The LMU2 cards were only used with stacked cabinets using MPB2 or MPBE processors. The LMU3 goes in place of the processor card in the fourth cabinet. The cable runs between the MPB and the LMUE cards in the first and fourth cabinets, respectively. That's the reason that it is longer than the traditional 1' cable used on the other LMUs. It might not be 8 feet, but it's definitely a few feet long.

I had a similar issue with STS expansion cabinet cables. We had a situation with zero room for the expansion cabinet, so we extended it with a 5' double-ended cable, but had nothing but phantom problems after that.


Ed Vaughn, MBSWWYPBX