Paradyne COMSPHERE 3920PLUS Technical Reference Manual page 103

COMSPHERE 392xPlus Modems
Autorate: Enable
Nxt Enable Disable Fast GainHit
Autorate. Once connected, the modem automatically lowers the line rate if line conditions become impaired. When line
conditions improve, the modem automatically shifts up to the highest data rate the line can support. Autorate only
occurs between 19,200 bps and 4800 bps during V.32, V.32bis, and V.32terbo connections and 33.6 and 2400 bps for
the V.34 family.
Fast – Autorate is enabled and tuned to minimize bit errors.
GainHit – Autorate is enabled and tuned to switch to the next lower rate if gain hits exceed the rate specified using the
Gain Hit Threshold configuration option.
Gain Hit Thresh: 010 ASCI
Nxt " 010 ASCI
This configuration option only appears when Autorate is set to GainHit.
Gain Hit Threshold. Determines the rate of gain hits required to force the modem to shift to the next lowest line rate. The
threshold is specified as a decimal number 0 through 127 inclusive, representing the maximum number of gain hits that
will be tolerated in a 15-minute interval. The default is 010 ASCII, which has the effect that the eleventh gain hit in a
15-minute interval forces a downshift.
V32bis Override: Disable
Nxt Disable 2400
This configuration option only appears when Leased-Line Rate is 4800(V32b).
V.32bis Override. Activates the Paradyne Point-to-Point Diagnostic 2400 bps modulation. Allows the modem to use a
non-standard, point-to-point modulation capable of secondary channel diagnostics while running at 2400 bps.
NOTE: This configuration option must be the same in both the local and remote modems.
Leased Tx Level: 0
Nxt 0 –1 –2 –3 – 4 – 5 – 6 –7 – 8 –9 –10 –11 –12 –13 –14 –15
Leased Transmit Level. Selects the modem's transmit power level over leased-lines. The transmit output level can be
selected in 1 dBm decrements from 0 dBm to –15 dBm.
NOTE: The leased TX level is limited to –1 dBm in all countries except North America.
NOTE: The factory default setting is country dependent. Default is 0 in North America.
Asymmetric Rate: Disabled
Nxt Enable Disable
This configuration option only appears when V.34 is enabled.
Asymmetric Rate. Controls rate symmetry when running V.34 modulation by enabling or disabling the V.34 modulation
from using equal transmit and receive rates.
Enable – The modem operates in asymmetric rate mode (the transmit and receive rates can be different) when running
V.34 modulation. The Asymmetric Rate configuration option must be enabled in both modems.
Disable – The modem operates in symmetric rate mode (the transmit and receive rates are identical) when running
V.34 modulation. Either modem can force symmetric mode by disabling the Asymmetric Rate configuration option.
NOTE: This configuration option is typically disabled when the MUX is in use, and it is enabled when the MUX is disabled.
If you are using a factory template that has the MUX enabled, and then you manually disable the MUX, you must
verify that this configuration option is set to the correct value.
5-26
Leased Line Configuration Options — Multiport Mode l
Table 5-4
(2 of 5)
October 1998 3920-A2-GH30-40