Alarm control system and method

Apparatus and method for visualizing an automatic laser...

Apparatus for optical path monitoring and an optical shutter...

Arrangement and method for testing fiber optic...

Arrangement and method for testing fiber optic...

Automatic power restoring method and optical communication...

Channel mask definition for monitoring wavelength division...

Fault detection and isolation in an optical network

Fault forwarding in an optical network

Fault isolation technique for optical networks

Fault localization apparatus for optical line in wavelength...

Fault localization apparatus for optical line using...

Hybrid optical ring-mesh protection in a communication system

Laser safety method for DC coupled parallel optical link

Light emitter controlling

Method and an apparatus to provide optical equipment protection

Method and apparatus for obtaining status information...

Method and apparatus for switching automatically and...

Method and system for determining origin of optical signal...

Method and system for maintenance of a passive optical network