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Extension phone type cordless telephone set

  • US 5,533,101 A
  • Filed: 07/28/1994
  • Issued: 07/02/1996
  • Est. Priority Date: 07/28/1993
  • Status: Expired due to Term
First Claim
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1. An extension phone cordless telephone comprising:

  • a terminating set operative from power supplied from a commercial power line;

    a plurality of branch sets, each branch set including an associated stand, said stand operating using power from said commercial power line;

    said terminating set including;

    a terminating set radio communication circuit including a radio transceiver operating to effect radio communication with one of said branch sets; and

    a terminating set wire communication circuit including a wire line communication transceiver operating to effect wire communication with one of said branch sets using a signal superimposed on said commercial power line;

    each stand including;

    a branch set connecting portion for transmitting and receiving at least a transmission/reception signal and a control signal to and from said branch sets; and

    a stand wire communication circuit including a wire line communication transceiver operating to effect communication using a signal superimposed on said commercial power line with said terminating set wire communication circuit;

    each of said plurality of branch sets including;

    a branch set communication circuit, including a radio communication circuit operating to communicate with said radio transceiver in said terminating set via wireless communications;

    a stand connecting portion for connecting with said stand; and

    a communication controller, controlling said stand wire communication circuit and said branch set communication circuit, such that only one branch set can communicate via wireless communications with said terminating set, and another branch set can communicate via said wire communications with said terminating set while said one branch set is communicating via wireless communications.

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