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Remote Alarm Terminal Mode

For

SYSTEM 3505

Overview

The SYSTEM 3505 can support a Remote Alarm Terminal (RAT) mode of operation.

This mode of operation is designed for customers who use the SYSTEM 3505 only

for monitoring Telegraphic alarms. Multiple SYSTEM 3505 units can be configured

in a network environment to be part of the SYSTEM 3505 Remote Alarm Terminal

system.

This mode of operation is designed to replace the original Remote Alarm Terminal units,

sold primarily to large cities, with up to 140 Alarm Box Circuits.

This mode of operation provides features such as placing a circuit in "Test Mode",

bypassing a circuit, rolling the display, etc.

Since the Remote Alarm Terminal mode is an option on the standard SYSTEM 3505,

even communities with as few as one-telegraph circuit can now utilize this mode of

operation.

The Remote Alarm Terminal mode Network presumes that the Master SYSTEM 3505-

RAT is connected to the telegraph loop circuit via the 100MA or 24VDC buss. The

Master unit collects the Make/Break signals from the telegraph circuit loops and converts

them to serial data strings. These data strings are routed to all the SYSTEM 3505-RAT

slaves via a dedicated supervised serial "code" data line. Communication between

Master and Slave units for the purpose of transferring system trouble information, SST

transmission requests is done via the "Network" data line.

Refer to the Digitize SYSTEM 3505 Manual for details on other functions of the

RAT product not covered here.

Digitize can customize the features in your Remote Alarm Terminal to fit your needs.

Features

Items described here are based on having options such a Radio Beep, SST, Remote Alarm

Terminal, Network, dash and All Out options installed in the SYSTEM 3505. The Test Mode,

DIGITIZE, INC. 700251 REV B 04/02

Specifications Subject to Change Without Notice