LARTC - Mar 2005 - Clear channel

I set up a wireless ISP. I will get a clear channel 512kbps. There is
lot of information about traffic control in asymetric(shared) channels
like ADSL and Cable internet access but notthing about traffic control
in a clear channel. Any ideas???? any scripts??? or web sites????
something else... how many customers can i  deal with in that clear
channel of 512kbps???? i mean contention??? or reuse????
Hugonik