We use a freeswitch as a relay between our carriers and other freeswitches, it has worked great until we upgraded to the latest freeswitch version recently We we receive a fax, inbound and relay it, the subsequent re invite we get back looks like the frist block below, then when the freeswitch relays it, it adds in " Media Description, name and address (m): audio 0 RTP/AVP 19". The originating carrier sees this and responds with audio instead of T38, the call drops. Any hints would be greatly appreaciated, I do not really want to go back to a previous release if I can avoid it. Connection Information (c): IN IP4 98.158.137.200 Time Description, active time (t): 0 0 Media Description, name and address (m): image 18392 udptl t38 Media Attribute (a): T38FaxVersion:0 Media Attribute (a): T38MaxBitRate:14400 Media Attribute (a): T38FaxFillBitRemoval Media Attribute (a): T38FaxRateManagement:transferredTCF Media Attribute (a): T38FaxMaxBuffer:2000 Media Attribute (a): T38FaxMaxDatagram:400 Media Attribute (a): T38FaxUdpEC:t38UDPRedundancy Connection Information (c): IN IP4 98.158.137.200 Time Description, active time (t): 0 0 Media Description, name and address (m): audio 0 RTP/AVP 19 Media Description, name and address (m): image 18392 udptl t38 Media Attribute (a): T38FaxVersion:0 Media Attribute (a): T38MaxBitRate:14400 Media Attribute (a): T38FaxFillBitRemoval Media Attribute (a): T38FaxRateManagement:transferredTCF Media Attribute (a): T38FaxMaxBuffer:2000 Media Attribute (a): T38FaxMaxDatagram:400 Media Attribute (a): T38FaxUdpEC:t38UDPRedundancy Darcy Voice2Net