Hi, I know that faxing over SIP can be source of a whole lot of issues, but I am wondering if someone had the same that I am currently running into. I have a softphone (Zoiper) sending a fax (TIFF image sent to a physical fax on PSTN) through a SIP platform with freeswitch / kamailio which is forwarding the fax to my PSTN Gateway (telcobridges TMG800), the fax is detected as T38 and everything looks good, except that it ends with (88) INCOMPATIBLE_DESTINATION Does anyone has an idea what might cause this and what could help resolve the issue ? I can send the trace if you email me. Any help appreciated. Thank you, Tanguy -- *Tanguy DANGELSER* R?sidence petit Chalet ? Ch?ton 56 avenue Louis Pasteur ? 97300 CAYENNE Guyane Fran?aise ? French Guiana T?l : +594 (0) 594 25 00 00 - Fax : +594 (0) 594 25 37 85 <https://fr-fr.facebook.com/guyacom> <http://hu.linkedin.com/company/guyacom> <service.technique at guyacom.fr> <http://www.youtube.com/user/GUYACOM> <http://www.guyacom.net/>