I have 3 connections at home. Unifi, Maxis 3G and Celcom 3G. Each have their own WAN interface. I see this device have 5 ports. Can set 2 ports as LAN for connection to switch and AP and another 3 ports as WAN for the above connections before shipping? I would like all 3 WAN to work together. Can combine all 3 connections as 1?