Use Default Values

Default = On.

If selected, all the fields are set to their default values and greyed out.  

T38 Fax Version

Default = 3.

During fax relay, the two gateways will negotiate to use the highest version which they both support. The options are: 0, 1, 2, 3.

Transport

Default = UDPTL (fixed).

Only UDPTL is supported. TCP and RTP transport are not supported. For UDPTL, redundancy error correction is supported. Forward Error Correction (FEC) is not supported.

Redundancy

Redundancy sends additional fax packets in order to increase the reliability. However increased redundancy increases the bandwidth required for the fax transport.

Low Speed

Default = 0 (No redundancy). Range = 0 to 5.

Sets the number of redundant T38 fax packets that should be sent for low speed V.21 T.30 fax transmissions.

High Speed

Default = 0 (No redundancy). Range = 0 to 5.

Sets the number of redundant T38 fax packets that should be sent for V.17, V.27 and V.28 fax transmissions.

TCF Method

Default = Trans TCF. TCF = Training Check Frame.

Max Bit Rate (bps)

Default = 14400.

Lower rates can be selected if the current rate is not supported by the fax equipment or is found to not be reliable.  

EFlag Start Timer (msecs)

Default = 2600.

EFlag Stop Timer (msecs)

Default = 2300.

Tx Network Timeout (secs)

Default = 150.

Scan Line Fix-up

Default = On.

TFOP Enhancement

Default = On.

Disable T30 ECM

Default = Off.

When selected, disabled the T.30 Error Correction Mode used for fax transmission.

Disable EFlags For First DIS

Default = Off.

Disable T30 MR Compression

Default = Off.

NSF Override

Default = Off.

If selected, the NSF (Non-Standard Facility) information sent by the T38 device can be overridden using the values in the fields below.  

Country Code: Default = 0.

Vendor Code: Default = 0.