System for interfacing a standard telephone set with a radio transceiver
September 18, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3711647 3912875 Telephone patch Telephone subscriber distribution system Remote telephone system Self-clocking data transmission system Wireless hands-free conference telephone system Transmitter-receiver station having low power consumption for a two-way communication link Multi-channel access (MCA) radio telephone system Ringing signal transmission system for radiotelephone system Patent #: 4574164 InventorsAssigneeApplicationNo. 06/651817 filed on 09/18/1984US Classes:455/74.1, Cordless/corded conversion455/554.1Remote private branch exchange (PBX) with wireless link to landlineExaminersPrimary: Lev, RobertAttorney, Agent or FirmInternational ClassesH04Q 7/32 (20060101)H04Q 7/20 (20060101) AbstractAn interface system for interfacing a standard telephone set with a radio transceiver as part of a telephone network is provided. The radio transceiver may be a conventional cellular-type transceiver or other transceiver having typical control inputs and outputs similar to that provided by cellular transceivers. The interface system converts tone-dial or pulse-dial inputs from the telephone into a serial data stream for storage in the transceiver. The interface system automatically determines when the last numeral or digit is dialed and provides a send signal to the transceiver when such determination is made. The system responds to incoming call signals, such as alert signals, from the transceiver and rings the telephone accordingly. The system simulates ring and dial-tone type signals under conditions typical of standard telephone set usage.Other References
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