Interface unit

Details Interface unit Interface unit

1989-11-21

1992-02-11

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

375121, H04B 300, H04L 2500

Patent

active

050881124

ABSTRACT:
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).

REFERENCES:
patent: 4390967 (1983-06-01), Eglowstein
patent: 4603320 (1986-07-01), Farago
patent: 4607379 (1986-08-01), Marshall et al.
patent: 4734696 (1988-03-01), Rogers
patent: 4751699 (1988-06-01), Tarridec et al.
patent: 4764939 (1988-08-01), Rogers
patent: 4785465 (1988-11-01), Lang et al.
patent: 4852041 (1989-07-01), Nakano

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