System for connecting ISDN tie line via ISDN office line

Details System for connecting ISDN tie line via ISDN office line System for connecting ISDN tie line via ISDN office line

1992-11-25

1994-07-19

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

3701101, H04L 2910

Patent

active

053316290

ABSTRACT:
An ISDN tie line connecting system connects an ISDN tie line between two private branch exchanges via an ISDN office line using an ISDN primary rate interface. The ISDN tie line connecting system includes a tie line interface, a provisional interface for connecting an office line interface, and an interface loop-back part which is coupled to each private branch exchange. The interface loop-back part carries out a conversion between the tie line interface and the provisional interface with respect to the ISDN primary rate interface.

REFERENCES:
patent: 5040170 (1991-08-01), Upp et al.
patent: 5185741 (1993-02-01), Iguchi et al.
patent: 5195087 (1993-03-01), Bennett et al.
patent: 5204860 (1993-04-01), Sparks

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