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Dual mode cellular modem

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H04M-011/00
출원번호 US-0175449 (1993-12-30)
발명자 / 주소
  • Scott Robert E. (Indian Rocks Beach FL)
출원인 / 주소
  • AT&T Corp. (Murry Hill NJ 02)
인용정보 피인용 횟수 : 124  인용 특허 : 0

초록

A mobile phone includes a modem, hereinafter referred to as a cellular radio modem. This cellular radio modem supports two modes of operation-an analog mode, where the cellular radio modem provides an analog signal for transmission; and a digital mode, where the cellular radio modem provides a digit

대표청구항

A method for use in a modem to maintain a data connection between a cellular-side of the data connection and a public-switched telephone side of the data connection, the method comprising the steps of: operating the modem in a current mode of operation, wherein the current mode of operation is eithe

이 특허를 인용한 특허 (124)

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