Multiplex communications – Diagnostic testing – Path check
Patent
1995-12-13
1998-11-24
Hsu, Alpus H.
Multiplex communications
Diagnostic testing
Path check
370410, 370438, 370522, 34082506, H04J 314
Patent
active
058417613
ABSTRACT:
A system for determining whether or not two of a plurality of nodes (transmission devices) disposed in a complicated communication network, which includes control signal transmission paths and main signal transmission paths in a mixed condition, are physically connected to each other by a main signal transmission path so that setting to be performed by an operator can be performed precisely. In the system a large number of nodes, each having an intrinsic address set thereto and each having one or more ports, are connected to each other by a plurality of transmission paths by which digital signals are transmitted and each of the nodes relays a digital signal which arrives at one of the ports thereof to another one of the ports thereof. A specific bit of the digital signal is allocated as a bit for connection state retrieval.
REFERENCES:
patent: 4756019 (1988-07-01), Szybicki
patent: 4763329 (1988-08-01), Green
patent: 4930119 (1990-05-01), Kobayashi et al.
patent: 4937815 (1990-06-01), Lighthart
patent: 4991204 (1991-02-01), Yamamoto et al.
patent: 5042027 (1991-08-01), Takase et al.
Hsu Alpus H.
NEC Corporation
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