Managed by the FaxBack Support Team
Notes on configuration for AudioCodes M800 and M3000 for V.34 support (using PortaFax driver).

AudioCodes Settings

ISFAXUSED = 1
T38MAXDATAGRAMSIZE = 560
V21MODEMTRANSPORTTYPE = 0
V22MODEMTRANSPORTTYPE = 0
V23MODEMTRANSPORTTYPE = 0
V32MODEMTRANSPORTTYPE = 0
V34MODEMTRANSPORTTYPE = 0
CEDTRANSFERMODE = 0
ENABLEEARLYMEDIA = 1
DSPVERSIONTEMPLATENUMBER = 10 ; Mediant 3000 only
V34FAXTRANSPORTTYPE = 1
FAXRELAYMAXRATE = 13
CNGDETECTORMODE = 1
 
In addition, add T.38 to the existing coders list.
[ CodersGroup0 ]
FORMAT CodersGroup0_Index = CodersGroup0_Name, CodersGroup0_pTime, CodersGroup0_rate, CodersGroup0_PayloadType, CodersGroup0_Sce;
CodersGroup0 0 = g711Ulaw64k, 20, 0, -1, 0;
CodersGroup0 1 = t38fax, 255, 255, -1, 255;
[ \CodersGroup0 ]

PortaFax Settings

Mode = T38_INVITE_SIP, PLAY_CED_AUDIO, RECEIVE_EOM_HOLDUP, RECEIVE_ECM_EOP_HOLDUP
Allowed Transfer Types = FAX, FAX_ECM, V34
Allowed Image Types = All
Allowed Modulation/Rates = All
FaxTransportMode

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