AudioCodes MediaPack 114 Manual de usuario descargar pdf (Pagina 300)

SIP User's Manual 300 Document #: LTRT-65411

MediaPack Series

Parameter Description

FaxModemBypassBasicRT

PPacketInterval

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.

FaxModemBypassDJBufMi

nDelay

Determines the Jitter Buffer delay (in milliseconds) during fax and

modem bypass session.

The range is 0 to 150 msec. The default is 40.

EnableFaxModemInbandNe

tworkDetection

Enables or disables in-band network detection related to fax/modem.

 [0] = Disable (default)

 [1] = Enable

When this parameter is enabled on Bypass mode

(VxxTransportType = 2), 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.

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 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.

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.

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