My old modem would crash my computer playing Diablo2 online at anything at or above 135 fsb... 134 worked fine... you likely use good hardware, not the cheap $10 modems...
I got rid of that sucker...
<font color=red><b>NF7-S/Mobile Barton 2600+
211x11.5 1.824v SLK900A
1GB Corsair XMS PC3200
Sapphire 9500np@9700np</font color=red><font color=black>
512MB XMS PC2700