Bi-Directional Amplifiers (BDA) help to ensure that first responders entering your building can communicate with one another during an emergency. BDA systems are an extension of a public safety radio systems and thus must be carefully designed by an experienced and knowledgeable BDA vendor.
BDA systems ensure reliable two-way communication, receiving and amplifying transmissions from radios inside to the repeater antenna outside. They boost the signal by distributing Radio Frequency (RF) throughout a building. These systems are designed to overcome interference and common impairments to signal strength like concrete, metal, low-E glass windows, underground structures, building materials, etc.
Requirements for BDA systems are enforced by local jurisdictions. It’s important to check with your county Fire Marshal to be sure of requirements per your area. Organizations like the NFPA and IFC set the standards for in-building signal coverage laws. Building owners are responsible for the cost of installing BDA systems, not the local fire department.