The base transceiver station has interfaces for either a digital telephone network over cable, usually fiber, or a microwave antenna feed. units on towers, buildings, or light posts. All devices need to be connected to a fiber network that provides the data nits, the RRU, and Baseband Units, the BBU. Via optical fiber The RRU connects to the BBU, forming a new “distributed At the base of the tower locates BBU while the RRU is at the top of the tower. The RRU is further connected to the antennas via coaxial cables and power dividers (couplers), with the main trunk using optical fiber and the. The installation of an OSP fiber optic cable is conventional, underground, direct buried or aerial to the tower and terminated at the base using the hardware for the BBU. While the legacy network architecture uses coax cables to transmit high-frequency signals from the base. FTTA, also known as fiber to the antenna, is a wireless network architecture that replaces bulky coax cables with fiber optic cables running up the tower.
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