Hello all When server send list of codec in INVITE: a=rtpmap:0 PCMU/8000 a=rtpmap:3 GSM/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:112 AAL2-G726-32/8000 a=rtpmap:5 DVI4/8000 a=rtpmap:10 L16/8000 a=rtpmap:7 LPC/8000 a=rtpmap:102 speex/8000 a=rtpmap:111 G726-32/8000 and in my application is list of codec defined as: a=rtpmap:3 GSM/8000 a=rtpmap:112 L16/48000/2 a=rtpmap:111 L16/48000 a=rtpmap:110 L16/32000/2 a=rtpmap:109 L16/32000 a=rtpmap:108 L16/16000/2 a=rtpmap:107 L16/16000 a=rtpmap:106 L16/8000/2 a=rtpmap:105 L16/8000 a=rtpmap:10 L16/44100/2 a=rtpmap:11 L16/44100 a=rtpmap:9 G722/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:113 iLBC/8000 a=fmtp:113 mode=30 a=rtpmap:104 speex/32000 a=rtpmap:102 speex/8000 a=rtpmap:103 speex/16000 My application do not select first aplication codec a=rtpmap:3 GSM/8000 but first server codec a=rtpmap:0 PCMU/8000 Exists some way how can i set pjsip stack for selecting first codec from client and not from server? I want prefer list of codecs from my application. thanks