So Nixdorf liked using Racal and Quattro (which were just badged by them) modems.
I think they were set for 1200 baud with 1 start, 8 data and 2 stop bits giving an 11 bit word. I know that over the years we tried to use other much cheaper modems and could never configure them correctly.
They...
I run the website 8870Adventures.com
From left to right your system contains the chassis PSU.
There are three plates (boards) stuck together. The left two are the CPU and I think will be a 1537 in your system. The black 25 pin cable goes to the status display and the other connector allows for...