Modem 常用AT指令集

作者: 来源:网络文章时间:2005-12-16 23:42:59

Modem 常用AT指令集(13) &Qn - Sync/Async Mode 同步/异步模式
   &Q0 Select direct asynchronous mode.
   &Q1 Select sync connect with async off-line command mode. *
   &Q2 Select sync connect with async off-line command mode and
      enable DTR dialing of directory zero. *
   &Q3 Select sync connect with async off-line command mode and
      enable DTR to act as Talk/Data switch. *
   &Q4 Select Hayes AutoSync mode.
   &Q5 Modem negotiates an error corrected link.
   &Q6 Select asynchronous operation in normal mode.
&Rn - RTS/CTS Option  RTS/CTS选项
   &R0 CTS tracks RTS (async) or acts per V.25 (sync).CTS跟踪RTS或遵循V.25
   &R1 CTS is always active.CTS一直有效

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