Emergency local switching

Details Emergency local switching Emergency local switching

1993-02-26

1995-05-23

Hsu, Alpus

Multiplex communications

Wide area network

Packet switching

370 681, 3701101, 371 91, 371 113, 379284, H04J 312, H04M 324

Patent

active

054187761

ABSTRACT:
Disclosed is an apparatus and method for providing transmission between end users coupled to a digital loop carder access system. During normal operation, the access system functions to transmit data and supervisory signals between each end user and a local digital switch. In the event of a failure in the coupling between the access system and switch, the access system provides transmission paths between each end user and designated users such as emergency services which am coupled to the same access system.

REFERENCES:
patent: 4394756 (1983-07-01), Canniff
patent: 4558444 (1985-12-01), Kennedy et al.
patent: 4566094 (1986-01-01), Ardon et al.
patent: 4583218 (1986-04-01), Ardon et al.
patent: 4943999 (1990-07-01), Ardon
patent: 4979164 (1990-12-01), Ardon
patent: 5046067 (1991-09-01), Kimbrough
patent: 5115425 (1992-05-01), Ardon

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