>Can anyone explain to me how to make a "Null modem cable". I have the pin
>assignment for my serial ports, I just need to be SURE what to connect to
specifications you need (i.e. 9-pin male to 25-pin female cross-over 6'
RS-232 cross-over cable). Most people don't make the typical serial cables
(I would guess that you may need soldering and molding equipment). Buying
the type you need or using a device as mentioned below is typically much
A couple of good alternatives exist if you do not need a permanent cable.
You can purchase a "break-out box" or something like a Micropatch(TM). A
breakout box offers all the capabilities to monitor and set up a RS-232
connection as needed. They can cost over $100 for a good one. A Micropatch
is a small adapter that allows you to wire one side to the other any way you
want. I think they cost about $20. These are particularly handy.