User`s manual

SIP User's Manual 404 Document #: LTRT-83303
Mediant 1000 & Mediant 600
7.2.2.7 Fax / Modem Transparent with Events Mode
In this mode, fax and modem signals are transferred using the current voice coder with the
following automatic adaptations:
 Echo Canceller = on (or off, for modems)
 Echo Canceller Non-Linear Processor Mode = off
 Jitter buffering optimizations
To configure fax / modem transparent with events mode, perform the following
configurations:
 IsFaxUsed = 0
 FaxTransportMode = 3
 V21ModemTransportType = 3
 V22ModemTransportType = 3
 V23ModemTransportType = 3
 V32ModemTransportType = 3
 V34ModemTransportType = 3
 BellModemTransportType = 3
7.2.3 Supporting V.34 Faxes
Unlike T.30 fax machines, V.34 fax machines have no relay standard to transmit the data
over IP to the remote side. Therefore, the device provides the following operation modes
for transporting V.34 fax data over the IP:
 Using bypass mechanism for V.34 fax transmission (refer to ''Using Bypass
Mechanism for V.34 Fax Transmission'' on page 404)
 Using relay mode, i.e., fallback to T.38 (refer to ''Using Relay mode for both T.30 and
V.34 faxes'' on page 405)
Note: The CNG detector is disabled (CNGDetectorMode = 0) in all the following
examples.
7.2.3.1 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