Using Bypass Mechanism For V.34 Fax Transmission; Using Relay Mode For Both T.30 And V.34 Faxes - AudioCodes Mediant 600 User Manual

Using the ini file parameter V34FaxTransportType, you can determine whether to pass V.34
Fax-over-T.38 fallback to T.30, or use Bypass over the High Bit Rate coder (e.g. PCM A-
Law).
Note:
9.7.3.1

Using Bypass Mechanism for V.34 Fax Transmission

In this proprietary scenario, the device uses bypass (or NSE) mode to transmit V.34 faxes,
enabling the full utilization of its speed.
Configure the following parameters to use bypass mode for both T.30 and V.34 faxes:
FaxTransportMode = 2 (Bypass)
V34ModemTransportType = 2 (Modem bypass)
V32ModemTransportType = 2
V23ModemTransportType = 2
V22ModemTransportType = 2
Configure the following parameters to use bypass mode for V.34 faxes and T.38 for T.30
faxes:
FaxTransportMode = 1 (Relay)
V34ModemTransportType = 2 (Modem bypass)
V32ModemTransportType = 2
V23ModemTransportType = 2
V22ModemTransportType = 2
9.7.3.2

Using Relay mode for both T.30 and V.34 faxes

In this scenario, V.34 fax machines are forced to use their backward compatibility with T.30
faxes and operate in the slower T.30 mode.
Use the following parameters to use T.38 mode for both V.34 faxes and T.30 faxes:
FaxTransportMode = 1 (Relay)
V34ModemTransportType = 0 (Transparent)
V32ModemTransportType = 0
V23ModemTransportType = 0
V22ModemTransportType = 0
SIP User's Manual
The CNG detector is disabled (CNGDetectorMode = 0) in all the subsequent
examples.
486
Mediant 600 & Mediant 1000
Document #: LTRT-83305