Multiplex communications – Wide area network – Packet switching
Patent
1994-04-28
1994-11-15
Wieder, Kenneth A.
Multiplex communications
Wide area network
Packet switching
370 13, 370 851, 34082506, 34082516, 375 10, H04B 1700
Patent
active
053655150
ABSTRACT:
An apparatus for monitoring and testing a twisted pair, particularly useful for an Ethernet network. First and second DC currents alternated with one another are applied to both ends of the line, asynchronously. By monitoring the potential on the line, a determination is made as to the condition of the line. For example, shorted, crossed, improperly terminated or open conditions can be detected. A visual indication of the condition of the line is provided and additionally, the visual indication provides an indication of the traffic level in the network.
REFERENCES:
patent: 3179882 (1965-04-01), Clear
patent: 3390329 (1968-06-01), Gewirtz
patent: 4679187 (1987-07-01), Irvin
patent: 4799211 (1989-01-01), Felker
patent: 4916694 (1990-04-01), Roth
patent: 5103461 (1992-04-01), Tymes
patent: 5164960 (1992-11-01), Wincn
patent: 5315580 (1994-05-01), Phaal
Hewlett-Packard Co., HP Network Advisor for Quick, Intelligent, Problem Isolation (1990).
Solis Jose M.
Tut Systems, Inc.
Wieder Kenneth A.
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