Descriptors | Seatings, Design, Classification systems, Electric connectors, Telephony, Earth terminals, Earthing, Thermal resistance, Telecommunication systems, Electrical components, Interfaces, Telephone equipment, Mechanical testing, Test equipment, Marking, Analogue circuits, Impact strength, Test specimens, Electrical testing, Electrical safety, Environment (working), Jacks (sockets), Dimensions, Electric sockets, Electrical insulation |