Modular PCMCIA modem and pager
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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Abstract
A computer peripheral is provided that combines the functionality of multiple devices, for example, a pager, a facsimile machine, and a data modem. The computer peripheral is designed as one or more separable modules, or functional components, including a module for interfacing the peripheral to a host computer. At least one of the functional components can be operated either as part of the computer peripheral, or may be separated from the remainder of the computer peripheral and used as a self contained functional module.
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Citations
27 Claims
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1. A data communication device comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A pager module adapted to be removably coupled to a modem module coupled to a host computer, the modem module having modem circuitry and switching circuitry including a DATA-- TO-- HOST line, a DATA-- FROM-- HOST line and a CONTROL line, the pager module comprising:
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pager circuitry for receiving wireless communications, the pager circuitry including control circuitry coupled to the DATA-- TO-- HOST, DATA-- FROM-- HOST and CONTROL lines, the control circuitry asserting a first control signal on the CONTROL line responsive to a first predetermined data sequence received on the DATA-- FROM-- HOST line, so that the switching circuitry enters a first operational mode wherein the pager circuitry communicates with the host computer via the DATA-- TO-- HOST line, and asserting a second control signal on the CONTROL line responsive to a second predetermined data sequence received on the DATA-- FROM-- HOST line, so that the switching circuitry enters a second operational mode wherein the modem circuitry is coupled to the host computer and the pager circuitry is disconnected from the host computer. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A modem module comprising:
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interface circuitry for coupling to a host computer; modem circuitry; means for removably coupling a pager module to the modem module; and switching means responsive to a control signal asserted by the pager module responsive to a predetermined data sequence received by the pager module from the host computer, the switching means having a first mode of operation wherein the modem circuitry is coupled to the host computer to communicate via a telephone line, and a second mode of operation wherein the pager module is coupled to the host computer. - View Dependent Claims (19, 20, 21, 22)
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23. A method of enabling a host computer to communicate by a telephone line and wireless messaging using a data communication device comprising a modem module having interface circuitry, modem circuitry and switching circuitry and a pager module for receiving wireless messages, the pager module including pager circuitry and control circuitry, the pager module removably coupled to the modem module, the method comprising steps of:
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coupling the data communication device to the host computer; issuing a first predetermined data sequence by the host computer to the control circuitry of the pager module; providing a first control signal from the control circuitry to the switching circuitry responsive to the first predetermined data sequence; and responsive to the first control signal, setting the switching circuitry to a first state wherein the modem circuitry is coupled to the interface circuitry to enable the host computer to communicate via the telephone line. - View Dependent Claims (24, 25, 26, 27)
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Specification