Modela Connecting usb to serial

Problem discription
We have the luxury problem that we have 2 models MDX-20 machines.

Main problem with these machines is that both are connected with a 'standard' usb to serial cable containing an FTDI chip.

On Windows they are alwais given the same unique COM-umber, but on Linux, depending on how they are initialized, they will show up as either ttyUSB0 and ttyUSB1 or ttyUSB1 and ttyUSB0

In this tutorial i'm going to use the udev-rules to alwais mount the same cable on the same /dev point so i can point the fab-modules to the correct path.

Solution
http://hintshop.ludvig.co.nz/show/persistent-names-usb-serial-devices/