Black Box 32144, Manual

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CHAPTER 4: General Operation and Special Features
4.9.1 A
UTODIAL
B
ACKUP
The modem will automatically dial
the stored number to connect over
the backup line if it detects poor
signal quality (ER) or a loss of
carrier detect (CD) on the leased
line. The criteria used by the
modem in assessing the condition
of the leased line depend upon the
settings of the Signal Quality
option (one error in 10
3 or 10 5 bits)
and the Carrier Detect Level
option (-43, 33, or -26 dBm).
Dial Backup Message
When dial backup occurs (either
automatically or by operator
intervention), the following
message will flash on the front
panel LCD of both modems:
4.9.2 E
XIT FROM
L
EASED
L
INE
A
UTO
-
R
ECOVERY
If the Leased Line Auto-Recovery
Return option is enabled (see
below, the modem will
automatically exit the Auto-
Recovery mode when the leased
line conditions are satisfactory. Any
normal disconnects (such as loss of
carrier or line current) may also
disconnect the dial connections
and return communication to the
leased line.
To ensure the proper disconnect
capabilities for Leased Line Auto
Recovery mode, both of the
following disconnect options must
be enabled on both modems: line
current disconnect (CURRENT
DISC’T screen) and carrier
disconnect (CARRIER DISC’T).
To manually exit the Leased Line
Auto-Recovery mode and return to
leased-line operation, select DIAL
from MAIN MENU screen 1, and
then select HANGUP for the
AUTO-DIAL screen.
ATTENTION:
DIAL BACKUP
This message will clear when the
modem returns to the leased line.
If you want to clear the message
while the modem is still in dial-
backup mode, press the ENT
pushbutton.