Paradyne COMSPHERE 3920Plus Technical Reference Manual page 105

TMp TxPre-Value: 5
Nxt 0 1 2 3 4 5 6 7 8 9 A B C D E F
This configuration option only appears if Leased-Line Rate is configured for TMp.
Trellis Multipoint (TMp) Transmit Preemphasis Value. When the TMp TxPreemphis configuration option is enabled,
select a value to control the amount of amplification for frequencies above the carrier frequency to compensate for
high-frequency line attenuation. The higher the value, the greater the amplification.
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 configuration
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
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
End Disable Enable
This configuration option only appears when Dual Leased Line is enabled.
This configuration option does not appear when V.34 is enabled.
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.
3920-A2-GH30-40
Leased Line Configuration Options — Multiport Mode l
Table 5-4
(5 of 5)
October 1998
Configure Branch
Figure 2-1 in Chapter 2).
5-29