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介绍了怎样运用限呼、主叫号码甄别、中继等交换数据的制作,用以降低固定电话诈骗的接通率。从而达到减少近期电话诈骗的犯罪发生率。
Describes how to use limited call, caller ID screening, relay and other exchange data production, to reduce the fixed-phone fraud rate. So as to reduce the incidence of crime of recent telephone fraud.