you can buy them from vertex, not sure if that is the right spelling, i think they are owned by thyssen. the orange cable is a rs485 to rs232 converter cable. you could also get this at some local electronic stores i believe. any one correct me if i am wrong. i think you also need to reconfigure your com port when you use this cable. i remember seeing a program on a thyssen laptop where you would click the icon to run the switch to rs485 program before plugging in the cable to a dmc. i believe you can also do it manually, not exactly sure what the program is doing, but i remember seeing it access the device manager section of the computer and change something there.