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Cordless telephone

  • US 5,915,227 A
  • Filed: 07/21/1998
  • Issued: 06/22/1999
  • Est. Priority Date: 08/04/1995
  • Status: Expired due to Term
First Claim
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1. A cordless telephone consisting of a base unit connected to a PBX and a handset unit which wirelessly transmits or receives signals to or from said base unit, comprising:

  • a buffer memory incorporated in said handset unit, for storing a key code which is correspondingly generated when a dial key is depressed;

    key code transmission control means incorporated in said handset unit, for transmitting the generated key code to said base unit via a transmitter of said handset unit;

    acknowledge transmission means incorporated in said base unit, for generating and transmitting an acknowledge signal to said handset unit when the key code transmitted from said handset unit is received at said base unit;

    display means incorporated in said handset unit; and

    display control means incorporated in said handset unit, for controlling to display the number of the dial key on said display means by reading out the key code from said buffer memory when said handset unit receives the acknowledge signal from said acknowledge transmission means, thereby a dial-key-echo-back signal from said PBX being not required to be transmitted to said handset unit.

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