Code Requirements

Meeting code requirements isn’t optional – it’s essential.

National and regional codes exist to ensure the safety, accessibility, and reliability of critical communication systems during emergencies. Whether it’s enabling life-saving communication in an elevator cab, ensuring public safety in a stairwell, or replacing legacy phone lines with compliant cellular gateways, adherence to code protects both people and property. At AVIRE, we design every solution with code compliance at the forefront. Our products are engineered and tested to meet or exceed applicable regulations. We actively track code updates and make product enhancements to ensure you stay compliant.

See all the codes

Compare codes at a glance

Code Standard	Life Safety	Elevator Safety	Public Safety	Cellular Communications
ADA
ASME A17.1
CSA B44
E911
FCC
IBC/ICC
NFPA 70 (NEC)
NFPA 72
NFPA 101
NFPA 1221/1225
U.S. Pool Phone Laws
UL
UL 2524
UL 2525

ADA

ASME 17.1

CSA B44

E911

FCC

IBC/ICC

NFPA 70 (NEC)

NFPA 72

NFPA 101

NFPA 1221/1225

U.S. Pool Phone Laws

UL

UL 2524

UL 2525

UL 2524

Code Requirements

In-Building Two-Way Emergency Radio Communication Enhancement Systems

UL 2524 is the safety standard for In-Building Emergency Responder Communication Enhancement Systems (ERCES). It ensures that these systems reliably amplify and transmit first responder radio signals throughout a building during emergencies. UL 2524-certified systems must meet strict requirements for signal performance, power reliability, monitoring, and system survivability.

Who It Affects

Manufacturers of Public Safety DAS and signal booster systems
System designers and RF engineers responsible for ERCES layouts
Low-voltage and RF contractors
Fire protection engineers and consultants
Building owners and developers of high-rise, underground, or signal-restricted facilities
AHJs enforcing coverage ordinances
Emergency communication system integrators

Current Code Versions

UL 2524 – First Edition (Published in 2021)

This standard establishes safety and performance requirements for in-building systems that support two-way radio communications for firefighters, police, and EMS personnel. It ensures equipment is reliable, fault-monitored, and capable of continuous operation during emergencies.

Key updates include:

Defined testing requirements for signal boosters, antennas, power supplies, and headend equipment
Required alarm supervision for faults such as power failure, tampering, and signal loss
Mandated battery backup and survivability of cabling to meet NFPA and IFC requirements
Standardized monitoring and system health reporting to building control systems and AHJs
dressed interference prevention to protect public safety radio frequencies

View UL 2524 Standards

Additional Information

UL 2524 is referenced by the International Fire Code (IFC) and NFPA 1225, both of which govern Public Safety DAS/ERRCS systems. These systems are often required in buildings where construction materials block public safety radio signals. AHJs across the U.S. are increasingly requiring UL 2524-certified systems to ensure first responders have uninterrupted radio communication inside buildings during emergencies. AVIRE’s Public Safety DAS offerings are designed to meet UL 2524 requirements and support code-compliant system design, installation, and inspection approvals.