OK, thanks.
In fact, I have problems on my home server, and watch a new upload bandwitdh stream, even when server is empty, growing to 900 kb/s !!!
Can I PM you, or I open a new thread ? (here it is for the "formula" - sorry)

In french: je comprends rien, à vide, mon server a un debit d'upload à 900 kbps, alors que par exemple, 1 joueur le fait monter à 10 kbps, 5-6 joueurs = 500 kbps.

Tests done with and without Punkbuster, OmniBots and jaymod 220 and chaos020