Hello Actually it will be fine? If I can send sip 488 not acceptable here to the re invite of t38 . But? Asterisk is sending sip 200 ok with voice codecs in SDP. So if i was able to send sip 488 . The fax will contunie with g711 Setting faxopt(gateway)=yes and t38pt_udptl = yes,redundancy,maxdatagram=400 didnt work. By setting these asterisk should send sip 200 with SDP T38 but it is still sending speech codec(g11u,etc..)? in SIP 200 sdp. Also disabling? t38 with t38pt_udptl=no didnt change anything. Regards -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.digium.com/pipermail/asterisk-ss7/attachments/20140822/79f71271/attachment-0001.html>