DIGITAL PRIVATE BRANCH EXCHANGE, RADIO BASE TRANSCEIVER STATION, AND DIGITAL PRIVATE BRANCH EXCHANGE SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a digital private branch exchange capable of determining a line connection port being used for communication control between a main unit and a radio base transceiver station at high speed.;SOLUTION: Each radio base transceiver station comprises a radio section and a plurality of physical layer communication sections, and a main unit comprises a control data communication means and a physical layer communication section for each line connection port. When communication is started, the main unit transmits Forward Link identification information unique to each line connection port to each radio base transceiver station, the radio base transceiver station passes identification information received by one of a plurality of control data communication means to the other, and each control data communication means sends the same identification information back to the main unit where coincidence of identification information between Forward Link and Reverse Link is checked. The identification information coincides between Forward Link and Reverse Link for only one of two main unit side line connection ports being connected with the same radio base transceiver station and the main unit side control data communication means of that line connection port is determined to be used in communication control.;COPYRIGHT: (C)2004,JPO&NCIPI