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51单片机控制tc35西门子TC35i AT指令集的详细说明文档。包括Standard V.25ter AT Commands、传真指令、GSM07.07指令集、以及西门子增强AT指令集说明。-51 SCM tc35 Siemens TC35i AT commands set the detailed documentation. Including the Standard V.25ter AT Commands, fax orders, GSM07.07 instruction set, a