🚀 go-pugleaf

RB> . pins 2 and 3 were cross-connected.
  > . pin 4 on one was connected to (6 *and* 8) on the other, (& vice versa)
  > . pins 5 were connected.
  > . pins 1 7 and 9 were left unnconnected.
  > . Pin 7 is supposed to be signal ground, so to compensate I clipped
  > . a jumper from one metal chasis to the other.

There are many incarnations of null modem cables.  If you want a "max"
async null modem, do the following.

         25 Pin                                   9 Pin
        A       B                               A       B
       ___     ___                             ___     ___
        1       1       Chassis Ground
        2       3       SD  to  RD              2       3
        3       2       RD  to  SD              3       2
        4       5       RTS to  CTS             7       8
        5       4       CTS to  RTS             8       7
        6       8,20    DSR to  CD, DTR         6       1,4
        7       7       Signal Ground           5       5
        8,20    6       CD,DTR to DSR           1,4     6

If you have to choose between using the Signal Ground or Chassis Ground
on the 25 pin cable, use the Signal Ground.  But you should really use
both.

        D/
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 . QMPro 1.0 41-3345 . Bring back A-N airways!!    Dick.Zeitlin%acc1bbs@ssr.com