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Hi Everyone, I have a question about setting up a fax machine with an Audiocodes FXS gateway (MP-118).In the past couple of months we have moved from PureConnect to Genesys Cloud. On PureConnect, I had some MP118s set up to handle our stand-alone fax machines (Ricoh MFPs) and it worked fine using T.38 for faxing. According to this article Add an analog fax machine to the Genesys Cloud telephony system - Genesys Cloud Resource Center the BYOC Edge does not support T.38, so I have changed the configuration on the MP118 to use G711 passthrough. For some reason, faxes when going through the FXS gateway are failing. (the call is successful and I am getting two way audio, its just that the devices don't appear to be communicating once they are connected)If I try to send/receive a fax by using the e-fax functionality in the apps.mypurecloud.com interface, the majority of the time the fax is successful, so I'm starting to doubt the configuration of the MP118.Would anyone happen to have any suggestions or possibly a working MP1xx configuration that you might be able to share with me so I can compare and see what setting I'm missing?Thanks,Craig
ON FXS GATEWAY
1.) Open 'SIP General Parameters' (Configuration|Protocol Configuration|Protocol Definition|SIP General Parameters) a. Fax Signaling Method = G.711 Transport
b. Detect Fax on Answer Tone = Initiate T.38 on Preamble
2.) Open 'Fax/Modem/CID Settings' (Configuration|Media Settings|Fax/Modem/CID Settings).
a. Fax Transport Mode = RelayEnable
b. V.21 Modem Transport Type = Disable
c. V.22 Modem Transport Type = Disable
d. V.23 Modem Transport Type = Disable
e. V.32 Modem Transport Type = Disable
f. V.34 Modem Transport Type = Disable
g. Fax Relay Enhanced Redundancy Depth = 2
h. Fax Relay ECM Mode = Disable
i. Fax CNG Mode = Disable
j. CNG Detector Mode = Disable
On the Edge Group in GenesysCloud:Changed the interedge codec to be G.711 instead of the default Opus. This would prevent the fax call from being transcoded and introducing additional loss that could impact the signaling. This can be done by adding this custom parameter
Property Name: trunk_media_codecData Type: ListValue: "audio/pcmu"
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