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Modular PCMCIA modem and pager

  • US 5,550,861 A
  • Filed: 10/28/1994
  • Issued: 08/27/1996
  • Est. Priority Date: 09/27/1994
  • Status: Expired due to Fees
First Claim
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1. A data communication device comprising:

  • a modem module having modem circuitry, first interface circuitry for selectively coupling the modem circuitry to a host computer and second interface circuitry for coupling the modem circuitry to a telephone line;

    a pager module having pager circuitry, the pager module removably coupled to the modem module, the pager circuitry operating in a first mode to transmit wireless messages to the host computer via the first interface circuitry, and in a second mode, when uncoupled from the modem module and removably coupled to a battery pack, to receive wireless messages; and

    switching circuitry disposed in the modem module and having a first operational state wherein the modem circuitry is coupled to the first interface circuitry to enable the host computer to communicate via the telephone line and a second operational state wherein the pager circuitry is coupled to the first interface circuitry to operate in the first mode, the switching circuitry defaulting to the first operational state when the pager module is uncoupled from the modem module.

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