Serial Cable

This is the way you need to solder your cable.

Crossed Serial Cable Pinout

           SGI-Mini-DIN-8       |               Sub-D 25
               (male)           |               (female)
  ----------------------------------------------------------------------
               6 7 8            | 13 12 11 10  9  8  7  6  5  4  3  2  1
               3 4 5            |   25 24 23 22 21 20 19 18 17 16 15 14
                1 2             |
  ----------------------------------------------------------------------
  DTR - Data Terminal Ready   1 |   6   DSR - Data Set Ready
  CTS - Clear To Send         2 |   4   RTS
  TD  - Transmit Data         3 |   3   RD
  SG  - Signal Ground       4,8 |   7   SG
  RD  - Receive Data          5 |   2   TD
  RTS - Request To Send       6 |   5   CTS
  DCD - Data Carrier Detect   7 |  20   DTR
                         Shield |   1   Protective Ground

Thiemo also said that it might be needed to have a connection between pin 20 and pin 8 on the Sub-D 25 connector to have your terminal do a carrier detect. Both numberings are done looking to the front of the connectors - not the soldering site ! (Note the male / female).