AudioCodes Mediant 800B MSBR User Manual page 322

Parameter
Web: Vxx Modem Transport Type
CLI: vxx-transport-type
[IpProfile_VxxTransportType]
Web: NSE Mode
CLI: nse-mode
[IpProfile_NSEMode]
Mediant 800B MSBR
Description
To also send a Re-INVITE message upon detection of
a fax CNG tone in this mode, set the parameter
FaxCNGMode to 1 or 2.

[2] Event Only = The originating fax detects CNG and a
fax session is started by the originating fax, using the
Re-INVITE message. Typically, T.38 fax session starts
when the preamble signal is detected by the answering
fax. Some SIP devices do not support the detection of
this fax signal on the answering fax and thus, in these
cases, it is possible to configure the device to start the
T.38 fax session when the CNG tone is detected by the
originating fax. However, this mode is not
recommended.
Note: The corresponding global parameter is
CNGDetectorMode.
Defines the modem transport type.

[-1] Not Configured = The settings of the global
parameters are used:

V21ModemTransportType

V22ModemTransportType

V23ModemTransportType

V32ModemTransportType

V34ModemTransportType

[0] Disable = Transparent.

[2] Enable Bypass (Default)

[3] Events Only = Transparent with Events.
For a detailed description of this parameter per modem
type, see the relevant global parameter (listed above).
Enables Cisco's compatible fax and modem bypass mode,
Named Signaling Event (NSE) packets.

[0] Disable (Default)

[1] Enable
In NSE bypass mode, the device starts using G.711 A-
Law (default) or G.711 -Law, according to the
FaxModemBypassCoderType parameter. The payload
type for these G.711 coders is a standard one (8 for G.711
A-Law and 0 for G.711 -Law). The parameters defining
payload type for the 'old' Bypass mode
FaxBypassPayloadType and ModemBypassPayloadType
are not used with NSE Bypass. The bypass packet
interval is configured according to the
FaxModemBypassBasicRtpPacketInterval parameter.
The SDP contains the following line:
'a=rtpmap:100 X-NSE/8000'.
Notes:

When enabled, the following conditions must also be
met:

The Cisco gateway must include the following
definition:
'modem passthrough nse payload-type 100 codec
g711alaw'.

Set the Modem transport type to Bypass mode
322
Mediant 800B MSBR
Document #: LTRT-12813