so just to keep this topic alive, the customer went and got the whole setup from the CableTV company. What did they get?: a bunch of linksys/cisco 24 port switches, some Belden Pre-N router's with wireless capability (which can be setup as access points only) and they have like 5 cable modems. I don't see any routers. And that's it from what I can tell! Any guest who plugs in their computer or uses the wireless get's assigned a public IP! I don't understand why they are being given public IP addresses. It's a little strange in my opinion.

If I were to take this route and got some APs and switches together and did a NAT setup with DHCP from the router, would it work ( I say yes) but I am concerned about guest's using SMTP mail lack of compatibility. Am I on the right track.

Phone systems for NJ and NY businesses