Emergency Responder Communication Enhancement System (ERCES)

In-building emergency responder radio systems, also known as emergency responder communication enhancement systems (ERCES), are an essential life safety tool that enables communication between responders in and around buildings during an emergency situation. Systems may comprise a combination of the following: repeater, transmitter, receiver, signal booster components, remote annunciators and operational consoles, power supply, and battery charging system components.

When emergency responders enter a building, their ability to maintain interoperable and continuous communications is paramount to the protection of both public safety and the public’s safety. An In-Building ERCES ensures that communication signals can penetrate into all areas of buildings in accordance with model fire codes and standards. This includes areas that are especially difficult for Radio Frequency (RF) to penetrate, such as exit stairwells, occupant use elevators, basements, buildings with Low-E glass, thick-walled or other areas shielded with various types of building materials.

Inspection Cycles:

  • Periodic testing is required at least annually. Annual testing includes at least one quantitative DAQ test per floor, oscillation testing, and confirmation of fire alarm supervision
  • Five-year testing includes quantitative DAQ grid testing of the entire facility to confirm coverage is unchanged from system installation.

Common Deficiencies:

  • Insufficient antenna coverage
  • Insufficient isolation
  • Damaged RF cabling
  • Damaged or missing components
  • Donor antenna no longer pointed to donor site
  • System not providing coverage for required frequencies

Related Service:

  • Annual and 5-year Inspections
  • Radio Coverage Grid Testing
  • 3rd Party Acceptance Testing
  • New System Design and Install
  • System Repair


ERCES Antenna 1