Circuit to provide backup telephone service for a multiple...

Circuit, architecture and method for redundant data communicatio

Cluster system, cluster member, and failure recovery method...

Combined electro-mechanical and solid state switching fabric

Combining routers to increase concurrency and redundancy in...

Common protection architecture for optical network

Common protection architecture for optical network

Communication apparatus and abnormality restoration method

Communication apparatus, control method, and computer...

Communication device and logical link abnormality detection...

Communication management system, communication management...

Communication method and apparatus for a radio local area...

Communication monitoring method, communication monitoring...

Communication network system

Communication network system including ring network that...

Communication node, restoration method and communication...

Communication path quality monitoring method and quality...

Communication system architecture and operating methodology...

Communication system, relay apparatus, end system, and...

Communication system, switch