Diagrama de Se¤ales del RS-232
                      YO5BYV y EB7CJO

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N§ Pin               Se¤al    Descripci¢n                E/S
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 DB-25 <--> DB-9
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   1                 -        Chassis Ground              -
   2   <-->   3      TxD      Transmit Data               S
   3   <-->   2      RxD      Receive Data                E
   4   <-->   7      RTS      Request To Send             S
   5   <-->   8      CTS      Clear To Send               E
   6   <-->   6      DSR      Data Set Ready              E
   7   <-->   5      SG       Signal Ground               -
   8   <-->   1      CD       Carrier Detect              E
  15                 TxC      Transmit Clock              S
  17                 RxC      Receive Clock               E
  20   <-->   4      DTR      Data Terminal Ready         S
  22   <-->   9      RI       Ring Indicator              E
  24                 RTxC     Transmit/Receive Clock      S
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