AudioCodes MP-20x User Manual page 52

Parameter
Image Data
Redundancy Level
T30 Control Data
Redundancy Level
Fax Relay Jitter Buffer
Delay
Error Correction Mode Check to enable fax error correction mode (ECM). Default = Enabled.
Fax Bypass Payload
Type
Modem Transport
Mode
Modem Bypass
Payload Type
Fax/Modem Bypass
Codec
CED Transfer Mode
MP-20x Telephone Adapter
The level for output Image Data (2400...14400 bps).
0 = No redundancy
1 to 3 = Redundancy level
The redundancy level for output T.30 Control Data (300 bps).
0 = No redundancy
1 to 7 = Redundancy level
Configures the Fax Relay Jitter Buffer.
0 = Adaptive Jitter Buffer. The MP-20x DSP device sets the Jitter Buffer
size automatically and then adapts it according to network conditions.
1 to 511 = Fixed Jitter Buffer size (in msec).
Note: This parameter appears only if 'Fax Transport Mode' is "T.38 Relay".
Defines the payload type for fax in Bypass mode.
Note: This parameter appears only if 'Fax Transport Mode' is "Bypass".
Selects the way modem calls are handled:
Transparent = Data is transferred in-band (like a voice call). This can be
used if the codec is G.711.
Voice Band Data = Switch to G.711 via SIP messaging.
Bypass = An automatic switch to AudioCodes' proprietary payload type
(102, 103).
Note: If the Fax transport mode is Bypass or VBD, it must match the
Modem transport mode.
Defines the payload type for modems in Bypass mode.
Note: This parameter appears only if 'Modem Transport Mode' is "Bypass".
Select the codec to be used for the VBD and Bypass modes. PCMA
(default) or PCMU.
G.711 64 kbps A-Law
-OR-
G.711 64 kbps u-Law
By Fax Relay: When the MP-20x is the receiver side, Switch to Fax
relay is enabled upon CED. This allows a high reliable Fax-over-IP call
establishment at the beginning of CED tone.
In Voice Or PCM Bypass: When the MP-20x is the receiver side, to
avoid possible conflicts with low-speed modems, the CED (ANS) relay
by FoIP protocol may be disabled by setting the CED transfer mode to
'In Voice Or PCM Bypass'. In this case, the MP-20x does not initiate the
Fax Relay on detecting CED tone in absence of CNG, but switches to
VBD or remains in voice mode (depends on the Modem Transport
Mode). The MP-20x switches to FoIP later when it defines exactly that a
monitored call is the fax call (CED and CND or V.21 Preamble).
52
Description
Document #: LTRT-50609
User's Manual