AudioCodes Mediant 600 User Manual page 431

SIP User's Manual
Parameter
EMS: NSE Mode
[NSEMode]
EMS: NSE Payload Type
[NSEPayloadType]
Web: V.21 Modem Transport Type
EMS: V21 Transport
[V21ModemTransportType]
Web: V.22 Modem Transport Type
EMS: V22 Transport
[V22ModemTransportType]
Web: V.23 Modem Transport Type
EMS: V23 Transport
[V23ModemTransportType]
Version 5.8
Cisco compatible fax and modem bypass mode.
[0] = NSE disabled (default)
[1] = NSE enabled
Notes:
This feature can be used only if VxxModemTransportType
= 2 (Bypass).
If NSE mode is enabled, the SDP contains the following
line:
'a=rtpmap:100 X-NSE/8000'.
To use this feature:
The Cisco gateway must include the following
definition:
'modem passthrough nse payload-type 100 codec
g711alaw'.
Set the Modem transport type to Bypass mode
(VxxModemTransportType = 2) for all modems.
Configure the gateway parameter NSEPayloadType =
100.
In NSE bypass mode, the device starts using G.711 A-Law
(default) or G.711μ-Law according to the parameter
FaxModemBypassCoderType. The payload type used with
these G.711 coders is a standard one (8 for G.711 A-Law and
0 for G.711 μ-Law). The parameters defining payload type for
the 'old' AudioCodes' Bypass mode FaxBypassPayloadType
and ModemBypassPayloadType are not used with NSE
Bypass. The bypass packet interval is selected according to
the parameter FaxModemBypassBasicRtpPacketInterval.
NSE payload type for Cisco Bypass compatible mode.
The valid range is 96-127. The default value is 105.
Note: Cisco gateways usually use NSE payload type of 100.
V.21 Modem Transport Type used by the device.
[0] Disable = Disable (Transparent) -- default
[1] Enable Relay = N/A
[2] Enable Bypass.
[3] Events Only = Transparent with Events.
V.22 Modem Transport Type used by the device.
[0] Disable = Disable (Transparent)
[1] Enable Relay = N/A
[2] Enable Bypass = (default)
[3] Events Only = Transparent with Events
V.23 Modem Transport Type used by the device.
[0] Disable = Disable (Transparent)
[1] Enable Relay = N/A
[2] Enable Bypass = (default)
[3] Events Only = Transparent with Events
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6. Configuration Parameters Reference
Description
September 2009