Digital interface between at least two subscriber line interface

Details Digital interface between at least two subscriber line interface Digital interface between at least two subscriber line interface

1988-01-25

1990-01-09

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

370 581, 370 681, H04J 312

Patent

active

048933090

ABSTRACT:
A digital interface between at least two subscriber line interface circuits and a processing unit is described. The interface is configured in the form of a parallel interface. The level of an input/output register and of a control register is allocated, as needed, to the connections of the processing unit. These connections can be operated selectively as inputs or outputs. They can also be operated in two modes, depending upon which type of subscriber line interface circuit (SLIC) is connected. The connections of the last-mentioned units are partially operable as inputs or outputs and partially operable only as inputs but in the input case, selectively for various types of input signals.

REFERENCES:
patent: 4430733 (1984-02-01), Hardy et al.
patent: 4730308 (1988-03-01), Friedman et al.

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