Nortel Networks TP-1610 SIP user manual Channel Parameters

Mediant 2000 SIP

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		Valid Range and Description
Web Parameter Name*
DJBufMinDelay	0 to 150 msec (default = 70)
[Dynamic Jitter Buffer Minimum	Dynamic Jitter Buffer Minimum Delay.
Delay]	Note: For more information on the Jitter Buffer, refer to Section 6.12.1 on page
	132.
DJBufOptFactor	Dynamic Jitter Buffer frame error / delay optimization factor.
[Dynamic Jitter Buffer Optimization	You can enter a value from 0 to 13.
Factor]	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 that the gateway uses.
[Fax Transport Mode]	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	0 to 4 (default = 0)
pth
[Fax Relay Enhanced Redundancy	Number of repetitions applied to control packets when using T.38 standard.
Depth]
FaxRelayRedundancyDepth	Number of times that each fax relay payload is retransmitted to the network.
[Fax Relay Redundancy Depth]	You can enter a value from 0 to 2.
	The default value is 0.
FaxRelayMaxRate	Limits the maximum rate at which fax messages are transmitted.
[Fax Relay Max Rate (bps)]	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	0	= Disable using ECM (Error Correction Mode) mode during fax relay.
[Fax Relay ECM Enable]	1	= Enable using ECM mode during fax relay (default).
FaxModemBypassCoderType	Coder the gateway uses when performing fax/modem bypass. Usually, high-bit-
[Fax/Modem Bypass Coder Type]	rate coders such as G.711 should be used.
	You can select:
	0	= G711 A-law 64 (default).
	1	= G711 ∝-law.
	4	= G726 32.
	11 = G726_40.

Mediant 2000 SIP User’s Manual 128 Document #: LTRT-72504