Program update in duplicated switching systems
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United States of America Patent
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Jul 5, 1988
Grant Date -
N/A
app pub date -
Dec 20, 1985
filing date -
Dec 20, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A time-division switching system including first and second control units operating in accordance with a generic program is disclosed. After a new generic program is stored in the second control unit, the first control unit still operating in response to the old generic program initiates the performance of a test sequence by the second control unit. The first control unit times the execution of the test sequence. When the test sequence is not completed within a predetermined period of time or when test results generated by the test sequence do not match expected test results, a failure message is generated. Alternatively, when the test sequence is completed within the predetermined period of time and test results match the expected test results, a success message is generated.
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