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other countries. AT&T, the AT&T logo, and all other AT&T marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. ©2012 AT&T Intellectual Property. All rights reserved.
Need more help?
Visit att.com/support for videos and online tutorials or call 1.888.321.2375 (in AL, FL, GA, KY, LA,
MS, NC, SC, TN) or 1.877.722.3755 (in all other states).
Specific Issues
What if I have a monitored security system or health alarm?
When you have completed the installation, please contact your alarm
monitoring provider to test your alarm.
What if I have a cable or dial-up modem?
Cable and dial-up modems are not compatible with AT&T High Speed Internet
service. DSL equipment can be purchased at att.com/equipment
Why do I need to install filters?
Filters are only required for customers with voice service on their DSL line
due to both the regular phone line and DSL signals carried over the same line.
Without filters you may experience disruptions or hear static on phone line.
Installing a filter on every phone device shared with DSL will help eliminate
pitched tone or static noise.
Note: Filters are not necessary for customers without voice service on their
DSL line.
What if I hear static on the DSL phone line?
Make sure filters are properly installed on all phone jacks with a connected
devices (including wall-mounted phones). You can purchase additional
filters (including wall-mount filters) at att.com/equipment or most
electronics stores.
How can I get rid of the Detecting Proxy Settings Internet browser notice?
Run the Internet Connection Wizard.
In Internet Explorer® 7, you can find this wizard under Tools > Internet
Options > Connection Setup. When prompted to enter proxy settings, do not
select anything.
In earlier versions of Internet Explorer, you can find this wizard under Tools >
Internet Options > Connection Setup. When prompted to enter proxy settings,
do not select anything.
How do I upgrade from AT&T Dial Internet Service?
During registration, simply enter your existing AT&T email address (Member
ID) and your account will be updated automatically. If you do not register with
your existing AT&T email address (Member ID), you must call AT&T to cancel
your AT&T Dial Internet service or you will have duplicate accounts.
What if my previous AT&T service is suspended?
Call Customer Service at 1.877.722.3755 or (1.888.321.2375 in AL, FL, GA, KY,
LA, MS, NC, SC, and TN) to reactivate your account.
Need to update your equipment?
Call 1.888.573.4147 or visit att.com/equipment
Get Started Gather information:
Page4_ATT166_BYO_Modem_Release
Page1_ATT166_BYO_Modem_Release
AT&T High Speed
Internet Service
Self-Installation Guide for Modem
Gather Materials
Data Cable
(Color may vary)
Ethernet Cable
(Color may vary)
Power Adapter
(Color may vary)
DSL Modem
Required equipment
Your equipment may differ in appearance from these illustrations.
NOTE: Cable and dial-up modems are not compatible with AT&T High Speed
Internet service. Correct equipment can be purchased at att.com/equipment
If you have AT&T equipment that is
more than three years old, you may
experience problems. To purchase new
equipment, contact AT&T at 1.888.573.4147
or go to att.com/equipment
Dual-Port Filter*
(Necessary only if you have a
phone device using the same wall
jack as your DSL modem)
Single-Port Filters*
(You need as many filters as you
have phone devices in your home)
* Filters are not necessary if you do not have voice service on your DSL line.
The CD will take you through
the installation process.
If you need further assistance, refer to
the instructions on Manual Installation.
Install CD
Turn on the computer you will be using with your
AT&T High Speed Internet Service and insert CD. The
CD will install the correct settings for your equipment.
Installation
CD
Watch the video to learn
how to install your service!
Download the free AT&T Code
Scanner on your mobile phone at
http://scan.mobi or your app store
and click on the link to start the video.
Supplied equipment
Having Trouble?
Many issues can be resolved in four simple steps:
Check your connections.
Make sure that the filters and cables on each device are connected and installed properly as described in Step A-F.
Cables usually make an audible click when securely attached. If all connections are secure and you are still unable to
connect to the Internet, try another phone jack. If you have voice service on your DSL line, verify that the phone jack
has a dial tone.
Filters are not required for customers without AT&T phone service. A filter installed where it is not needed may eliminate
your DSL signal.
Power down, then power back up.
Shut down your computer, and unplug the black Power Adapter (and any other devices) from the back of the Modem/
Gateway. Wait 15 seconds, and then plug Power Adapter back in. Make sure the Modem/Gateway Power light comes on
(if not, try another outlet.) If your equipment has a Power button, turn it on. Turn your computer (and any other devices)
back on.
Wait for indicator lights.
Wait for indicator lights to turn green (may take up to 15 minutes), and then attempt to access the Internet. Modems
vary by manufacturer. For details about the correct light display for your equipment, see the manufacturer’s user guide.
Reset your modem.
Using a pen or pencil, press and hold your modem’s Reset button again for at least 10 seconds to clear the settings.
You will need to manually enter your settings into your modem. See the Check Modem Settings section.
1
Service Activation Date
(located on your confirmation letter or packing slip)
You can only connect to the Internet after your service
has been activated. This may take until 8PM on your
Service Activation Date.
1
Your Account Information
(located on your confirmation letter or packing slip)
• All customers: Your AT&T High Speed Internet
telephone/account number
• Existing members: Your primary AT&T e-mail address
(Member ID) and password. (Your password is NOT
located on your confirmation letter/packing slip.)
2
1
2
3
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