Drop-and-insert multiplex digital communications system
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United States of America Patent
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-
Aug 28, 1984
Grant Date -
N/A
app pub date -
Dec 7, 1981
filing date -
Dec 7, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus for dropping and inserting digital data in a time division multiplexed, serial data stream. A communications link is divided into two spans with an electrical switch connecting the two spans. Data is used to derive channel-timing information defining the time divisions or strobes of each of the multiplexed channels. The strobe pulses are used to toggle the switch so that local transmit-and-receive channels may be inserted and dropped in accord with the channel strobe pulses. The same channel strobe pulses used for transmitting local data are used for receiving data from the multiplexed bit stream. In the absence of channel strobe pulses, the switch connects the two links.
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