Q. How are these companies able to accomplish wi-fi throughout all their floors?
A. We run ethernet from our router to each floor. Then on each floor we deploy (install) a Wireless Access Point (WAP.)
Some care is needed to setup the WAPs so the RF channels are say 11 on the top floor, 1 on the next floor and maybe 5 or 6 on the final floor.
As to outside runs of Ethernet the number one concern is to not turn it into a lightning rod. One could encase it in metal conduit and that metal goes to Earth ground.
I have a twc internet service. So far just a modem hard connected to my notebook. Since I live in a 4 four story townhouse, I want to have wireless service throughout. So, I purchased Linksys Wireless-N router and wireless-n card. I installed it on the 3rd floor. Unfortunately, there was very weak signal on the 2nd and 4th floors. The home has concrete floors, drywall w/ metal stud walls, and cinderblock frame.
I'm thinking of running wires. My question: Is there ethernet wire appropriate to hang outside the building? I would run from router location to each floor. I don't have access to inside the walls, and wouldn't even know how to do that myself. Just thinking is all.
Also, for wireless, what product(s) do you think would allow me to affordably access from all over the building. How are these companies able to accomplish wi-fi throughout all their floors? (not that I'm a major corp. with major money, but just in general how do they do it?)