Apparatus and method for monitoring an optical transmission...

DCC loop plug

DCC loop plug

Distributed fiber sensor with detection and signal...

Error detection and recovery of an optical network element

Identifying or locating waveguides

Method and an apparatus for signal transmission

Method and apparatus for self-testing of test equipment

Method for detecting a check-back signal in an optical...

Method for transferring utility optical signals and...

Method for transferring utility optical signals and...

Method for upgrading an optical transmission system and an...

Method of identifying infrared transmission head function

Method of synchronizing parallel optical links between...

Network testing apparatus, network testing method and...

Optical communications processing system, components and...

Optical network system with quality control function

Optical phase modulator with monitoring structure

Remote data network access in a communication network...

System and method for performance monitoring in a passive...