Time division multiplex data transmission system
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United States of America Patent
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Mar 17, 1987
Grant Date -
N/A
app pub date -
Nov 23, 1983
filing date -
Nov 24, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A time division multiplex data transmission system. A particular time slot among those for data transmission is placed with alternation of different data modes such as '1' and '0' in a commanding station destined for issuing commands. The alternation of data modes is supplied to receiver stations together with other data. When alternation of data modes is detected at the particular time slot in the receiver station, the reception of one command signal from the commanding station is confirmed, while detection of disappearance of the alternation of data modes indicates other command. Since a fault in the data transmission system results in generation of a fixed data mode or level such as '1' or alternatively '0', the alternation of data modes and disappearance thereof can define the commands discriminatively from the state brought about by the fault. Fail-safe feature can thus be realized.
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