Cross channel circuit for an electronic system having two or more redundant computers
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Aug 14, 1984
Grant Date -
N/A
app pub date -
Jun 11, 1982
filing date -
Jun 11, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electronic system, such as a telephone exchange, including at least two, redundant computers. One computer is operated in the active mode while one or more are maintained in a hot 'standby mode' in readiness to take over the tasks of the active computer if this computer should fail. At least one 'cross channel circuit' is provided for updating the memory of the standby computer(s) in accordance with changes made in the contents of the memory of the active computer. The cross channel circuit changes the contents of the memory of the standby computer only at addresses which are within a prescribed, contiguous range of addresses.
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