Problem solved - it turns out that one of the "black boxes" the Optical RS 232 link was bad. We ended up buying a 50' wire cable to hook directly...
Unfortunately I only see 1 cable going from the computer to the console in this order: There is a 9 pin to 25 pin adapter, then the "Black box"...
I am having the exact same problem - Fiber cable is broken, no replacement cables can be found. Did you have to configure some settings on your...