5G (3.5 G) TDD Fiber Link 104

光纖直放站（FOR）旨在解決遠離基站收發器（BTS）且地下具有光纜網絡的地方移動信號弱的問題。 

該系統由兩部分組成：主單元和遠程單元。主單元通過與BTS閉合的直接耦合器捕獲BTS信號，然後將其轉換為光信號，並通過光纜將放大的信號傳輸到遠程單元。遠程單元會將光信號轉換為RF信號，並將該信號提供給網絡覆蓋範圍不足的區域。並且移動信號也被放大並經由相反的方向重發到BTS。

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 underground.

The system consists of two parts: Master Unit and Remote Unit. The Master 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 cable. The Remote unit will reconvert the optic signal into RF signal and provide the signal to the areas where network coverage is inadequate. And the mobile signal is also amplified and retransmitted to the BTS via the opposite direction.