I am facing a bizarre behavior while trying to send fax from zoiper to freeswitch. First, i tried to use the dialplan example as shown in documentation page. <extension name="fax_receive"> <condition field="destination_number" expression="^9978$"> <action application="answer" /> <action application="playback" data="silence_stream://2000"/> <action application="set" data="fax_enable_t38_request=true"/> <action application="set" data="fax_enable_t38=true"/> <action application="rxfax" data="/tmp/FAX-${uuid}.tif"/> <action application="hangup"/> </condition> </extension> But this resulted in "488 Not Acceptable Here" even though i have set fax_enable_t38 in vars.xml Logs. *https://pastebin.freeswitch.org/view/07224882 <https://pastebin.freeswitch.org/view/07224882>* Second, But i remove few lines from dialplan. <extension name="fax_receive"> <condition field="destination_number" expression="^9978$"> <action application="answer" /> <action application="rxfax" data="/tmp/FAX-${uuid}.tif"/> <action application="hangup"/> </condition> </extension> Everything seems to work perfectly. Third. When i insert a small lua script after answer in above dialplan it again fails with 488. <extension name="fax_receive"> <condition field="destination_number" expression="^9978$"> <action application="answer" /> <action application="lua" data="jack.lua"/> <action application="rxfax" data="/tmp/FAX-${uuid}.tif"/> <action application="hangup"/> </condition> </extension> I just want to run a small lua script before i call rxfax application. Any help would be much appreciated. Best Regards. <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon> Virus-free. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>