Multiport - multipoint digital data service
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United States of America Patent
Stats
-
Jan 5, 1993
Grant Date -
N/A
app pub date -
Apr 20, 1990
filing date -
Apr 20, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a Digital Data System (DDS) a method and apparatus for providing multipoint multiport service. Differences in time delays through the network are compensated by an alignment training wherein the delays from each remote station are measured at a Central station. The Central station determines how much delay to insert at each remote station and then instructs the remote stations to insert the delays. This allows all inbound data to be aligned in time so that when the data are combined within the network by the Multipoint Junction Units (MJU) data errors are not produced. Aligned frames are combined in the MJU operating in data mode in a logical AND operation so that marks transmitted by inactive ports are combined with data from active ports to produce a composite signal which is passed to the Central DSU.
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