Good evening, I noticed Bryan's thread on "BEHAVIOR CHANGE (YES PAY ATTENTION TO THIS IFYOU USE FAXING)" but still having issues. I'm running FreeSWITCH Version 1.6.14+git~20170130T165359Z~e9cb966d18~64bit (git e9cb966 2017-01-30 16:53:59Z 64bit) When a G711 call comes in and then the reinvite occurs from the calling side for T38; FS sends back a "488 Not Acceptable Here" I have set this in vars.xml per the suggestion: <X-PRE-PROCESS cmd="set" data="fax_enable_t38=true"/> Below is the pastebin of the siptrace: http://pastebin.com/hjnhEqym Below is the dialplan for it: <action application="answer" /> <action application="playback" data="silence_stream://2000"/> <action application="set" data="fax_enable_t38=true"/> <action application="rxfax" data="/tmp/FAX-${uuid}.tif"/> <action application="hangup"/> Am I missing anything else to just make this work? Thanks! andy....