabling transcoding Regards