9針串口到25針Modem連線

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電纜兩端的(de)到計算(suàn)機的(de)插頭是 9 針母插頭:

9 PIN D-SUB FEMALE
到 Modem 的(de)一頭是 25 針公插頭:
25 PIN D-SUB MALE

引腳定義

 

  Female Male Dir
Shield   1 ---
Transmit Data 3 2 -->
Receive Data 2 3 <--
Request to Send 7 4 -->
Clear to Send 8 5 <--
Data Set Ready 6 6 <--
System Ground 5 7 ---
Carrier Detect 1 8 <--
Data Terminal Ready 4 20 -->
Ring Indicator 9 22 <--