Version 6.2 737 February 2011
SIP User's Manual 12. Configuration Parameters Reference
Parameter Description
EMS: Enable Inband Network
Detection
[EnableFaxModemInbandNetw
orkDetection]
Enables or disables in-band network detection related to
fax/modem.
[0] = Disable (default)
[1] = Enable
When this parameter is enabled on Bypass and transparent with
events mode (VxxTransportType is set to 2 or 3), a detection of
an Answer Tone from the network triggers a switch to bypass
mode in addition to the local Fax/Modem tone detections.
However, only a high bit-rate coder voice session effectively
detects the Answer Tone sent by a remote endpoint. This can be
useful when, for example, the payload of voice and bypass is the
same, allowing the originator to switch to bypass mode as well.
EMS: NSE Mode
[NSEMode]
Cisco compatible fax and modem bypass mode.
[0] = NSE disabled (default)
[1] = NSE enabled
In NSE bypass mode, the device starts using G.711 A-Law
(default) or G.711μ-Law according to the
FaxModemBypassCoderType parameter. 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' Bypass mode FaxBypassPayloadType and
ModemBypassPayloadType are not used with NSE Bypass. The
bypass packet interval is selected according to the
FaxModemBypassBasicRtpPacketInterval parameter.
Notes:
This feature can be used only if the VxxModemTransportType
parameter is set to 2 (Bypass).
If NSE mode is enabled, the SDP contains the following line:
'a=rtpmap:100 X-NSE/8000'.
To use this feature:
9 The Cisco gateway must include the following definition:
'modem passthrough nse payload-type 100 codec
g711alaw'.
9 Set the Modem transport type to Bypass mode
(VxxModemTransportType is set to 2) for all modems.
9 Configure the gateway parameter NSEPayloadType =
100.
This parameter can also be configured per IP Profile, using the
IPProfile parameter (see ''Configuring IP Profiles'' on page
143).
EMS: NSE Payload Type
[NSEPayloadType]
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.
Web: V.21 Modem Transport
Type
EMS: V21 Transport
[V21ModemTransportType]
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
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