Grandstream GXW4104 FXO gateway, firmware version 188.8.131.52, with 3 POTS lines connected.
Admin->Module Admin shows that Fax Configuration 184.108.40.206 from Schmoozecom is installed and enabled.
The objective is to be able to receive faxes over the normal voice lines and email them to a recipient. As best I can determine this should be supported by Asterisk/FreePBX out of the box without a need for Hylafax or FFA or other. Fax Configuration 220.127.116.11 from Schmoozecom is installed and enabled.
Did the following:
In Settings->Asterisk SIP Settings, set T38 Pass-Through to Yes. However I believe this only affects receiving fax over IP and sending the fax to a fax machine. As best I can tell T.38 is not used to just receive a fax within Asterisk (right?). I just want to receive the fax and have it emailed to the recipient as a PDF or TIF or whatever.
In Applications->Extensions->my extension, checked Fax = Enabled, and put my email address in Fax Email.
In Connectivity->Inbound Routes, selected one of my incoming phone lines, set Detect Faxes = Yes, Fax Detection Type = SIP, Fax Detection Time = 4 (default), and Fax Destination to the Fax Recipient I set up above in Applications->Extensions.
In Settings->Fax Configuration, set Maximum Transfer Rate to 14400 and Minimum Transfer Rate to 4800, Error Correction Mode to Yes (but also tried No).
In the setup for the Grandstream GXW4104 FXO gateway, in FXO Lines, tried most available combinations of T.38 Setting including Relay (default) or Pass Through, all baud rates from 4800-14400, and ECM to match what I had set in FreePBX Settings->Fax Configuration above (tried both options).
Tried sending the PBX a fax from a known-good and fully functional fax machine that works everywhere else, and the PBX would not pick up on it.
I asked Grandstream and they could not help. I’ve spent most of today searching everywhere I can find for help and nothing is available that’s on-point.
Certainly someone else must be doing this?
Appreciate any help… thanks…