I try to setup an ATA to use my analog FAX machine over VoIP.
Situation: Brother 7225N FAX machine, PAP2T oder SPA 2101, Ethernet, 3CX PBX - software, Patton 4552 Gateway to ISDN public network.
Result: Phone works, FAX receiving works with SPA 2101, but not with PAP2T, sending a FAX fails. The both FAX machines sending the common piep tones against each other, but no communication is establishes.
I try out several settings, I found along the documentation and some other forums, nothing helps.
Is there any body outside, who has setup a similar system which works? And if so, whats the key settings?
THANKS for helping.
With best regards