DCP Configuration
4-57
3920-A2-GN31-30
November 1996
Table 4-11
(5 of 5)
Leased Line Configuration Options— Singleport Mode
A
V29 Link Config: PointToPoint
Nxt PointToPoint Multipoint
This configuration option only appears when 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 only appears when 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: Enable
Nxt Enable Disable
This configuration option only appears 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 Enable and 1 for Disable.
Lease Lookback: Disable
Nxt Disable Enable
Lease Lookback. While operating on backup lines, this configuration option allows the modem to test the primary 4-wire
leased lines for connectivity by detecting line energy across the normal line bandwidth. This test of the primary lines will
not interrupt the data flow on the backup lines. The configuration option settings must be the same at both ends.
Dual_Leased_Ln: Disable
End Disable Enable
Dual Leased Line. Allows the 2-wire backup facility to function as a 2-wire leased line facility. When this option is
disabled, the backup facility is a 2-wire dial line.
NOTE: Plug the leased line into the jack labeled DIAL on the rear panel of the modem (see Figure 2-1 in Chapter 2).
Except for dialing, ring indication, and call progression functions, you control the backup function as if it were a
normal dial backup.
NOTE: When the Dual Leased Line configuration option is changed, the modem will reset.
BackupLine Check: Disable
Nxt Disable Enable
This configuration option is only available when the Dual Leased Line device option is enabled and the V.34 is
disabled in the LeaseLine Rate configuration option.
Backup Line Check. Tests the backup circuit for availability while the modem is operating on the primary 4-wire leased
lines. The test involves detecting line energy across the normal bandwidth. This test of the backup lines will not interrupt
the data flow on the primary lines. The configuration option settings must be the same at both ends.
NOTE: In network applications where the modem is in backup mode and is connected to a modem other than the
modem connected to the primary leased-line, enabling this configuration can cause problems.
