| 摘要 |
The invention relates to an interface unit intended to be connected to a parallel connection of a data communication equipment (DCE) or a terminal equipment (DTE). The interface unit comprises multiplexers means (52, 54) for multiplexing connection signals to serial form and vice versa. In the invention, the multiplexers means (52, 54) are connected to parallel connection signals through I/O device (51) comprising an I/O line (L1 . . . L16) for each connection signal. At least some of the I/O lines are automatically selectable as an input or an output and/or connectable to at least two alternative inputs or outputs in the multiplexer (52, 54) for achieving cross-connections, depending on whether the interface is connected to the terminal equipment (DTE) or to the data communication equipment (DCE). |
