A telephone jack and a telephone plug are electrical connectors for connecting a telephone set or other telecommunications apparatus to the telephone wiring inside a building, establishing a connectio
Modular connector 6P6C plug (left) and 6P4C jack (right)
Bell System Type 404A jack and type 283B plug (c. 1960)
Trimline telephone line cord with a Type 505A wall plug and modular set plug (mid-1960s)