COMMUNICATION SYSTEM AND POWER SUPPLY METHOD FOR COMMUNICATION NETWORK

摘要

PROBLEM TO BE SOLVED: To provide a power supply method and a communication system for a communication network in which interruption of communication is avoided in advance even when a power failure takes place in a commercial power supply line in an installed area of an optical line terminator. SOLUTION: The system is provided with an optical line terminator 10 that has a terminal power supply installation 16 to receive power supply and that is placed on a communication line between a communication control station 2 and a subscriber terminal equipment TE, an optical fiber FBI connecting the communication control station 2 and the optical line terminator 10, and a metallic wire MB that connects the optical line terminator 10 and the subscriber terminal TE to conduct communication between the communication control station 2 and the subscriber terminal TE. In this case, a feeder PB1 is provided, which is installed in parallel with the optical fiber FB1 to supply power from the communication control station 2 to the terminal power supply installation 16, and the subscriber terminal TE receives power supply from the communication control station 2 via the optical line terminator 10 through the feeder PB1 and the metallic wire MB.