Method of preventing data inconsistency between master exchange data and backup exchange data
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United States of America Patent
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-
Sep 3, 2002
Grant Date -
N/A
app pub date -
Nov 20, 1998
filing date -
Mar 21, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to preventing inconsistency between the data maintained in a master exchange and a backup exchange in a telecommunication system. To ensure a reliable data distribution, the system maintains a copy of the master exchange data in a slave exchange. When the slave exchange receives data from the master exchange or the backup exchange, the received data or the corresponding data previously stored in the slave exchange is selected for use on the basis of comparison of the information included in their update information. That is, the data stored in the slave exchange is sent to the exchange having sent the received data if the data stored in the slave exchange is selected for use; the received data is sent to the master exchange if the data received from the backup exchange is selected for use; and the received data is stored in the slave exchange if the received data is selected for use.
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