Method and apparatus for transmission of analog and digital
a technology of analog and digital transmission, applied in the direction of digital transmission, wireless communication, wireless communication, etc., can solve the problems of no capacity to work with all four, and no bridge throughput of 80%
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[0035]Referring to the drawing and to FIG. 1 in particular, shown therein and generally designated by the reference character 120, is a preferred embodiment of a modem-controller according to the present invention. Microcontroller 10 is a microprocessor which is employed as the controller for modem-controller 120. One static read-only memory (RAM) 14 is added to the system to provide adequate working space for programming. An erasable programmable read only memory (EPROM) 16 is added to the system to provide enough ROM space for the firmware. RAM 14 and EPROM 16 are operatively connected to microcontroller 10 by data and address bus 12. Microcontroller 10 executes the firmware or modem BIOS stored in EPROM 16 and manipulates the data in RAM 14 through the data and address bus 12. A decoder in microcontroller 10 is used to decode the address bus to select RAM 14, EPROM 16 or data pump 18. Modem-controller 120 communicates with the DTE 2 through the RS232C interface 6 operatively conn...
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