| 摘要 |
A method and apparatus for transmitting data over a wireless communication system of either the packet data type or the circuit switched type is provided. A data source (10), such as a personal computer, is connected to a specially adapted modem (12) that is capable of formatting data for transmission over either a packet switched system, such as the CDPD system, or a circuit switched system, such as a conventional cellular telephone system. A control device (11) controls the modem (12) and a transceiver (13), and it determines which communication system is the most desirable. The desirability of the communication system may be based upon cost or quality of the connection which can be established on that particular system.
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