Model Number: BT-XB40A Brand Name: BOOSTEL Key Specifications/Special Features: The fiber optic repeater (FOR) is designed to solve problems of weak mobile signal in the place that is far away from the base transceiver station (BTS) and has fiber optic cable network undergroundThe system consists of two parts: Donor unit and remote unitThe donor unit captures the BTS signal via direct coupler closed to BTS, then converts it into optic signal and transmits the amplified signal to the remote unit via fiber optic cableThe remote unit will reconvert the optic signal into RF signal and provide the signal to the areas where network coverage is inadequateAnd the mobile signal is also amplified and retransmitted to the BTS via the opposite direction