Reach DSL authentication dropping

Contact AT&T, Looks like a signal or modem issue. They have a way to test from their end to your modem.

There's a lot of possiblities here.If you have a DSL/dialtone lineshare,listen for noise on the line(humming,crackling static,dropped calls).If you have a dry loop(DSL only),connect a phone in place of the modem and see if it has an "intercept" message(like "you have tried to call a number out of your service area" or something like that).If it does,you can use a phone to check the line when the DSL drops(don'touforget to put an inline filter on it).If the DSL light doesn't go out when the Internet light does,it is NOT a problem with the physical line.This would be an issue with the modem or the equipment at the serving end.( I am a DSL tech,and spend lots of wasted time diagnosing and trying to fix problems that are beyond my reach(central office server issue) or that I didn't need a dispatch for(it is cheaper to send a new modem than to send a tech).

Make sure that the DSL light of your modem is on. Because if not, even if you have the correct modem sey up still it will not communicate with your DSLAM. There should be an active connection to make it work. So better contact your ISP or internet provider for that.

This likely means that your DSL modem is not trained up with the DSLAM. - Geek talk for your modem is not connected to the phone company's equipment properly.

1.) Remove power from the modem

2.) Remove all devices (including the DSL modem) from all phone jacks in the house.

3.) Add the DSL line back to the wall jack, taking care to plug the wall jack into the correct jack on the DSL line. (Do not use a DSL filter on your modem!)

4.) Power up the modem/

Still not working? Continue...

5.) Try a different phone jack

6.) Try a new phone cable between the wall jack and modem

7.) Call the phone company for further assistance.

If you can try the modem on a KNOWN working DSL line, then do so! What you want to do is confirm that the problem is, or isn't with the modem itself. Also, if you have access to a good, working DSL modem, that would help resolve the issue.
BTW - DSL modems are fairly cheap, you can pick one up at Best Buy.
From there, if the modem is bad.... you'll have to replace it. If it's a DSL issue, AT&T will have to resolve the issue with your line.

You need to hold the reset the device. Most hardware get back to factory defaults once they are reset . That should help
Thanks
Ranjit

Have a look at this link:
http://www.epinions.com/review/Westell_Wirespeed_LiteLine_ADSL_Modem_NAT_Router_Ext_Ethernet_USB_AutoSense_with_Filter_Kit_B9961001002/content_420669853316
Usually slow or dropped connections occur when the modem is having difficulty communicating with the DSLAM in the exchange. This is usually due to line 'noise'. If your line has external noises they will interfere with the data and cause corruption therefore dropping the line or slowing valid data transmission. Check that all devices connected to your phone line have filters, phones, faxes, back to base alarms etc.

Maybe you can try to check your fire wall setting,sometime antivirus is blocking your camera through internet access.you can add your camera for exemption for blocking in the iternet.

DSL connection:

Computer -> Router(Dlink) -> DSL Modem -> Telephone wall jack/outlet

OR

Computer -> DSL Modem -> Telephone wall jack/outlet

PPPOE = using a username/password combination to authenticate the connection to the ISP.

Is there a reason why the Sonicwall needs to do the PPPOE auth? You should be able to let the modem do the PPPOE connection and have the Sonicwall behind it. The Sonic wall will get a private IP address. Andy