SPA 3102: Troubles with fax machine connected to SPA and dialing by IP PBX

Afternoon!
I have a fax machine connected to the SPA3102 and i have configured an extension from the IP PBX, that it's working as a fax, so the problem here is that sometimes when i'm sending a fax, this one fail, it shows an error, the other problem is that i'm not receiving any fax at all, the people get the tone, and actually send the fax, and here it shows "receiving" (it's the weird part) but after 40-50 seconds everything fail, it shows "error communication"
Hoping for help
Victor

Hello,
as far as I know, FAX and VoIP aren't the best friends - those technologies are not designed to work together smoothly ...
You may try following tuning :
Set your fax machine to 9600 (not 14400),
Make sure you only use G711a (Europe) or G711u (US) codec (fax will not work with others).
Activate  T38 FAX support if your device FW offers such possibility.

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