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System for providing a simultaneous data and voice channel within a single channel of a portable cellular telephone to provide position-enhanced cellular services (PECS)

  • US 6,226,529 B1
  • Filed: 12/08/1994
  • Issued: 05/01/2001
  • Est. Priority Date: 12/08/1994
  • Status: Expired due to Fees
First Claim
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1. A cellular telephone accessory system for simultaneously incorporating data and voice within a single voice channel of a portable cellular telephone having an accessible phone bus, comprising:

  • 1) cradle means for receiving said portable cellular telephone and having a microphone interface and speaker interfaces, 2) a core unit having a data-in-voice modem for receiving and transmitting voice and data signals simultaneously in said single voice channel when said cellular telephone is in said cradle, a micro controller, switch means controlled by said micro controller for controlling data and voice signals to and from said modem on said single voice channel, and a hands-free controller circuit for sensing presence of said portable cellular telephone in said cradle, 3) connector means for;

    1) a supplemental antenna and means of coupling RF signals from said portable cellular telephone to said supplemental antenna, 2) coupling audio lines of said telephone bus to said data-in-voice modem in said core unit, and 4) a voice line controlled by said hands-free circuit for connecting said microphone and speaker to said core unit.

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