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Switches to a backup
line when lapses in
the primary line are
detected.
Available with RS-232,
V.35, and RS-530
interfaces.
Switch using a
console command
or manual pushbutton,
or automatically upon
alarm.
8-position modular
cable included to
connect the switch to
an ASCII terminal.
Can be managed
remotely via modem.
Password-protected
control interface.
P
ut an end to leased line lapses
with the BLACK BOX
®
Fallback
Switch (FBS), Industrial. With this
standalone, remotely controllable
A/B switch, you can establish a
redundant line to carry your data
if your primary line fails. Automatic
switching occurs when the
Fallback Switch detects a lapse
on the primary line.
Available for RS-232/V.24, V.35,
or RS-530 circuits, the Fallback
Switch has three user data
connectors (labeled “common,”
“A,” and “B”) as well as one 8-wire
modular jack that supports 4-wire
cabling for console control.
The type of user connectors
depends on the model you order:
you get DB25 female ports with the
RS-232 and RS-530 versions, and
M/34 female connectors with the
V.35 models.
All offer switching flexibility.
You can switch via console
commands or manually by
pressing a front-panel pushbutton,
or by setting it up so it switches
Keep leased-line failures from
costing you downtime—and money.
Key Features
FALLBACK SWITCH (FBS),INDUSTRIAL
automatically upon an alarm
condition.
An LED on the unit’s front panel
indicates the current Fallback
Switch position, regardless of
whether you switch with the button
or from the console. The switch
also has LEDs that indicate activity
of the interface leads.
Its control interface firmware
functions as the logical bridge
between a management console
(any ASCII terminal) and the
Fallback Switch module, accepting
switching commands from the
console and relaying these
commands to the module.
You can even use a single
management console to control
multiple switches—the Fallback
Switch’s addressing enables
support up to eight units (although,
because of signal loading, the
practical limit may be as few as
three units).
DIP switches on the Fallback
Switch’s main circuit board control
its configuration parameters. With
these, you can assign a unique
address to each unit at a location,
determine if multiple units will be
supported, and determine the
control port command-signaling
rate. Configured as a DTE, the
switch includes control signaling
that may be required by a DCE,
such as a modem.
Alarm-activated switching
Through the management
console, you can program each
data line to alarm on various
interface leads, such as send or
receive data, serial clock transmit
and receive, request to send, and
clear to send.
When you program the
Fallback Switch to switch
automatically upon alarm, the
switch alerts you (or the operator)
when a condition occurs on a
specific interface. Or it can be set
to switch automatically to a backup
link upon alarm. Program it, for
example, so a loss of carrier detect
on the “A” connector triggers
automatic switching to the “B”
Black Box Corporation • 1000 Park Drive • Lawrence, PA 15055-1018 • Tech Support: 724-746-5500 • www.blackbox.com • e-mail: info@blackbox.com
© 2003. All rights reserved.
Black Box Corporation.
10/24/2003 #20273