I'm trying to set up a tiny network between 4 buildings using 828s at each building with a 6015 joining them. I have no need to go anywhere other than between the 828s (no uplink to the rest of our network, or the internet for that matter). All I can get my hands on at this point are the four 828s and the 6015, so I have no ATM uplink... Is this something I can overcome? Suggestions would be GREATLY appreciated! Thanks!