OPTICAL LINE CHANGEOVER CONNECTION DEVICE

摘要

PURPOSE:To quicken the changeover connection and to save the man-hour and to automate the opening of a subscriber connected to a station and a retrieval setting of a bypass route under various states. CONSTITUTION:A standby transmission line and active transmission line independently of each other in the unit of one core are provided respectively among a station 3 in optical cable loops 1A, 1B, a feeding point 7 and a subscriber side transmitter 10 and between a cable drawing point of a large user buildings 5A, 5B and the subscriber side transmitter. A 1X2 optical switch 12 coupling or switchingly connecting the active and the standby transmission lines in the unit of one core is provided just before the subscriber side transmitter and a 2X2 optical switch 16 switchingly connecting the active and the standby transmission lines in the unit of one core is provided in the station and a NXM optical switch 15 switchingly connecting the active and the standby transmission lines in the unit of one core is provided in the station. The detection of a fault location of the optical core wire is detected, a transmitter alarm is monitored, the core wire connection state and a changeover component connection state are managed and a changeover bypass route is retrieved and selected.