Keywords:
B-ISDN, Broadband network, Circuit networks, Communication technology, Connection lines, Data transmission control procedures, Digital, Electrical engineering, ETSI, Information processing, Interfaces, Interfaces (data processing), ISDN, Layers, Network interfaces, Physical layers, PIXIT, Protocol Implementation eXtra Information for Testing, Protocol specification, Protocols, Radio systems, Signal transmission, Signalling systems, Subscriber's systems, Telecommunication, Telecommunication networks, Telecommunication systems, Telecommunications, Telephone networks, Testing, UNI, User, Wideband communication