3Com VCX V7122 User Manual page 133

Table 30 Channel Parameters
ini File Field Name
*
Web Parameter Name
DJBufMinDelay
[Dynamic Jitter Buffer
Minimum Delay]
DJBufOptFactor
[Dynamic Jitter Buffer
Optimization Factor]
FaxTransportMode
[Fax Transport Mode]
FaxRelayEnhancedRedundancy
Depth
[Fax Relay Enhanced
Redundancy Depth]
FaxRelayRedundancyDepth
[Fax Relay Redundancy Depth]
FaxRelayMaxRate
[Fax Relay Max Rate (bps)]
FaxRelayECMEnable
[Fax Relay ECM Enable]
FaxModemBypassCoderType
[Fax/Modem Bypass Coder
Type]
CNGDetectorMode
[CNG Detector Mode]
3Com VCX V7122 SIP VoIP Gateway User Manual
Valid Range and Description
0 to 150 msec (default = 70).
Dynamic Jitter Buffer Minimum Delay.
Note: For more information on the Jitter Buffer, see
on page 136.
Dynamic Jitter Buffer frame error / delay optimization factor.
You can enter a value from 0–13.
The default factor is 7.
Note 1: Set to 13 for data (fax & modem) calls.
Note 2: For more information on the Jitter Buffer, see
Operation on page 136.
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).
0–4 (default = 0).
Number of repetitions applied to control packets when using T.38 standard.
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.
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).
0 = Disable using ECM (Error Correction Mode) mode during Fax Relay.
1 = Enable using ECM mode during Fax Relay (default).
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.
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.
Dynamic Jitter Buffer Operation
Dynamic Jitter Buffer
133