Patent ID: 7746993

Claim:
A phone line selector module used in telecommunications related equipment for automatically sensing and switching back and forth between first and second input ports, comprising: a housing formed of a base member and a co-mating cover member, said base member including a bottom wall, opposed side walls, and opposed end walls all formed integrally together; a printed circuit board sub-assembly being disposed within said housing and including a miniature printed circuit board and phone line selector circuitry mounted on said miniature printed circuit board; said phone line selector circuitry including a first ring sensing circuit, a second ring sensing circuit, and latching relay means; said first ring sensing circuit being responsive to a signal received on a first input port to cause said latching relay means to automatically switch from a normally-closed position to a normally-opened position for connecting the first input port to an output port; said second ring sensing circuit being responsive to a signal received on a second input port to cause said latching relay means to automatically switch from the normally-opened position back to the normally-closed position for connecting the second input port to said output port; only said first ring sensing circuit being activated so as to place automatically the first input port in a state awaiting to sense the signal when said second input port is actively connected to said output port; and only said second ring sensing circuit being activated so as to place automatically the second input port in a state awaiting to sense the signal when said first input port is connected to said output port.