Signaling frequency detection for a communications network
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United States of America Patent
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Jul 16, 1996
Issued Date -
N/A
app pub date -
Mar 16, 1995
filing date -
Apr 14, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus is provided for detecting the signaling frequency of communications signals transported on the trunk and lobe circuits of a token ring. The communications signals including Differentially Manchester Encoded data signals. The apparatus includes an internal trunk circuit and a plurality of ports including an input port for connecting to an input trunk segment, and an output port for connecting to an output trunk segment, and a plurality of lobe ports for connecting to the lobe circuits. Means are provided for sensing the frequency of the data signals at each of said plurality of ports. The sensing means including means for taking multiple successive timing samples, and grouping the samples into quality groups.
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