portable generator. Other 120-volt PSU backup solutions (e.g., Uninterruptible Power Sources [UPSs] and Duracell®
Standby Power Plugs) may be available at certain home and electronics stores.
If you have any additional questions, please call 800.288.2020.
If you have a Wi-Fi Gateway (WG)
The WG is located inside your house and uses electrical power to deliver all your AT&T services. The backup battery
unit for the WG must be installed inside your house within approximately 5 feet of the WG and should be
easily accessible.
Backup Battery for WG:
Your WG battery backup should provide approximately four or more hours of backup
power, with one corded, single-line touch-tone phone connected to the AT&T Wi-Fi Gateway directly or through
your in-home wiring, and with no other equipment and no service other than AT&T Phone service drawing power
from the WG backup battery. Actual results will vary, depending on, among other things, battery age, usage
patterns, and environmental conditions, including temperature extremes and fluctuations. It takes approximately
18 hours at normal indoor temperatures to charge an initial battery after AT&T Phone is installed and/or after a
replacement battery is installed.
When to replace the WG backup battery
When the battery is low, the yellow LED on the front panel will flash and the audible alarm will sound every second.
You should purchase a new backup battery when this happens. The alarm will continue until the battery is depleted
and the unit performs a forced shutdown. The red LED on the front panel will flash and the audible alarm will sound
every two seconds when the battery has reached the end of its useful life — you must replace the battery as soon
as possible to ensure proper operation of the WG backup battery.
How to replace the WG backup battery
Disconnect the WG battery backup unit from power and any connected devices. Remove the battery door on the
rear of the device. Remove the battery from the enclosure; remove the wire connections from the battery. Connect
the new battery (black-to-black, red-to red); place the battery into the enclosure. Securely reconnect the battery door.
Replacement Battery Model Numbers
• APC: BGE90M
• APC: BR1500G
• APC: SMT1500
• China Storage Battery: CP1500AV-RT
Replacement batteries are widely available at:
• Belkin (AT&T recommended provider): Call 866.539.5791 or visit
belkin.com/gatewaybattery
• China Storage Battery
• Local hardware stores
• Batteries Plus
Note:
Locations where batteries are available are subject to change.
Backup battery specifications
• Type/Rating: 12V/7.2Ah
• Size: not to exceed 5.94” length x 2.56” depth x 3.7” height, with F2 Faston connectors
For more information:
visit att.com/batterybackup
If you have an Optical Network Terminal (ONT)
The ONT is a box that may be located on the inside of your premises, on the outside of your premises or in your
garage, where AT&T’s fiber network terminates. If there is an ONT mounted on the outside of your premises AT&T
provided the initial battery backup for the ONT power supply box. You are responsible for determining whether a
replacement battery for the existing ONT power supply box is needed and, if one is needed, for purchasing it. You
hereby agree to be solely responsible for determining when the battery backup requires replacement and for
replacing and recycling used batteries.
If there is an ONT located inside your premises, a battery backup will not be provided by AT&T. You are responsible
for determining if you require a battery backup, and if so, for purchasing it. You agree to read and follow all
manufacturer or vendor directions for the replacement and recycling of backup batteries.
If a power outage occurs, you will not be able to make or receive calls, including 911 calls, unless you have
backup power for both the ONT and the WG.
Backup Battery for ONT:
A new, fully charged ONT battery backup will provide four or more hours of backup
power. It takes approximately eight hours at normal temperatures to charge an initial or replacement battery.
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Battery Backup Information
