Wireless data communication system using a microphone/headphone jack of a portable phone
May 7, 2017. 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 ReferencesMulti frequency eddy current test apparatus with intermediate frequency processing Microprocessor controlled interface for cellular system Voice circuit of telephone Cordless phone data logger Amplifier having digital bias control apparatus Portable hybrid communication system and methods Telephone apparatus providing for automatic transfer of stored data between handsets Programmable universal modem system and method for using the same Personal communications service using wireline/wireless integration Selective reconfiguration method and apparatus in a multiple application personal communications device InventorAssigneeApplicationNo. 852493 filed on 05/07/1997US Classes:455/557, Interface attached device (e.g., interface with modem, facsimile, computer, etc.)455/556.1Integrated with other deviceExaminersPrimary: Eisenzopf, Reinhard J.Assistant: Nguyen, Duc Attorney, Agent or FirmInternational ClassH04B 001/38Foreign Application Priority Data1996-05-07 KRAbstractA wireless data communication system using a microphone/headphone jack of a portable phone. The system may be constructed with a computer modem; a microphone jack and a headphone jack of a portable computer; a portable phone having said microphone/headphone jack; and an interface module which transmits signals by electrically connecting said computer modem and said microphone/headphone jack of said portable phone. A dedicated cable for interfacing the modem and the portable phone is unnecessary, a private protocol for wireless communication is unnecessary, and the private protocol does not need to be previously written into a random access memory when the data of the portable computer is transmitted/received by wireless using the portable phone. The interface module circuit between the computer modem and the portable phone is simplified, by using less cables, and an existing jack may be used for coupling the modem and the portable telephone.Field of SearchInterface attached device (e.g., interface with modem, facsimile, computer, etc.)Card control element Central office responsive to emergency call or alarm (e.g., "911", operator position display) Having gain control means With control of input electrode or gain control electrode bias Including plural amplifier channels | |
