Distributed digital subscriber line access multiplexer
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United States of America Patent
Stats
-
May 3, 2011
Grant Date -
Feb 15, 2007
app pub date -
May 26, 2006
filing date -
Aug 11, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A distributed DSLAM, which comprises a head end subsystem located within a switching facility and a remote subsystem located outside of the switching facility. The head end subsystem is operative for routing streams of data from a data network to the remote subsystem over a communication link, while the remote subsystem is operative for transmitting over a set of local loops analog signals comprising digitally modulated versions of the data. Separating the routing and modem functionality between inside and outside plant facilities reduces heat dissipation in the outside plant, leading to increased reliability. Flow control can be performed in the upstream and downstream directions by transmitting portions of individual packets and withholding other portions of individual packets. This is done instead of withholding the transmission of entire packets. As a result, the perceived impact on video quality, for example, is lessened.
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