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Cellular cordless telephone

  • US 5,367,558 A
  • Filed: 02/28/1994
  • Issued: 11/22/1994
  • Est. Priority Date: 09/23/1988
  • Status: Expired due to Term
First Claim
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1. A method of re-establishing telephone communications between a called telephone number and a cellular cordless telephone on one of a cellular telephone system and a cordless telephone system when call transfer has been selected by the user thereof during a telephone call, said cellular cordless telephone having a cellular transceiver and a cordless transceiver and originating and receiving cellular telephone calls on cellular radio channels of a cellular telephone system and cordless telephone calls on at least one cordless radio channel of a cordless base station coupled to a telephone landline having a landline telephone number, said method comprising the steps of:

  • monitoring the signal quality of said telephone call on said one of said cellular telephone system and said cordless telephone system;

    determining if at least one radio channel is available for a call on the other one of said cellular telephone system and said cordless telephone system;

    determining if call transfer has been selected; and

    automatically originating another telephone call to said called telephone number on said other one of said cellular telephone system and said cordless telephone system determined to have at least one available radio channel, in response to a predetermined change in the signal quality of said telephone call and a determination that call transfer has been selected.

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