Paradyne COMSPHERE 3920Plus Technical Reference Manual page 138

COMSPHERE 392xPlus Modems
V29 TrainOnData: Disable
Nxt Disable Enable
This configuration option only appears when 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 only appears when 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 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 TxPreemphis: Disable
Nxt Disable Enable
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 Disable and 1 for Enable.
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.
The AT command is S-Register S38 = n, where is from 0 to F (hex).
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.
5-62
Leased Line Configuration Options — Singleport Mode A
Table 5-11
(6 of 7)
October 1998 3920-A2-GH30-40