Synchronization in digital communications networks
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United States of America Patent
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Jul 17, 2001
Grant Date -
N/A
app pub date -
Dec 29, 1997
filing date -
Jun 27, 1995
priority date (Note) -
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Abstract
Disclosed is a digital communications network comprising a branched passive optical network connecting a head-end with a plurality of optical network units. The time taken to synchronize by ranging, all optical network units and the head-end, when the network needs to be initialized from scratch, has been minimized using the disclosed method. The synchronization time has been minimized by making all bandwidth in the upstream direction of the network available for the purpose of course ranging. Once the whole network is ranged, the bandwidth is made available, in a normal way, to combined data communications and operations and management functions.
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