I have inherited an opt61 with all of the left slots of superloops have something occupying them.I am fiber expanding two IPE's. does this card need its own 4 network slots?? I have 2 of these cards and I just used one on SUPL 4 left side. I tried to setup the second card on the right side of SUPL 4. I am at a loss. If I am stuck then what is the wise step in expanding this switch? opt81??