Wireless Home Phone (“WHP”) device is a mobile device that
may be used with home phone equipment in different locations
in the U.S. WHP device requires a battery to be installed in the
device at all times to operate. In the event of a power outage,
the battery can be used as a back-up battery. However, a
landline phone requiring separate electric power to operate
(e.g. cordless phones) connected to a WHP device will not
place or receive calls (including 911 calls) during a power
outage. For emergency calls, you may have to provide your
location address to the 911 operator. Landline home phone
equipment is not included. Provides voice service only. Not
compatible with data or messaging services, home security
systems, fax service, medical alert systems, medical monitoring
systems, credit card machines, IP/PBX Phone systems, or
dial-up Internet service. May not be compatible with your
DVR/Satellite systems, please check with your provider. DSL
customers should contact their provider before transferring a
phone number to ensure uninterrupted DSL Internet service.
WHP device is sold for use on the AT&T wireless network and
cannot be activated on other carriers’ wireless networks. If your
WHP device is roaming, AT&T’s off-net usage restrictions apply.
No part of this publication may be excerpted, reproduced,
translated or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without the
prior written permission of
ZTE Corporation.
The manual is published by ZTE Corporation. We reserve
the right to make modifications on print errors or update
specifications without prior notice.
Version No.: V1.0 Edition Time: May 2015
Manual No.: 081704100370
Welcome to AT&T
Thank you for purchasing an AT&T Wireless Home Phone device
(Model: WF721). To get the most from your new device, check
out our videos and interactive tutorials at att.com/whphelp.
Welcomei
Contents
Getting Started ..................................................................................... 1
In the Box ........................................................................................... 1
Getting to Know Your Device ....................................................... 2
How it Works ....................................................................................6
Service port is designed for diagnostic purposes only, not
for customer use. Never place a USB-based device into the
Service port of the device under any circumstance. Doing so
may damage the device and negate its warranty.
Battery Cover
Antenna
Service Port*
LED Indicators
The table below describes possible states for each of the
LED indicators.
KeyIcon NameStatusCondition
Power
Voicemail
Battery
Charge
Wireless
Service
NOTE: A software u pdate is in progress wh en the Wireless Ser vice
LED is solid re d and all others are solid green.
Green SolidOn
OffNo power
Green Blinking
Off
Green SolidHigh
Green Blinking Battery in use (High)
Yellow SolidMedium
Yellow Blinking
Red SolidLow
Red Steady
Blinking
Red Rapid Blinking No battery installed
OffNo charge
Green Solid
(1 to 5 bars)
No Bars LitNo service
Red Blinking BarsCheck SIM
Red Solid BarsSoftware updating
New message
waiting
No messages
waiting
Battery in use
(Medium)
Battery in use (Low)
Signal Strength
(Low to High)
2Getting Started
Getting Started3
How It Works
The Wireless Home Phone device uses the AT&T cellular
network to provide phone service to your cordless or corded
home phone(s). Place it anywhere in your house where you
have a wireless signal. It does not require the use of a home
phone wall jack like traditional home phone service.
The Wireless Home Phone device provides many calling
services, such as voicemail, Caller Number ID, Call Waiting,
Call Forwarding, and Three-way Calling for your home
phone(s).
Device Installation
Before You Begin
Your device works exclusively with the AT&T cellular network
and DOES NOT use your home phone wall jacks.
Your device should be located:
• Where you have a strong cellular signal, typically near a
window or outside wall. Signal strength may vary in different
parts of your home.
• Near an electrical wall outlet.
Select which phone(s) you will use with the Wireless Home
Phone device:
• A cordless phone system with multiple handsets should be
used to place phones throughout your home.
• If using an existing phone, unplug it from the wall jack.
Install the Battery
1
Insert the battery.
Note: Battery must be installed at all times for your
Wireless Home Phone device to operate.
Install the battery cover.
NOTE S
• The battery must be installed at all times for your
• Charge time may be impacted by environmental factors,
:
Wireless Home Phone device to operate properly, even
when plugged into a power source. It may take five (5) hours
to fully charge (battery will charge inside the device while
connected to a power supply).
and the battery will stop charging when the ambient
temperature is outside of the temperature range allowed
for charging (32 °F – 131 °F).
4Getting StartedGetting Started5
Turn on Your Device
24
Plug the power cord into an electrical wall outlet that is
not controlled by a wall switch.
Insert the small end of the power cord into the round
Power Input port on the back of your Wireless Home
Phone device.
On/Off
Slide the On/Off switch to the On position.
Check the Wireless Signal
3
Raise the antenna to an upright position and check the
signal strength.
More green bars indicate a stronger signal. Your device
can be relocated in your home for best performance.
Signal
Strength
Connect the Device to a Phone
1) Unplug your phone
from your home
phone wall jack.
IMPORTANT: DO NOT plug the Wireless Home
Phone device or your phones into your wall jacks.
2) Plug your phone into the
“Phone 1” port on the
Wireless Home Phone
device, using your existing
phone cable or included
phone cable.
6Getting StartedGetting Started7
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