All IAS versions.
Enable G.729A codec capability for Digital Fax.
In order to enable G.729A signaling for Digital Fax please proceed as follow:
1) Open the file <StonevoiceAS>\Apps\StoneFax\Server\System\StoneFax.ini
2) Add one of the following parameters to the section [Impostazioni]:
a) To enable only G.729A as audio codec:
T38_LOG_OPTIONS= --sip-audio G.729
b) To enable both G.711 and G.729A as audio codecs:
T38_LOG_OPTIONS= --sip-audio G.711-Alaw-64k --sip-audio G.711-ulaw-64k --sip-audio G.729
The row should appear similar to the following:
[Impostazioni]
T38_LOG_OPTIONS= --sip-audio G.711-Alaw-64k --sip-audio G.711-ulaw-64k --sip-audio G.729
3) Save and close the StoneFax.ini file
4) Stop and Start the Digital Fax service in the page Fax Server | Manage Service [Stop/Start]
5) Make a test
IMPORTANT NOTE: G.729 cannot be used to send/receive faxes in voice passthrough mode. It can be enabled in certain scenarios only to permit the initial call hadshake with PBX or voice gateways. In facts, a voice call established in G.729 codec should immediately switch to a T.38 session to permit the proper fax transmission/reception.