AudioCodes MediaPack MP-201B, User Manual, Page: 52 / 270

MP-20x Telephone Adapter 52 Document #: LTRT-50609
User's Manual
Parameter Description
Image Data
Redundancy Level The level for output Image Data (2400…14400 bps).
ƒ
0 = No redundancy
ƒ
1 to 3 = Redundancy level
T30 Control Data
Redundancy Level The redundancy level for output T.30 Control Data (300 bps).
ƒ
0 = No redundancy
ƒ
1 to 7 = Redundancy level
Fax Relay Jitter Buffer
Delay Configures the Fax Relay Jitter Buffer.
ƒ
0 = Adaptive Jitter Buffer. The MP-20x DSP device sets the Jitter Buffer
size automatically and then adapts it according to network conditions.
ƒ
1 to 511 = Fixed Jitter Buffer size (in msec).
Error Correction Mode Check to enable fax error correction mode (ECM). Default = Enabled.
Note: This parameter appears only if 'Fax Transport Mode' is “T.38 Relay”.
Fax Bypass Payload
Type Defines the payload type for fax in Bypass mode.
Note: This parameter appears only if 'Fax Transport Mode' is “Bypass”.
Modem Transport
Mode 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.
Modem Bypass
Payload Type Defines the payload type for modems in Bypass mode.
Note: This parameter appears only if 'Modem Transport Mode' is “Bypass”.
Fax/Modem Bypass
Codec 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
CED Transfer Mode ƒ
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.
ƒ
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).