The 4200 Series is an audio-visual type (with voice communications) system. It is designed to provide an emergency signal between 1 to 44 (or more) area of refuge (area of rescue assistance) remote call-in stations and the master station.

The 4200 Series answers with an 'acknowledge' LED, and the ability to speak with the calling remote(s) using the built-in intercom feature.

Calls are indicated at the master by visual and audible signals. Remote call-in stations have call-placed and call-answered LED Indicators. A maximum of 20 remote call-in stations may be connected to any of the master stations. Larger capacity masters are available on a special-order basis.

The 4200 series systems has 'supervised' circuitry to indicate when a wiring fault has occurred. Both systems are available with standard and/or vandal-resistant remote call-in stations, and with standard power supply or battery back-up.

A full line of ada signage is also available for this system.

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