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 MAPPING PINS BETWEEN 25 & 9 PIN CONNECTORS

 Correspondence between 9 and 25 pin connector pins and common (not
 official) signal names:

       +------------------------------------------------+
       | 9 pin          25 pin |  25 pin          9 pin |
       ------------------------+------------------------|
       |   1      CD      8    |    2      TD       3   |
       |   2      RD      3    |    3      RD       2   |
       |   3      TD      2    |    4     RTS       7   |
       |   4      DTR    20    |    5     CTS       8   |
       |   5  sig. grnd.  7    |    6     DSR       6   |
       |   6      DSR     6    |    7  sig. grnd.   5   |
       |   7      RTS     4    |    8      CD       1   |
       |   8      CTS     5    |   20     DTR       4   |
       |   9       RI    22    |   22      RI       9   |
       +------------------------------------------------+