Finding copied sim cards
作者： Jaana Hurme
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摘要: A method and apparatus implementing the for detecting copying of an international mobile subscriber identity (IMSI) in a communication network which location stations (MS) is updated at least one register (HLR, VLR) network. According to method, number (N) type updatings (advantageously inter-MSC) monitored within predetermined monitoring period (e.g. 24 hours). This compared threshold value (NMAX), if exceeds signal indicative exceeding will be generated.
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