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In-building radio and cell-phone communications support public safety, improve a building's maintenance and security services, and boost occupant satisfaction. But commercial buildings are poor antennas. The key is to find cost-effective ways to provide adequate coverage.

Bi-Directional Amplifiers (BDAs) provide a means to receive and amplify the signal from a cellular tower for distribution throughout a building or structure allowing users to utilize mobile phones within a facility. Available in a variety of gain and power options, BDAs have been utilized in nearly every application including tunnels, campus environments, high-rise office buildings, warehouses, and residential locations.