I used to use hylafax for many years - most of the problems had to do with the modem software - not hylafax. Once I had the right FAX modem I had close to 100% successes( It was one of about 25 external faxmodems/firmware combinations that I tried). Using hylafax with VoIP via an audio card did not bring much joy.. so I am now using: <condition field="destination_number" expression="^33$"> <!-- The following sort of works--> <action application="set" data="file=/home/freeswitch/fax/${strftime(%Y-%m-%d_%H-%M-%S)}.tif"/> <action application="playback" data="silence_stream://2000"/> <action application="set" data="fax_enable_t38_request=false"/> <action application="set" data="fax_enable_t38=false"/> <action application="rxfax" data="${file}"/> <action application="system" data='echo "See attached FAX" | mutt -a ${file} -s "FAX" -- fax@example.com' /> <action application="hangup" /> <action application="set_zombie_exec"/> </condition> I too am missing some faxes - some folks have to retry. My testing seems to suggest that it has to do with the sending fax machine more than it being a VoIP connection. I also have <action application="spandsp_start_fax_detect" data="transfer '33 XML features' 6"/> And some fax calls fail to transfer - but not often. @ Bruce - As per: fax_disable_v17 = true fax_enable_t38 = true fax_enable_t38_request = true fax_verbose = true ignore_early_media = true Can you explain what you think each line above might be doing for INBOUND faxes? In the long run, I can't wait till we can say RIP to all FAXes, but it might be good to collect some statistics on which FAX settings have the best success - and your scripts so that spansp faxing can be improved. The problem I've had in debugging this is I only have a few old FAX machines to test with - one really needs a huge volume of FAX calls coming in or a huge collection of machines to test with. Your large volume of incoming FAX calls could produce some useful statistics.. -- -------------------------------------------------------------------------------- Karl Schmidt EMail Karl@xtronics.com Transtronics, Inc. WEB http://xtronics.com 3209 West 9th Street Ph (785) 841-3089 Lawrence, KS 66049 FAX (785) 841-0434 History may not repeat itself, but it does rhyme a lot. -Mark Twain --------------------------------------------------------------------------------