Communications system comprising an ISDN terminal equipment conn

Communications system for an ISDN and a LAN, and an ISDN-LAN con

Communications system for communications between an electronic c

Communications system for data transmission over a time division

Communications system for interconnecting a plurality of asynchr

Communications system for transmitting and receiving data and vo

Communications system having voice and digital data capability a

Communications system with a single protection loop

Communications system with protection switching and channel iden

Communications system with protection switching using individual

Communications system with reliable collision detection method a

Communications systems

Communications systems

Communications technique for transmitting limited size digital d

Communications transmission system

Communications tunneling

Compact AGC circuit with stable characteristics

Compact device for carrying out terminating processing of STS-N

Compact self-contained electrical-to-optical converter/transmitt

Compact wavelength multiplexer-demultiplexer with variable filtr