Device, system and method for synchronised digital data communication

摘要

The figure shows a secure fax system (200) with a personal computer (100) and a synchronous interface (202) for digital data, connecting the computer to an access medium such as a bus (106). A memory is connected to the interface and the personal computer, so that commands for coding or decoding can be stored, data received from the bus and from the computer. A protocol selecting unit (214) is connected to the interface and the computer to select commands for the mode of transmission and the mode of control and for general communication purposes.