Survivable ring transmission system with multiple protection...

Switching algorithm for optical fiber networks

Switching arrangement for fault recovery in optical WDM ring...

System and method for bypassing a faulty node in an optical...

System and method for fully utilizing available optical...

System and method for preventing signal loss in an optical...

System and method for providing destination-to-source...

System and method for transmitting and restoring an optical...

Temperature compensation for transmission between nodes...

Terminals having sub-band substitute signal control in...

Through channel loss prevention at a WDM node

Time-division and wave-division multiplexed link for use in...

Transmission apparatus and path selection method of a...

Transmission apparatus and path selection method of a...

Transmitting broadcast signals in a communication network

Two-fiber interconnected ring architecture

Two-fiber optical ring network

Use of variable ratio couplers for network protection and...

Video transmission system of a ring network

Virtual protection channel for fiber optic ring network