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Mass Notification

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Send crucial messages to everyone who needs to know

C-DAC coordinates facility-wide, mass notification devices with the ability to simultaneously initiate targeted messages to selected devices in prescribed zones throughout the site. Utilized multiple channels is important because the best way to reach one person may not reach someone else. Options for mass communication include sirens, Advisor Alert Radios, strobes/beacons, message reader boards, visual display monitors, Land Mobile Radio and fire alarm systems.

Emergency Strobe System


ESS is a complete visual alerting device for use in high volume/noise areas, for use in areas that require special alerting, and for use as part of an integrated emergency notification network. ESS supports UHF, VHF, Ethernet, Wi-Fi and other communication pathways. It has AC and solar power options, battery-powered failsafe operation, and two-way alarm reporting and system test features.

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Emergency Radio Alert System


EARS sends targeted messages to any radio received including LMR subscriber units, handheld tactical radios, and Emergency AM broadcast stations. EARS can also be connected to Public Address systems,allowing CentrAlert Operators the ability to broadcast emergency messages over existing infrastructure.

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Message Reader Boards


The MRB sends visual warnings and instructors to affected areas, which is ideal for areas with high noise levels. Different messages can be broadcast to different areas simultaneously, allowing the operator to send the right message to the right people. Messages can be pre-scripted or developed in real time as the situation demands. MRB works with third party reader board signs as well as via direct protocol or when coupled with CentrAlert’s IP2S control box.

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Remote Secure Multi Column


The Multi-Comm software functions with geographically dispersed sirens and other emergency warning devices. It can convert third-party hardware for operations under the CentrAlert C-DAC System protocols. Features include two-way communications with returned diagnostics for system health checks.

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Key Features

Features include two-way communications with returned diagnostics for system health checks.

  • Communication pathways include VHF, UHF, Ethernet, landline and more
  • On board voice message option
  • N+1 amplifier/speaker failover. Detects amplifier failure and automatically brings spare amplifier online to maintain system availability
  • Sound detection for instant feedback on live tests or activation
  • Drop in ready replacement for Whelen sirens
  • Compatible with other third-party siren systems or Public Address systems

SOS Siren

The SOS Siren provides direct two-way controls with native Whelen protocols to any Whelen siren. It can merge other third-party sirens or devices with the SOS module where the third-party protocol is available. It can also be retrofitted with the CentrAlert Remote Secure Multi-Comm and activated with the CentrTalk protocol, allowing a common interface to multiple manufacturers.

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Advisor Alert Radio

  • Multiple input channels: NOAA, VHF, UHF, 800 MHz, Ethernet, input contacts
  • Multiple output types: Tone, Voice, Text, Strobe, Pillow Shakers, output contacts
  • Configurable primary and secondary channels for communications redundancy or override
  • Onboard voice storage capable
  • Single, Group, or Global activation
  • Open API for third party controls
  • Fully compatible with Whelen siren protocols to integrate outdoor and indoor alerting
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