US Patent 9312652 Switchable modular jack assembly for telecommunications systems

A switchable modular jack assembly includes a housing which defines a receptacle for receiving an RJ14 modular plug, and a socket for receiving a pre-wired adapter plug. Each of the RJ14 modular plug and the adapter plug has electrical contacts on an exposed surface thereof. The jack assembly also includes leaf spring electrical contacts which extend into the receptacle and socket. When no RJ14 modular plug is received by the receptacle, the leaf spring electrical contacts contact the electrical contacts of the adapter plug. When an RJ14 modular plug is received by the receptacle, the leaf spring electrical contacts contact the electrical contacts of the RJ14 modular plug, but not the electrical contacts of the adapter plug.