Why does my Dell D600 sometimes drop the wireless connection?

Here are 2 problems I'm having re dropped wireless connections that
others are having as well. I hope someone here can help me solve
them, since the answers will help end the frustration of lots of
folks.

1. When I put my laptop in STANDBY mode overnight, in the morning, it
will not connect via my wireless router unless I first dial-up my ISP.
This does NOT happen if the laptop is in standby mode for a short
period
of time.

2. If I do a re-start, I'm almost always able to connect wirelessly
without first dialing up.

3. Sometimes I lose the connection with the router, even though the
signal strength shown on the machine is always maximum.

Both settings are in residential areas, and I have no reason to
believe there is any problem with the ISP (2 separate ISPs).

DETAILS:

1. This happens with 2 separate ISPs and 2 different routers. That
suggests that the problem is not the router or the ISP, but my laptop.

2. Hardware/Software details:

I'm using a Dell Dimension D600, running XP Home, V2002, SP1. I'm
using
a US Robotics PCMCIA card. When I tried to install SP2 some years ago
I
ran into a conflict of some sort and abandoned the effort.

There must be something that triggers the dropping of the wireless
connection. Anyone have any ideas?

And why is it that dialing up my ISP via my modem, and then hanging
up,
restores the connection?


.

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