---
id:
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tags:
  - authorship/original
  - destiny/permanent
  - status/incomplete
  - topic/construction/electrical
  - type/encyclopedia
title: Emergency Communications Systems (ECS)
---
# Emergency Communications Systems (ECS)

## Area of Refuge/Rescue (AOR)

Used to provide 2-way communication between the building exterior
and one or more designated areas
offering relative protection from hazards (mainly fire) in an emergency.

An AOR system usually also includes illuminated directional signage.

> [!important]
> Despite their similarities in purpose,
> AOR is not a fire alarm system nor a component of one.
> When requesting low voltage quotes,
> it is necessary to specifically list AOR,
> else contractors may assume it is by others.

Area of Refuge is defined in [[nfpa-101_life-safety-code|NFPA 101: Life Safety Code]].

[[nfpa-72_national-fire-alarm-code#24.10 Area of Refuge (Area of Rescue Assistance) Emergency Communications Systems, Stairway Communications Systems, Elevator Landing Communications Systems, and Occupant Evacuation Elevator Lobby Communications Systems.]]

## Two-Way Communication Systems

In NFPA 101 "two-way communication system" is used as generic term,
to be installed in accordance with the governing code [[nfpa-72_national-fire-alarm-code|NFPA 72: National Fire Alarm and Signaling Code]].

[[nfpa-72_national-fire-alarm-code#Chapter 24 Emergency Communications Systems (ECS)|Chapter 24 Emergency Communications Systems (ECS)]]

[[nfpa-72_national-fire-alarm-code#24.8 Two-Way, In-Building Wired Emergency Services Communications Systems.]]

## Emergency Responder Radio Communication Systems (ERRCS)

> [!info] Also Known As
> * Emergency Responder Radio Coverage (ERRC)

Relevant Standard: NFPA 1225

Where required, compliance is achieved by means of BDA and DAS systems
as required by the AHJ.

> [!quote]
An Emergency Responder Radio Coverage (ERRC) system
is a Public Safety Radio (PSR) DAS system
that enhances the coverage of wireless signals in buildings.
This allows first responders to communicate more effectively during emergencies.

## Voice Evacuation
