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Modem 常用AT指令集(7) T - Set Tone Dial Default 选择音频拨号模式 Vn - Result Code Form 生成结果码 V0 Report short form (terse) result codes.汇报简要结果码 V1 Report long form (verbose) result codes. 汇报详细结果码 Wn - Connect Message Control 连接信息控制 W0 Report DTE speed in EC mode. W1 Report line speed, EC protocol and DTE speed. W2 Report DCE speed in EC mode. Xn - Extended Result Codes 扩展的结果码 X0 Report basic call progress result codes, i.e., OK, CONNECT, RING, NO CARRIER (also, for busy, if enabled, and dial tone not detected), NO ANSWER and ERROR.汇报基本进程结果码
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