Distributed Antenna Systems and Bi-Directional Amplifiers for reliable in-building cellular coverage and public safety radio compliance — installed by licensed low-voltage contractors across the Southeast US.
Modern commercial buildings — concrete, steel, Low-E glass, and dense construction — are excellent insulators against cellular and radio frequency signals. The result: dropped calls in conference rooms, dead zones in parking structures, and first responders who can't communicate in an emergency.
JB Technologies designs and installs Distributed Antenna Systems (DAS) and Bi-Directional Amplifier (BDA) systems that solve both problems. Whether your priority is improving cellular service for tenants and employees or meeting public safety radio coverage requirements mandated by the IFC and local AHJ, we engineer a solution that works and passes inspection.
Most jurisdictions across the Southeast now require buildings over a certain square footage or height to provide in-building coverage for first responder radio communications. Requirements are enforced at certificate of occupancy. Contact us to determine what your building needs.
Every DAS or BDA project starts with a radio frequency survey that measures signal levels throughout the building, identifies dead zones, and determines the donor antenna location. We design a system that achieves the required signal strength at every point — whether for cellular carriers, public safety bands, or both.
Our team installs the complete DAS or BDA infrastructure: donor antenna, headend amplifier, coax distribution cabling, splitters, combiners, and remote antenna units. We coordinate with building management and the general contractor to minimize disruption to occupied spaces during installation.
Emergency Responder Radio Communication Systems (ERRCS) must meet IFC Section 510 requirements and pass a coverage acceptance test with the local fire marshal. We prepare all required documentation, coordinate with the AHJ, and perform the in-building coverage verification test to ensure your Certificate of Occupancy isn't delayed.
Carrier-neutral DAS solutions that improve cellular coverage for AT&T, Verizon, T-Mobile, and other carriers simultaneously. Ideal for office towers, hotels, stadiums, hospitals, and any facility where reliable cellular service affects tenant satisfaction and productivity.
Public Safety DAS (ERRCS/BDA) is designed specifically to support first responder radio communications on public safety frequency bands. It's a life-safety system governed by the IFC, NFPA 1, and local fire codes. Most jurisdictions require it in buildings over 50,000 sq ft or above a certain number of floors.
Commercial Cellular DAS improves cellular service for everyday users across all commercial frequency bands. It's a tenant amenity system, not a life-safety requirement — but in competitive real estate markets, dead zones cost leases.
Many buildings benefit from a combined system that addresses both requirements on a shared infrastructure — reducing overall cost compared to two separate installations.
Certain building types and construction characteristics consistently create RF coverage problems:
Full public safety BDA design, installation, and acceptance testing to meet IFC requirements and pass AHJ inspection for Certificate of Occupancy.
Passive coax-and-splitter systems for smaller buildings; active fiber-based DAS for large campuses requiring multiple remote units and carrier integration.
Single infrastructure supporting all major cellular carriers simultaneously, eliminating the need for separate carrier-specific installations.
Public safety ERRCS systems include required battery backup to maintain operation during power outages, plus supervisory monitoring connections.
DAS and BDA installation in occupied buildings with minimal disruption using existing pathways, wireless backhaul options, and phased installation schedules.
Coverage verification testing with documentation for AHJ submission, carrier acceptance, and building owner records.
Tell us about your building and we'll assess what type of DAS or BDA system is required.
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