Modifying FAX Relay Profile Settings

Applies to version v2.7

To configure FAX Relay settings, do the following:

1- Click Fax Relay in the Editing Profile window, to display the customizable options.

2- Modify settings as required.

• Click Save

List of Parameters

Fax/Modem Relay

• Fax Modem Relay:Enable Fax/Modem Relay
• Fax Modem Relay: Detection Mode
• Fax Modem Relay: Relay Mode
• Fax Modem Relay: Modem vs. Fax distinction timeout
• Fax Modem Relay: Fax/Modem tones detection duration
• Fax Modem Relay: Enable early Fax/Modem tone detection
• Fax Modem Relay: Enable switching to FAX relay upon CNG tone

T.38 Parameters

• T.38 Parameters: Use V.34
• T.38 Parameters: Maximum Bit Rate
• T.38 Parameters: Fill Bit Removal
• T.38 Parameters: Redundancy Count
• T.38 Parameters: Transmission level (-1dBm unit)

Fax/Modem Pass-through Parameters

• Fax Modem Pass-Through Parameters: Detection Type
• Fax Modem Pass-Through Parameters: Codec
• Fax Modem Pass-Through Parameters: Jitter Buffer Depth
• Fax Modem Pass-Through Parameters: Use NSE

To configure NSE, you must go in your profile.

You simply have to check "Use NSE", like:

If NSE exchange is possible (negociated in the SDP), the switch to passthrough will happen in the RTP stream, not with a SIP re-INVITE anymore.

Note: Our implementation of NSE currently only support switch to passthrough, which means you can exchange NSE packets to switch to T.38.