OPTICAL SIGNAL CHANGEOVER DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an optical signal changeover device that keeps an optical switch in prescribed state, even on the occurrence of noise or the like caused by power on/off or the like in an optical switch control circuit. SOLUTION: An optical switch control circuit 1-1 is provided with an optical switch drive means 2-1, a power supply section 3-1, and a power supply monitor means 4-1. The monitor means 4-1 controls stopping of the optical switch drive means 2-1 by allowing the switch drive means 2-1 to detect a control signal 6-1 generated at the time, when the power supply section 3-1 does not satisfy contain specified conditions.