"A modular jack assembly for connecting and switching computer network cables. The jack assembly includes at least one jack module with two sets of connectors for linking wires from cables to the module and at least one jack. The modules within jack assembly slide between a first position and a second position. In the first position, the two sets of connectors linked to cables are electrically connected to each other, allowing normal through signals transmission. In the second position, the electrical connection between the connector sets is broken and the plug contacts within each jack are linked to one of the sets of connectors, allowing pass-through connections, such as a cross-connection, to be made." from http://www.freepatentsonline.com/6482039.html