HOME COMMUNICATIONS AND CONTROL SYSTEM

摘要

HOME COMMUNICATIONS AND CONTROL SYSTEM A service circuit for a local telephone line in a building wired with quad telephone conductors, including a tip and ring lead pair continuous with a subscriber's line connected to a remote switching, machine, and a service lead pair within the building. A special service circuit is connected to the tip and ring lead pair and to the service lead pair. A control unit is also connected to the tip and ring lead pair and the service lead pair for receiving signals over either the tip and ring pair or the service lead pair from a telephone connected to the local line, and for generating a predetermined special service circuit enabling signal on the service lead pair, which receives the enabling signal and changes its state in response thereto. The control unit also applies operating power to the service lead pair. The special service circuit provides intercom, paging, tone ringing, etc., and the control unit provides power, control, rapid dialing signals, etc.