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Mediant 2000 SIP
Mediant 2000 SIP User’s Manual 128 Document #: LTRT-72504
6.12 Channel Parameters
The Channel Parameters define the DTMF, fax and modem transfer modes. Refer to Appendix D
on page 203 for a detailed description of Fax and Modem transfer modes; refer to Section
8.2 on
page 139 for detailed description on DTMF transport modes.
Note that the Default Channel Parameters are applied to all Mediant 2000 channels.
Note: In Table 6-7, parameters in brackets are the format in the Embedded Web
Server
*
.
Table 6-7: Channel Parameters (continues on pages 128 to 131)
ini File Field Name
Web Parameter Name
*
Valid Range and Description
DJBufMinDelay
[Dynamic Jitter Buffer Minimum
Delay]
0 to 150 msec (default = 70)
Dynamic Jitter Buffer Minimum Delay.
Note: For more information on the Jitter Buffer, refer to Section 6.12.1 on page
132.
DJBufOptFactor
[Dynamic Jitter Buffer Optimization
Factor]
Dynamic Jitter Buffer frame error / delay optimization factor.
You can enter a value from 0 to 13.
The default factor is 7.
Note 1: Set to 13 for data (fax & modem) calls.
Note 2: For more information on the Jitter Buffer, refer to Section 6.12.1 on page
132.
FaxTransportMode
[Fax Transport Mode]
Fax transport mode that the gateway uses.
You can select:
0 = Disable.
1 = T.38 Relay (default).
2 = Bypass.
Note: If parameter IsFaxUsed = 1, then FaxTransportMode is always set to 1
(T.38 relay).
FaxRelayEnhancedRedundancyDe
pth
[Fax Relay Enhanced Redundancy
Depth]
0 to 4 (default = 0)
Number of repetitions applied to control packets when using T.38 standard.
FaxRelayRedundancyDepth
[Fax Relay Redundancy Depth]
Number of times that each fax relay payload is retransmitted to the network.
You can enter a value from 0 to 2.
The default value is 0.
FaxRelayMaxRate
[Fax Relay Max Rate (bps)]
Limits the maximum rate at which fax messages are transmitted.
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).
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 = G711 A-law 64 (default).
1 = G711 µ-law.
4 = G726 32.
11 = G726_40.