jamesmgregg68@gmail.com wrote:
> I have an AT&T wireless router hooked up to my Comcast cable modem, and
> am accessing it using my Dell Inspiron 600m laptop's Centrino card.
> I've never had any problems until last night, and this one is very odd
> to me...here are the details:
>
> 1. 7:30pm, checked email and surfed Web, no problems
> 2. 7:45pm, closed lid (system standby) and took unit downstairs
> 3. 7:50pm, re-opened lid, wireless card found my router but would not
> send/receive data (email = "mail server not found," browser "page
> cannot be found")
> 4. Took unit back upstairs thinking I was too far from the router and
> it couldn't get a good signal
> 5. Right next to router, same problem - wireless card connects
> automatically to the router, but does not send traffic through modem.
> 6. Power cycled all 3 devices and reconnected in order cable modem ->
> router -> laptop. Problem still present.
> 7. Called Comcast (ISP) - no issues on their end, checked all culprits
> on mine. Connected laptop direct to modem via ethernet cable, internet
> connection worked fine.
> 8. At the time, my router was not encrypted (lazy), so I thought maybe
> a hijacker was causing the problem. I went into my router and reset
> it, including a 128-bit WEP key.
> 9. Power cycled everything, wireless connection worked fine.
> 10. Closed lid of laptop again - 15 minutes later I came back, same
> problem - wireless card connects to router, but doesn't send traffic
> through the modem.
> 11. Plugged in ethernet cable direct to modem again, internet
> connection works fine.
> 12. Power cycled all 3 devices again, this time wireless card found
> the router and sent traffic through modem just fine.
> 13. Closed laptop lid again (system standby), opened it later and
> experienced the same problem.
> 14. Power cycled router only, did not fix - still connected to the
> router via wireless card but no traffic through modem.
>
> So it seems to be this intermittent loss of connectivity between the
> wireless router and the modem, even though they are securely connected
> with an ethernet cable, and it seems to only happen after I fire up my
> system again after going to "standby" and killing the wireless
> connection.
>
> The wireless card -> router connection seems to be fine, and
> The modem -> ISP connection seems to be fine.
>
> Any thoughts on what this could be?
> At this point I'm entertaining the following notions:
> 1) short circuit in the ethernet cable from router to modem?
> 2) wireless router is failing?
> 3) wireless card is failing?
>
> Thanks for any advice.
>

I would check to see if there is an upgrade to the router firmware and
if so install the upgrade.

Danny,