Custom made cable in limited quantities. This is a cable that rotates the pins from end to end. Referred to as a TX - RX cable, TX cross RX, mini din cross cable, crossover cable etc.
It is NOT a straight through cable!
Some of the devices we know it has been used on are:
Apple Macintosh Image II Printer
Dakota sound card by Frontier Design
Hammond XM-2 didi modules
And many others. 3 ft lengths. Black cable color. Lifetime warranty for manufacturing defects.
1-2 2-1 3-5 4-4 5-3 6-8 7-7 8-6