Strange provider needs me to limit bandwidth

[Alejandro Borges <alex@sogrp.com>]

My bw providers wants me to limit my 128kb connection because thats what
i paid for...he is right, he said that to pay me for the work of doing
it myself he gives me permission to take hold of the whole T3 on
weekends (im connected through a wavelan card and a big antena)... so
its a cool deal, but the problem is that i dont know how to limit
bandwith.... i saw something in the kernel but it was in the QOS
section, so i dont think thats the good one.....

Any ideas on a good program or kernel module i can use for this?

Alex