Since there is no reason to answer this in pm (it defeats the purpose of a board like this), Ill post it here:
les say i want to start a wireless isp for about 10-20 households starting out maybe get bigger as we go. I could sell them the router and equipment. How would i limit their bandwidth and certain things? Also what else would i need maybe a t3? i have 3 comps at my house right now ranging from
gateway 233mmx 4gb hd'
dell 1.9 80gb hd 512rdram
mine 1800+ 80 gb 256 pc2100(Is mine and i could use it for whatever i want
What else would i need? More hd for email setup and other stuff basiclly this would be an out of basement operation for a bit of money. I know of atleast 10 people who would like to recieve broandband ne way they want. a t3 costs wat? so i could get the service for like40bux a month plus setup and stuff?
For that many users a t3 is out of the question. You dont need 45(?)mbit/s for 20 people. It would be nice

, but the price would be very prohibitive. I dont have numbers, but I would say several thousand per month. A t1 can be had for under $1000USD/month in some areas. That is 1.5mbit/s. Not the greatest, but its better than 56kbit. You would probably want 2 t1's for redundancy (dont use the same isp!), but if your users understand that stuff happens, it wouldnt be necessary to start. You will also need all of the hardware that goes along with that, ie router.
Limiting bandwidth can be expensive. There are few cheap ways to do this. One I know of though, is ALTQ. It will run on OpenBSD and problably linux and FreeBSD. It would take a little work to get it configured well, but it is a solution.
Look at getting server machines. Some Dell Power Edges or equivelant. If you want it to be cheaper, build twice as many machines as you will need, or atleast keep plenty of spare parts around. A nice support contract is the best way to go, but sometimes you just cant. Plan for the worst though. Redundancy. I recommend p3 systems because they are basically tried and true, but most any system with quality hardware will work well.
There are free RADUIS packages out there, but I have never used them (or any RADUIS system for that matter). There are other alternatives out there too, but I cant think of them off the top of my head. You can get hardware to do this for you, or setup a small linux/BSD machine to do it cheaply.
For a mailserver, you would probably want SCSI raid, or atleast HARDWARE ATA raid. SCSI is preferable, but with that small number of users a good 3ware card doing raid 5 should work fine on a Linux/BSD system running sendmail/postfix/exim/qmail.
Load all systems with as much ram as you can. This is more important than raw cpu power (almost always is).
A good cisco switch would be perfect. Managed switches would be your friend. Cisco aireonet(sp?) wireless devices would be the best bet. They are more expensive, but they are considered some of the best wireless equipment out there.
Dont forget about a secure location for everything, webserver if you want to have a site or offer sites to your clients, and maybe a ticketing system to help keep track of problems (#1 problem with a lot of places is communication, which includes logging all changes/fixes). Also redundant power setups can be nice. Not to mention people to answer the phones and monitor your setup 24/7.
phew! Thats a start for you
