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Cellular telephone and associated method for opening a voice channel with a source telephone without establishing voice communications therewith

  • US 5,570,413 A
  • Filed: 07/18/1994
  • Issued: 10/29/1996
  • Est. Priority Date: 07/18/1994
  • Status: Expired due to Term
First Claim
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1. A cellular telephone comprising:

  • a speaker;

    a microphone;

    voice channel establishing means for opening a voice channel between the cellular telephone and a source telephone requesting communications with the cellular telephone without opening said speaker and said microphone of the cellular telephone such that voice communications are prevented between the source telephone and the cellular telephone;

    data receiving means, responsive to said voice channel establishing means, for receiving modulated data via the open voice channel from the source telephone without opening said speaker and said microphone of the cellular telephone;

    demodulating means, responsive to said data receiving means, for processing the received data without opening said speaker and said microphone of the cellular telephone;

    user input means for accepting user input of an alternative terminal identifier after receipt of the identity of the source telephone, wherein said alternative terminal identifier identifies an alternative terminal other than the cellular telephone;

    voice communications routing means, responsive to said demodulating means and said user input means, for transmitting signals via the open voice channel indicative of the alternative terminal other than the cellular telephone and for transferring the communications request to the alternative terminal other than the cellular telephone such that the user of the cellular telephone is permitted to select the alternative terminal other than the cellular telephone based upon the identity of the source telephone without opening said speaker and said microphone and without establishing voice communications with the source telephone;

    data processing means, responsive to said demodulating means, for determining if the source telephone has requested voice communications with the cellular telephone;

    alerting means, responsive to said data processing means, for notifying the user of the cellular telephone, without establishing voice communications with the source telephone, that the source telephone has requested voice communications with the cellular telephone; and

    timer means, associated with said demodulating means, for determining if the cellular telephone has received data from the source telephone within a predetermined time period after opening of the voice channel and, if no data is received within the predetermined time period, for prompting said altering means such that the user of the cellular telephone is notified that the source telephone has requested voice communications therewith.

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