AddPac VoiceFinder AP2120 User's Guide download pdf (Page 203)

VoiceFinder AP2120 VoIP Gateway User’s Guide Version 1.00

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channel is opened. When the fax transmission is completed, the call reverts to

voice mode.

5.5.2. Configuring T.38 FAX Relay for VoIP H.323

To configure T.38 Fax Relay for VoIP H.323 for all the connections of a gateway,

which is required, use the following commands in the global configuration

mode:

Step Command Description

1 Router(config)#voice service VoIP

Enters voice-service configuration mode.

2 Router(config-vservice-VoIP)#fax

protocol {t38 [redundancy

value

] }

Specifies the global default fax protocol.

. t38 : Enable T.38 Fax relay protocol

. redundancy : (Optional) Configuration

Redundant T.38 Fax packet

value

: Redundancy Value.

Range : 0 ~ 5, Default Value : 0 .

3 Router(config-vservice-VoIP)#fax

rate {2400/ 4800 / 7200 / 9600

/12000 / 14400 / disable }

Selects the maximum fax transmission speed.

4 Router(config-vservice-VoIP)#exit

Exits voice-service configuration mode and

returns to the global configuration mode.

If redundancy is set as 1 or higher, not 0, in the above setting, contents of T.38

packet will be duplicated as many times as the redundancy number and

transmitted.

In this case, higher bandwidth will be required. Therefore, set redundancy as 1

or higher only when there is UDP packet loss in the network. In other cases, set

redundancy as 0.

Set the maximum speed for the fax rate. However, the fax rate is decided by

the transmission cable quality and the transmission speeds of the VoIP gateway

and two fax machines on both sides. If the fax rate is set disabled, T.38 session

will not be opened.

5.5.3. FAX Relay setting by Bypass

To set fax relay with G.711 PCM clean channel in addition of T.38 fax relay, use

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AddPac VoiceFinder AP2120 User's Guide Page 203