Be advised that some xDSL modems plug into a USB port. For example, I use Bellsouth ADSL, and the modem is an Alcatel Speedtouch USB. The phone line plugs into the modem, and the modem to the computer. Another phone line from the same wall jack goes to the phone, using an adapter. Line Conditioners are placed on the phone lines in the house that are <i>not</i> connected to the modem.
However, since I've got more than one system, and I'm networked, the configuration is slightly different. The phone line plugs into the modem, the modem into the router (which has two USB ports), and the router into a NIC card. Then, CAT 5 cable from the router to the second computer, which also has a NIC card. Both use the same modem and ISP account for 'Net access, via the router.
I've never had any problems with either setup, and the speed is the same. But I think the systems have greater stability with the modem plugged into the router, because the service used to get dropped occasionally, but not since the systems were networked, interestingly enough.
Might I suggest these websites for additional information on the subject:
<A HREF="http://www.dslreports.com/tweaks" target="_new">DSLreports.com</A>
<A HREF="http://speedguide.net/faq/index.php?num=3&f_id=2&s_id=" target="_new">SpeedGuide.net</A>
Toey
<font color=red>First Rig:</font color=red> <A HREF="http://www.anandtech.com/mysystemrig.html?rigid=17935" target="_new"><font color=green>Toejam31's Devastating Dalek Destroyer</font color=green></A>
<font color=red>Second Rig:</font color=red> <A HREF="http://www.anandtech.com/mysystemrig.html?rigid=15942" target="_new"><font color=green>Toey's Dynamite DDR Duron</font color=green></A>
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