"Alan" <agarny@gmail.com> hath wroth:

>Do I have to spell it out every single time?

I agree with John and Mark. You descriptions are somewhat difficult
to decode. However, you finally described the problem clearly in the
next paragraph.

>You are not answering my question. I have both of my ThinkPads
>running, none of them being used for any internet traffic at all, yet
>within a couple of minutes or so, they will both lose their connection
>(see my definition of that above). Now, if I have one ThinkPad running
>only, I can do whatever I want with my internet connection, no problem
>things will be working just fine, but as soon as I start using my
>other ThinkPad, then both ThinkPads will lose their connection (again,
>see my definition of that expression above). So, what kind of non-
>Internet related load could get my two ThinkPads to lose their
>connection?

Kinda sounds like a duplicated IP address. Let's do some diagnostics
and see what happens. On *BOTH* laptops, run:
Start -> run -> cmd <enter>
ipconfig /all | find "Address"
You should get something like:
C:> ipconfig /all | find "Address"
Physical Address. . . . . . . . . : 00-02-B3-1E-43-17
IP Address. . . . . . . . . . . . : 192.168.1.11
Both lines should be different on the two laptops.

If the Physical Address (MAC address) is the same, the two computers
were setup by cloning and have the same MAC address in the registry.
That won't work, but is also improbable as the T42p and X41 laptops
are quite different. Worth checking anyway as there are some
utilities that do the same thing.

If the MAC addresses are different, but the IP Address is the same,
then you have a static IP address setup on one or both machines which
will need to either change, or be converted to a more usable DHCP
assigned IP address.

That fact that a 3rd laptop works just fine (probably because it is
properly configured) leads me to suspect that the problem is in the
DSL-G624T and not in the laptops. Any chance you have more MAC
addresses configured in the filter than you have DHCP assigned IP
addresses available in the IP address pool?

Are you using a RADIUS server for authentication? Probably not as
you're using MAC filtering which is largely a waste of effort.
However, if you are using a RADIUS server, any chance that it has some
manner of authentication user limit?

It's also possible that the router is configured to only allow a
limited number of wireless connections, or some other form of
misconfigured security.

Can you plug the two laptops into the network using ethernet CAT5
cables instead of wireless? If so, do they co-exist?

There are some other obscure misconfigurations and combinations
possible, but let's check the easy stuff first.

--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558