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Bimodal portable telephone

  • US 5,550,895 A
  • Filed: 12/02/1993
  • Issued: 08/27/1996
  • Est. Priority Date: 12/02/1993
  • Status: Expired due to Fees
First Claim
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1. A portable telephone handset comprising:

  • circuit means for communicating with a first base station configured for operation in a frequency hopping system and for communicating with a second base station configured for operation in a cellular radio system, said circuit means including receive signal means for receiving radio-frequency signals from said first base station while configured for operation in said frequency hopping system and from said second base station while configured for operation in said cellular radio system;

    control means for selectably configuring said circuit means for operation of the handset in either of said frequency hopping system or said cellular radio system, and;

    standby circuit means for configuring said handset to a standby state, while in said standby state the receive signal means also being configured by the standby circuit means for monitoring both a selected radio frequency channel in said frequency hopping system for a first time period for detecting an incoming call directed to the handset from the first base station and a selected one from a group of radio frequency channels in said cellular radio system for a second time period for detecting an incoming call directed to the handset from the second base station, while in said standby state the receive signal means cycling between said first and second time period, and wherein said second time period is greater than said first time period.

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