Paradyne COMSPHERE 3920PLUS Technical Reference Manual page 105

COMSPHERE 392xPlus Modems
AutoDialStandby: Disable
Nxt Disable 15min 1hr 4hr Test(2min) Adv 15min Adv 30min Adv 1 hr TestAdv2min
Automatic Dial Standby. Permits a modem operating on dial lines (regardless of the method of dialing origination) to
check the quality of the leased lines periodically and, if they are good, to disconnect from the dial lines and resume
operations on the leased lines. The time interval that the modem uses to check the quality of the leased lines is
determined by the configuration option. These intervals are 15 minutes, 1 hour, and 4 hours. The Test(2min) and
TestAdv2min selections are for testing purposes only. The Adv 15min, Adv 30min, and Adv 1 hr selections cause the
modem to evaluate the leased lines continuously in a manner which is non-disruptive to the dial-line communication.
NOTE: For Automatic Dial Standby to operate properly, it must be enabled prior to a backup occurring.
SpecialStandby: Disable
Nxt Disable Enable
This configuration option only appears when Automatic Dial Standby is configured for 15min, 1hr, 4hr, or
Test(2min) and Leased mode is configured for Originate mode, or if Automatic Dial Standby is configured for
Adv 15min, Adv 30min, Adv 1 hr, or TestAdv2min.
Special Standby. Used to support Automatic Dial Standby configurations when a third modem is used for the dial
backup. When the leased line is restored, the Special Standby configuration allows the leased-line modems to return
service to the original point-to-point modems.
NOTE: When the modems are set for normal dial standby (15min, 1hr, 4hr, or Test(2min)), the Special Standby
configuration option allows the originate modem to test the lease connection in one direction before interrupting
primary data on the dial lines.
NOTE: When the modems are set for advanced dial standby (Adv 15min, Adv 30min, Adv 1 hr, or TestAdv2min), the
Special Standby configuration option allows a non-interruptive algorithm to test the original point-to-point lease
connection in both directions before interrupting primary data on the dial lines.
DialStandbyTime: 10min
Nxt 10min 5min 1min
Dial Standby Time. Selects the amount of time that a dial circuit is held after returning to the leased lines.
CarrierOn Level: – 43dbm
Nxt – 43dbm –26dbm –33dbm
Carrier On Level. Controls the carrier detection threshold for leased lines. When the power level of the receive carrier
signal drops 2 dBm below this level (–26 dBm, –33 dBm, or – 43 dBm), LSD turns OFF. When the carrier signal is
greater than this level, LSD turns ON.
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.
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.
5-28
Leased Line Configuration Options — Multiport Mode l
Table 5-4
(4 of 5)
October 1998 3920-A2-GH30-40