Hello, I just bought a D-Command with an extension of 16 Faders. I did not have the ethernet cables and would like to know which cables to use please knowing that the two units will be plugged into a HUB where they will be alone and the hub will be plugged into my MAC PRO. I have conflicting info between crossover cables and straight cables. The cables, in my case, must be all straight, all crossed or both, and in this case how is the distribution done? Thank you for your help