AudioCodes Mediant 2000 System

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SIP User's Manual 334 Document #: LTRT-68806

Mediant 2000 & TP-1610 & TP-260/UNI

Table 6-13: Channel Parameters

ini File Field Name

Web Parameter Name

Valid Range and Description

NSEMode

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 gateway 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.

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.

V21ModemTransportType

For a description of this parameter, refer to 'Configuring the Fax /