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Emergency Responders lose communications when in-building radio signals are weakened by structures such as concrete, windows and metal. The Bi-Directional Amplifier (BDA) System, also known in some markets as DAS-Distributed Antenna System, is a signal-boosting solution designed to enhance in-building radio frequency (RF) signal coverage for public safety radios. These two-way radio signal boosters are used to bring facilities into compliance with both local code and Emergency Responder Radio Coverage (ERRC) code. 


  • Any building that is identified and inspected under local ordinances and/or is requiring public safety permits.
  • Many facilities now require BDA installation with new or building renovation permits and certifications.
  • Any building where first responders, maintenance, and security personnel need to maintain constant two-way communications.
  • Airport Terminals
  • Apartment Buildings
  • Assisted Living Facilities
  • Commercial Buildings
  • Convention Centers
  • Governmental Buildings
  • Hospitals
  • Hotels
  • Manufacturing Plants
  • Parking Garages
  • Retail Shopping Malls
  • Schools and Campuses
  • Shipping Ports
  • Stadiums and Arenas


  • New Construction: By December 31, 2019, new construction buildings must meet the requirements for the fire department for radio communications.
  • Existing Commercial buildings: By December 31, 2019, buildings that are not in compliance with the requirements for minimum radio strength for fire department communications must apply for an appropriate permit for the required installation with the local government agency having jurisdiction and must demonstrate that the building will become compliant by January 1, 2022.
  • Existing Apartment buildings: By December 31, 2022, existing apartment buildings are required to apply for the appropriate permit for the required communications installation. Existing apartment buildings must be in compliance with radio strength by January 1, 2025.

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