Optical communications – Diagnostic testing – Determination of communication parameter
Reexamination Certificate
2006-09-05
2010-06-22
Sedighian, M. R. (Department: 2613)
Optical communications
Diagnostic testing
Determination of communication parameter
C398S033000, C398S038000
Reexamination Certificate
active
07742697
ABSTRACT:
Network elements are identified as being connected to optical nodes by instructing two network elements in a spectrum group of the CMTS to transmit at frequencies f1and f2, respectively. Frequencies f1and f2are selected such that they produce intermodulation distortions (intermods) in the laser transmitter at f3when combined. If intermods are produced which exceed a predetermined threshold, then the two network elements are determined to be on the same node. If the total power of the signal by the laser transmitter exceeds an impact threshold, then the test is stopped and new network elements are selected for testing.
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PCT International Search Report and Written Opinion for PCT/US07/71755, Issued on Feb. 29, 2008.
Cooper Michael J.
Moore Charles S.
Moran John L.
Thompson Robert J.
Cullen Larry T.
General Instrument Corporation
Sedighian M. R.
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