System for interfacing a standard telephone set with a radio transceiver
Patent 4775997 Issued on October 4, 1988. Estimated Expiration Date: 
April 8, 2007. 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.
April 8, 2007. 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 3856982 Control circuitry for a radio telephone Long distance telephone call security system Telephone station apparatus with selective restricting of local calls System for interfacing a standard telephone set with a radio transceiver Patent #: 4658096 InventorsAssigneeApplicationNo. 07/035898 filed on 04/08/1987US Classes:455/557, Interface attached device (e.g., interface with modem, facsimile, computer, etc.)455/554.1, Remote private branch exchange (PBX) with wireless link to landline455/564Auto-dialing or repertory dialing (e.g., using bar code, etc.)ExaminersPrimary: 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 similates ring and dial-tone type signals under conditions typical of standard telephone set usage.Other References
Field of SearchRestrictive dialing circuit | |
