| If I comprehend your PDF correctly, all you would need between the locations in the large installation example are routers with VPN support (take a look at Adtran's Netvanta series w/Adv. Sec. Pack for low $$). The links between the sites would terminate on each end at the routers. Instead of the site-to-site links in the example being a private WAN such as frame-relay, they would be replaced with a connection to the public internet - DSL, frame, T1, whatever. |