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Summary:This invention provides one POS system for tax control data monitor method, which comprises the following steps: directly connecting one single machine top case device between POS machine and printer and the top case is connected to the tax control servo through network; when starting system, POS top case getting network control right to judge whether to permit POS work, if yes, then transferring it to POS machine; if not, then stopping switch POS network and receive POS print order.
Bibliography:Application Number: CN200510044496