Emergency DAS—often called ERRCS/ERCES—is an in-building radio system that boosts public-safety radio signals so firefighters, police, and EMS can talk to each other inside your building during an emergency. Modern construction blocks radio—these systems restore it with a code-compliant design. 

Emergency Services attend a patient in an office building.Who needs it (and why)
Most jurisdictions require reliable in-building radio coverage for new—and many existing—large/commercial buildings. Requirements are typically enforced by your Authority Having Jurisdiction (AHJ) using IFC Section 510 and NFPA 1225. In many places, systems must be installed, tested, and operational before occupancy. We coordinate everything with your AHJ so you pass the first time. 

How it works (the short version)
Donor antenna (e.g., Yagi) on the roof captures approved public-safety frequencies from the nearest site.

  • A UL 2524–listed bi-directional amplifier (BDA) and head-end safely boost and control the signal.
  • Indoor antennas (low-profile domes for open areas; flat panels for corridors/garages) distribute coverage across floors.
  • The system ties into monitoring and backup power per code and AHJ requirements. 

Our role
Lumina Group, Inc. is a certified installer for SureCall public-safety systems. We handle the grid testing, RF design, permitting, installation, acceptance testing, and annual re-testing—end to end. 

What you get (process)

  • Site survey & RF grid test – Document baseline signal and coverage gaps for AH
  • Code-compliant design – Engineered to IFC 510/NFPA 1225 with UL 2524–listed gear.
  • Permitting & AHJ coordination – Submittals, shop drawings, and scheduling.
  • Installation & commissioning – Donor antenna, BDA, cabling, splitters, indoor antennas, monitoring interface.
  • Acceptance testing & documentation – Coverage verification for final sign-off (often required before occupancy).
  • Annual inspections & maintenance – Keep the sticker on the door and the radios working.
  • UL 2524 is the safety/performance standard for ERCES equipment.
  • NFPA 1225 (2024) consolidates prior radio/DAS requirements and defines design, testing, and maintenance.
  • Public Safety bands (not cellular) with controlled amplification and shutdown per code.
  • Low-profile domes for 360° rooms; panel antennas for long corridors/garages.
  • AHJ-driven features: monitoring, survivability, battery backup, and acceptance testing. 

 

Emergency DAS FAQ

It’s an in-building radio system that boosts approved public-safety frequencies so firefighters, police, and EMS can communicate reliably inside your building during an emergency.

Many jurisdictions require reliable indoor radio coverage for new—and some existing—commercial or large buildings. We perform a grid test, review local code with your AHJ, and confirm whether a system is required.

Emergency DAS carries public-safety radio traffic only. It’s code-driven, uses listed equipment, includes monitoring and backup power, and is separate from any cellular booster you may have.

Site survey and grid testing → engineered design → permitting/AHJ coordination → installation (donor antenna, BDA, cabling, indoor antennas) → acceptance testing and documentation.

Periodic inspections and annual re-testing (timing set by your AHJ), plus monitoring of alarms and backup power to ensure the system is ready when it’s needed.
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