Keywords:
Business telecommunications, Circuit networks, Communication, Communication networks, Communications, Computer terminals, Connection engineering, Digital connections, Electrical engineering, ETSI, Interfaces, Interfaces (data processing), Network interconnection, ONP, Open systems, Private networks, Ratings, Specification (approval), Telecommunication, Telecommunication networks, Telecommunication systems, Telecommunications, Telephone equipment, Telephone networks, Telephone technics, Terminal devices, Terminals, Testing