Yasuo Fujii

Centralized supervisory system for supervising network equipments based on data indicating operation states thereof

Centralized supervisory system for transmission network elements and method of supervising transmission network elements

Fault information management system and fault information management method

Tracing system for tracing transmission route in transmission network

Tcp/ip network system

Synchronous digital hierarchy transmission device and method for exchanging synchronous digital hierarchy transmission device units

Fault supervision method for transmission apparatus

Trouble surveillance apparatus for a transmission system

Image editing system for transmission network supervision

Optical communications system