Passive optical communication network with broadband upgrade
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United States of America Patent
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Jun 14, 1994
Issued Date -
N/A
app pub date -
Mar 25, 1992
filing date -
Dec 12, 1991
priority date (Note) -
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status (Latency Note)
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Abstract
An optical communication network includes at least one single-mode fiber, referred to as a 'primary fiber,' for transmission between a central office and a distribution node, and at least one multiplicity of single-mode fibers, referred to as 'distribution fibers,' for transmission between the distribution node and a multiplicity of optical network units (ONUs). Transmissions are exchanged between the primary and distribution fibers via at least one optical coupler located at the distribution node. The network is passive in the sense that all monitoring of the transmission media and the ONUs can be performed at the central office, without active intervention at remote locations. The network includes a monitor and a multiplicity of bypass lines by means of which at least a portion of inbound signals from the distribution fibers are transmitted to the monitor without passing through the optical coupler at the distribution node.
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