Communication system uses diagnostic processors and master proce
Communication system using a bidirectional tree structure networ
Communication system using establishing network route
Communication system using intelligent network processor
Communication system utilizing dynamically slotted information
Communication system which establishes communication sessions ba
Communication system with ISDN as a backup of inter-PBX tie trun
Communication system with redundant links and data bit time mult
Communication system with signal converter between networks
Communication system with slot time error detection
Communication system with subdivided transmission cycles
Communication system, a station to be used in such a system, and
Communication system, network terminal unit to be used in a comm
Communication systems
Communication systems
Communication terminal apparatus
Communication terminal apparatus and communication method for co
Communication terminal apparatus and its control method
Communication terminal connection system
Communication terminal device