It appears that the important thing to do with the Quad-to-DPx4 switch is to use one odd and one even numbered port. The Quad defaults to 119 on odd and 110 on even ports. So, 1 & 2, 3 & 4, or even 1 & 4, 2 & 3 should work. Most convienent for cabling (dual RG-6) is probably 1 & 2 or 3 & 4.