Nortel VoIP Gateway, Configuration Manual, Page: 79 / 220

Configuring the Channel Settings 79
Norstar VoIP Gateway Configuration Guide
V21 Modem Transport
Type Select the V.21 Modem Transport Type that the VoIP Gateway uses.
You can select Transparent, Relay or Bypass.
The default value is Transparent.
V22 Modem Transport
Type Select the V.22 Modem Transport Type that the VoIP Gateway uses.
You can select Transparent, Relay or Bypass.
The default value is Bypass.
V23 Modem Transport
Type Select the V.23 Modem Transport Type that the VoIP Gateway uses.
You can select Transparent, Relay or Bypass.
The default value is Bypass.
V32 Modem Transport
Type Select the V.32 Modem Transport Type that the VoIP Gateway uses.
You can select Transparent, Relay or Bypass.
The default value is Bypass.
Note: This option applies to V.32 and V.32bis modems.
V34 Modem Transport
Type Select the V.34 Modem Transport Type that the VoIP Gateway uses.
You can select Transparent, Relay or Bypass.
The default value is Bypass.
Note: This option applies to V.34 and V.90 modems.
Fax Relay Redundancy
Depth Enter the number of times that each fax relay payload is retransmitted to network.
You can enter a value from 0 to 2.
The default value is 0.
Note: This option is applicable only when T. 38 Protection Mode is set to Redundant
Packets.
Fax Relay Enhanced
Redundancy Depth Enter the number of times that control packets are retransmitted when using the T.38
standard.
You can enter a value from 0 to 4.
The default value is 0.
Fax Relay ECM Enable Select Disable if you do not want to use Error Correction Mode (ECM) mode during Fax
relay.
Select Enable if you want to use ECM mode during Fax Relay.
The default value is Enable.
Fax Relay Max Rate Select the maximum rate, in bps, at which fax relay messages are transmitted.
You can select 2400, 4800, 7200, 9600, 12000, or 14400.
The default rate is 14400 bps.
Fax/Modem Bypass
Coder Type Select the Codec you want the VoIP Gateway to use when performing fax/modem bypass.
Usually, high bit rate coders such as G.711 should be used.
The default codec is G.711 ALaw.
Fax/Modem Bypass
Packing Factor Enter the number of codec payloads are used to generate a Fax/Modem Bypass packet.
You can enter a value of 1, 2 or 3 codec payloads.
The default value is 1 codec payload.
CNG Detector Mode Select the Comfort Noise Generation (CNG) Detector Mode you want the VoIP Gateway
to use.
You can select Disable, Relay or Event Only
Table 13 Channel Settings (Continued)
Parameter Description