Pixelnet universe 1/5 is on pins 1 & 2, Pixelnet universe 2/6 is on pins 3 & 4, Pixelnet universe 3/7 is on pins 5 & 6, and Pixelnet universe 4/8 is on pins 7 & 8.
Each Pixelnet universe is addressed 1 - 4096.
If you programmed a uSC to address 1 and set the jumpers on the hub to universe 2 then the effective address of that uSC would become 4097.
When you use the 'Smart String Grouping' software to program your uSC you will see two address numbers. For example I have an uSC programmed for Pixelnet address 12289 in the boxes under description named Current Start Channel and New Start Channel. If you have never programmed the device all you have to do is enter that address in the New Start Channel box. BUT if I look over in the 'Controllers' section under 'Hub-addr' I will see a value of one which is effectively the start address of the 4th Pixelnet universe of 1 - 4096. The program does the conversion of the Pixelnet address you enter in the New Start Channel to the correct address for that particular Pixelnet universe.
The Pixelnet IN/OUT is effectively pin 1 to pin 1, pin 2 to pin2 etc. The Jumpers just divert which ever pair of Pixelnet universe wires into the RJ45 matrix of connectors.
Any Ethernet cable that is not a null cable will be usable.
Oh yeah, dont forget to select the 'V4 controller' button to add in the device.
Does this help any?