Optical Line Protect Switch,Capable of Automatic switching, manual switching and remote switching,Latched when power off...... Fiber Optical Line Protect Switch IntroductionSPC-OPS-1 Optical Line Protect Switch is an auto-switch equipment (for 1+1 protection) used in optical network to back-up optical links and equipments, such as EDFAs, transmitters, etc. It can automatically switch to backup ...