Black Box V.35 manual Key Features, Can be managed remotely via modem, Alarm-activated switching

©2003. All rights reserved. Black Box Corporation.

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FALLBACK SWITCH (FBS), INDUSTRIAL

Keep leased-line failures from costing you downtime—and money.

Key Features

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.

Put 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

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”

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