Attachment to router?
My AT&T tech recommended I attach the Apple Airport Express to my AT&T router for better performance. What cable do I use and to what port?
MacBook Air, iOS 8.1.3
You use an ethernet patch cable.. cat5e or cat6.. but just ask for a patch cable of the length and color you need in any large computer store.. anything will work.
WAN port on the Express to LAN port on the AT&T router. (WAN marked with sunburst symbol on airport).