Digicom 3910, 3911 operation manual V27bis Train Short Nxt Short Long

DCP Configuration

Table 5-5

(5 of 6)

Leased Line Configuration Options

V27bis Train: Short

Nxt Short Long

This configuration option is only available if Leased-Line Rate is configured for V27bis.

V.27bis Train. Controls the train time for V.27bis operation.

The AT command is S-Register S70=n, where n is 0 for Short and 1 for Long.

V29 TrainOnData: Disable

Nxt Disable Enable

This configuration option is only available if Leased-Line Rate is configured for V29.

V.29 Train On Data. When enabled, the modem receiver can train based upon the incoming data or a training sequence from the distant modem. This function is necessary for a remote (tributary) modem in a V.29 multipoint network and is recommended for a control modem as well.

The AT command is S-Register S92=n, where n is 0 for Disable and 1 for Enable.

V29 Retrain: Enable

Nxt Disable Enable

This configuration option is only available if Leased-Line Rate is configured for V29.

V.29 Retrain. When enabled, the modem transmits a training sequence whenever it receives one. This configuration option should normally be disabled for control modems.

The AT command is S-Register S93=n, where n is 0 for Enable and 1 for Disable.

V29 Link Config: PointToPoint

Nxt PointToPoint Multipoint

This configuration option is only available if Leased-Line Rate is configured for V29.

V.29 Link Configuration. Selects point-to-point or multipoint operation.

NOTE: Remote mode and the Cloning function are not available when configured for V.29 Multipoint. The AT command is S-Register S94=n, where n is 0 for PointToPoint and 1 for Multipoint.

TMp Train Time: 50

Nxt 50 10 20 100 200 300

This configuration option is only available if Leased-Line Rate is configured for TMp.

Trellis Multipoint (TMp) Train Time. Defines the length of time energy is sent from the tributary modem to the control modem. More severe line conditions require longer time selections.

The AT command is S-Register S95=n, where n is 0 for 10 milliseconds, 1 for 20 milliseconds, 2 for 50 milliseconds, 3 for 100 milliseconds, 4 for 200 milliseconds, and 5 for 300 milliseconds.

TMp TxPreemphasis: Disable

Nxt Disable Enable

This configuration option is only available if Leased-Line Rate is configured for TMp.

Trellis Multipoint (TMp) Transmit Preemphasis. Provides amplification for frequencies above the carrier frequency to compensate for high frequency line attenuation.

The AT command is S-Register S96=n, where n is 0 for Disable and 1 for Enable.

3910-A2-GN32-40 September 1998 5-37