Digital transmission apparatus for subscribers having switching function from active transmission line to protection transmission line
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United States of America Patent
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Sep 19, 1995
Grant Date -
N/A
app pub date -
Aug 19, 1993
filing date -
Mar 10, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A digital transmission apparatus for subscribers, includes a switch function unit performing multiplexing into subscriber time slots by receiving as its input transmission signals communicated between subscriber side transmission lines and feeder transmission lines. The apparatus sets one or more lines among a plurality of feeder transmission lines as a protection transmission line with respect to an active feeder transmission line. A selector function unit performs a connection change-over of the path of the active feeder transmission line in which a transmission fault occurred to a protection transmission line preliminarily allocated to the related active feeder transmission line.
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