Hello I am using Sangoma A104DE with libss7 on Asterisk 11.5.0 and terminating calls to telco with ss7 . We are using patched version of Libss7 that have timers functionality.(https://issues.asterisk.org/jira/browse/SS7-27) The server is on production for the last 6 months and everything was fine ? My interconnection with telco is only one way. From sip to ss7 . Everything is fine except one thing. One of my customers asked for t38 faxing. then i found myself in trouble. I get several sip traces and found the problem ?at the end .When i receive an invite T38 , asterisk is sending 200 OK message but in SDP it is sending g711u,g711a,g729 as codecs. So after this point everything is messed up. I tried to set?t38pt_udptl=no in sip.conf , but still asterisk is sending sip 200 ok with sdp g711...? ? tried to set?t38pt_udptl = yes,redundancy,maxdatagram=400 and?setvar=FAXOPT(gateway)=yes,20 in sip.conf but still i couldn't manage to receive fax? So basically what i need to send fax from sip to telco but could not manage to do till now.? Everything except fax is working like a charm. Is anyone succeed to handle fax with libss7. I will be glad if an expert can show me ?a way to achive this. Best Regards -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.digium.com/pipermail/asterisk-ss7/attachments/20140822/8bcadbf4/attachment.html>