AudioCodes Mediant 2000 User Manual page 375

SIP User's Manual
Parameter
EMS: NTE Max Duration
[NTEMaxDuration]
EMS: Basic Packet Interval
[FaxModemBypassBasicRTPPack
etInterval]
EMS: Dynamic Jitter Buffer Minimal
Delay (dB)
[FaxModemBypassDJBufMinDela
y]
EMS: Enable Inband Network
Detection
[EnableFaxModemInbandNetwork
Detection]
EMS: NSE Mode
[NSEMode]
Version 5.8
Maximum time for sending Named Telephony Events (NTEs)
to the IP side, regardless of the time range when the TDM
signal is detected.
The range is -1 to 200,000,000 msec (i.e., 55 hours). The
default is -1 (i.e., NTE stops only upon detection of an End
event).
Determines the basic frame size that is used during fax /
modem bypass sessions.

[0] = Determined internally (default)

[1] = 5 msec (not recommended)

[2] = 10 msec

[3] = 20 msec
Note: When set for 5 msec (1), the maximum number of
simultaneous channels supported is 120.
Determines the Jitter Buffer delay (in milliseconds) during fax
and modem bypass session.
The range is 0 to 150 msec. The default is 40.
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 = 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.
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 =
375
6. Configuration Parameters Reference
Description
October 2009