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(12)    &L0 Select dial up line operation.选择拨号上线操作
&Mn -Asynchronous/Synchronous Mode Selection  异步/同步选择
   &M0 Select direct asynchronous mode.
   &M1 Select sync connect with async off-line command mode. *
   &M2 Select sync connect with async off-line command mode and
      enable DTR dialing of directory zero. *
   &M3 Select sync connect with async off-line command mode and
      enable DTR to act as Talk/Data switch. *
&Pn - Select Pulse Dial Make/Break Ratio  脉冲拨号断续比
   &P0 Set 10 pps pulse dial with 39%/61% make/break.
   &P1 Set 10 pps pulse dial with 33%/67% make/break.
   &P2 Set 20 pps pulse dial with 39%/61% make/break.
   &P3 Set 20 pps pulse dial with 33%/67% make/break.

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