User`s manual

Mediant 2000 & TP-1610 & TP-260
SIP User's Manual 196 Document #: LTRT-68805
6.17 Channel Parameters
The Channel Parameters define the DTMF, fax and modem transfer modes. Refer to
Section
8.3 on page 210 for a detailed description of Fax and Modem transfer modes; refer
to Section
8.2 on page 208 for detailed description on DTMF transport modes.
Note that the Default Channel Parameters are applied to all the gateway's channels.
Table 6-12: Channel Parameters (continues on pages 196 to 200)
ini File Field Name
Web Parameter Name
Valid Range and Description
DJBufMinDelay
[Dynamic Jitter Buffer Minimum
Delay]
0 to 150 msec (default = 10)
Dynamic Jitter Buffer Minimum Delay.
Note: For more information on the Jitter Buffer, refer to Section 8.6 on page
215.
DJBufOptFactor
[Dynamic Jitter Buffer Optimization
Factor]
Dynamic Jitter Buffer frame error / delay optimization factor.
The valid range is 0 to 13.
The default factor is 10.
Note 1: Set to 13 for data (fax and modem) calls.
Note 2: For more information on the Jitter Buffer, refer to Section
8.6 on
page 215.
FaxTransportMode
[Fax Transport Mode]
Fax transport mode that the gateway uses.
You can select:
0 = Disable (transparent mode).
1 = T.38 Relay (default).
2 = Bypass.
3 = Events only.
Note: If parameter IsFaxUsed = 1, then FaxTransportMode is always set to
1 (T.38 relay).
FaxRelayEnhancedRedundancy
Depth
[Fax Relay Enhanced Redundancy
Depth]
Determines the number of repetitions applied to control packets when using
T.38 standard.
The valid range is 0 to 4. The default value is 0.
FaxRelayRedundancyDepth
[Fax Relay Redundancy Depth]
Number of times that each fax relay payload is retransmitted to the network.
The valid range is 0 to 2.
The default value is 0.
FaxRelayMaxRate
[Fax Relay Max Rate (bps)]
Limits the maximum rate at which fax messages are transmitted (outgoing
calls).
0 = 2.4 kbps
1 = 4.8 kbps
2 = 7.2 kbps
3 = 9.6 kbps
4 = 12.0 kbps
5 = 14.4 kbps (default).
Note: The rate is negotiated between the sides, i.e., the gateway adapts to
the capabilities of the remote side.
FaxRelayECMEnable
[Fax Relay ECM Enable]
0 = Disable using ECM (Error Correction Mode) mode during fax relay.
1 = Enable using ECM mode during fax relay (default).
FaxModemBypassCoderType
[Fax/Modem Bypass Coder Type]
Coder the gateway uses when performing fax/modem bypass. Usually,
high-bit-rate coders such as G.711 should be used.
You can select:
0 = G.711 A-law 64 (default).
1 = G.711 µ-law.
CNGDetectorMode
[CNG Detector Mode]
0 = Disable (default).
1 = Event Only (N/A).
2 = Relay. T.38 fax relay session is initiated by the originating fax if
‘IsFaxUsed = 1’. Note that using this mode isn’t recommended.