| 摘要 |
It is object to provide a memory system for reliably detecting an error, if any, in management information that is read out. The same content of telephone number data is stored in memories 8, 9, 10. When telephone number data is read out of the memories 8, 9, 10, a comparing section 20 judges if all the contents of the telephone number data are the same. If not, a parity error detecting section 22 performs parity check of the telephone number data and excludes the content from which a parity error is detected as an object not to be processed thereafter. After the parity check, an object-to-be-processed determining section 24 determines whether or not there is any telephone number data in the majority on the basis of the criterion that the sum of the pieces of the telephone number data that is read out. If there is not such telephone number data, it judges that there is an error.
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