Great Lakes Fire Protection offers all the components required for design and installation of the Emergency Radio Communication Enhancement Systems (ERCES): signal boosters/ Bi-Directional Amplifiers (BDA), batteries and battery enclosures, donor antennas, Distributed Antenna Systems (DAS), coaxial cables, connectors and lightning arrestors, power dividers and hybrid couplers, design services and training.Signal Boosters/Bi-Directional Amplifiers (BDA) Gamewell-FCI Class B BDAs are high gain, high power band-selective signal boosters/bi-directional amplifiers that can be designed and customized to meet all public safety frequency band ranges. It is intended to provide reliable two-way radio signal coverage inside buildings, tunnels and other structures. The band selective design delivers a reliable performance in even the most challenging RF environments. State of the art design delivers high reliability and excellent performance in a small, lightweight, and economical package. Gamewell-FCI Class B BDAs have been tested and evaluated in accordance with UL2524 requirements for In-building 2-Way Emergency Radio Communication Enhancement Systems, NFPA and IBC/IFC standards compliance—making it the best choice for public safety and other mission critical applications.