AT&T TL7912 User manual

User’s manual
TL7912
DECT 6.0 cordless headset
and handset lifter

Congratulations
on your purchase of this AT&T product. Before using this AT&T
product, please read the Important safety information section
on pages 51-54 of this manual. Please thoroughly read this user’s
manual for all the feature operations and troubleshooting information
necessary to install and operate your new AT&T product. You can
also visit our website at www.telephones.att.com or call
1 [phone]. In Canada, dial 1 [phone].
Model number: TL7912 (Headset, headset base and handset lifter)
Type: DECT 6.0 cordless headset and handset lifter
Serial number:
Purchase date:
Place of purchase:
Both the model and serial numbers of your AT&T product can be
found on the bottom of the headset base and lifter.
Save your sales receipt and original packaging in case it is
necessary to return this product for warranty service.
© 2012 Advanced American Telephones. All Rights Reserved. AT&T and
the AT&T logo are trademarks of AT&T Intellectual Property licensed to
Advanced American Telephones, San Antonio, TX 78219. Printed in China.

Parts checklist
Check to make sure the headset package includes the following
items. Save your sales receipt and original packaging in the
event warranty service is necessary.
Cordless headset
with medium-sized
earbud attached
Battery pack
(battery with battery
compartment cover
attached)
User's manual
User’s manual
TL7912
DECT 6.0 cordless headset
and handset lifter
Quick start guide
Quick start guide
TL7912
DECT 6.0 cordless headset
and handset lifter
2 earbuds
Behind-the-neck bandOver-the-head band
Line splitter
2 over-the-ear hooks

Parts checklist (continued)
Auxiliary ring
detector
Telephone line cord Large lifter padlifter padpadHandset lifterlifter
Headset base
Anti-slip pad
USB cable
Headset base
power adapter
Corded phone
connection cable

Optional accessory
In this manual, there are references to TL7900. The TL7900
includes an expansion headset and a headset charger (up to two
headsets can be used with the same headset base).
TL7900 can be purchased separately. For more information about
the product, visit our website at www.telephones.att.com.

User’s manual
TL7912
DECT 6.0 cordless headset
and handset lifter

1
light status
Red On when the headset is charging in the
headset base.
Flashes every 10 seconds to indicate the battery is
low when the headset is not in the headset base.
Flashes three times to indicate the headset is
powering off.
•
•
•
Blue On when a fully charged and registered headset is
in the headset base.
Flashes three times to indicate the headset is
powering on.
Flashes twice every three seconds when the headset
is in use.
Flashes four times every four seconds when there is
an incoming call in PHONE mode.
Flashes every 10 seconds when a fully charged
and registered headset in idle mode is out of the
headset base.
•
•
•
•
•
Red and blue Flashes slowly when the headset is not registered.
Flashes quickly when the headset is trying to
register to a headset base or telephone base.
•
•
Off The battery is dead.
No battery is installed.
The headset is powered off.
•
•
•
Quick reference guide - headset
Headset lights
(On/off button and light)
Press to make, answer or end a call
(pages 31 and 32).
Getting started

2
Getting started
VOL+/VOL-
Push the volume switch
on the headset to the
right or left to adjust the
headset ringer volume
while in idle mode
(page 32) or the
listening volume while
on a call (page 35).
Earpiece
Microphone
The microphone
incorporates
noise canceling
technology for
clearer calls.
MUTE/FLASH
Press to mute the
microphone during a call
(page 36).
Press and hold for two
seconds to answer an
incoming call when you
receive a call waiting alert
during a call (page 33).
Press to mute the ringer in
the earpiece when there is
an incoming call (page 33).
Quick reference guide - headset
Battery pack
Open to replace the
battery pack.

3
Getting started
One short beep Headset key tone.•
One short beep
every 30 seconds
Muted headset microphone alert tone.•
Two beeps Error alert tone.
The ringer volume is at its lowest setting.
The listening volume is at its highest or
lowest setting.
Any key is pressed while the headset is
out of range.
•
•
•
•
Two low beeps Call waiting alert tone.•
Two rapid beeps
every 20 seconds
Low battery warning.•
Three rising beeps A conference call starts.•
Three rapid beeps
every 20 seconds
The headset is out of range.
The headset is not yet registered.
•
•
Ring tone Incoming call alert tone.
Ring back tone.
•
•
Three rapid beeps The headset is powering on or off.•
Quick reference guide - headset
Headset alert tones

4
Getting started
Quick reference guide - headset base
Magnetic charging mount
Place the headset here
for charging.
MUTE (light)
PAIR
Use to initiate headset
registration or deregistration.
PHONE (mode
button and light) PC (mode button
and light)
MUTE
(Red)
On when you are registering a headset.
Flashes when the mute function is in use.
Flashes when you are deregistering headset(s) from the
headset base.
•
•
•
PHONE
(Blue)
On when PHONE mode (default mode) is selected on the
idle headset base.
Flashes four times every four seconds when there is an
incoming call.
Flashes twice every three seconds when the headset is in
use in PHONE mode, or when there is a conference call in
both PHONE and PC modes.
Flashes slowly when a call is on hold in PHONE mode.
•
•
•
•
PC
(Blue)
On when PC mode (default mode) is selected on the idle
headset base.
Flashes twice every three seconds when the headset is
in use in PC mode, or when there is a conference call in
both PC and PHONE modes.
Flashes slowly when a call is on hold in PC mode.
•
•
•
Headset base lights

5
Getting started
VOLUME /MICROPHONE
Press the volume keys on the side
of the headset base to adjust the
speaking volume when on a call
(page 35).
CORDED HANDSET CONNECTED/
YES/NO
Choose the setting based on whether
you are using a corded handset
(page 13).
LIFTER
This jack is only used with the
handset lifter.
(USB port)
Open the port cover to plug in the USB
cable when in PC mode (page 23).
Quick reference guide - headset base

6
Getting started
Quick reference guide - headset base
TEL WALL JACK (red dot)
POWER jack (green dot)
CORDED PHONE CONNECTION
This jack (blue dot) is only used with
the corded phone connection cable
(page 14).
Corded handset audio adjust switch
This switch is only used when you have
connected the headset base to a corded
telephone (page 15).

7
Getting started
Switch hook presser
When the CORDED HANDSET CONNECTED
switch is set to YES, pressing on the
headset raises or lowers the switch
hook presser.
Lifter control cable
This cable is hard wired into the lifter
and plugs into the LIFTER jack on the
headset base.
RING DETECT jack
Plug in the auxiliary ring
detector (page 20).
ADJUST LIFTER knob
Adjusts the height of the lifter arm (page 17).
Lifter arm
Holds the corded telephone handset.
Quick reference guide - handset lifter
SENSOR ADJ knob
Adjusts the sensitivity of the ring detector (page 21).

8
Getting started
Small lifter pad
Holds the earpiece of the corded telephone
handset.
Adhesive tape
Remove the protective strips before
attaching the lifter to the telephone base.
STATUS light
On in red when the ring detector is off (page 9).
On in blue when the ring detector is on and
the headset not in use (page 9).
Flashes in blue four times every three seconds
when the ring detector detects an incoming
call (page 9).
Flashes in blue slowly when the switch hook
presser is raised and you are on a call
(page 9).
Quick reference guide - handset lifter
Internal ring detector
Detects the telephone ringer and sends a
ring tone to the headset earpiece.
RING ON/OFF
Press to turn the ring detector on or off. When the ring detector is
off, the cordless headset does not ring (page 21).
Switch hook presser adjustment knob
Adjusts the position of the switch hook presser
(page 17).

9
Getting started
STATUS light
Quick reference guide - handset lifter
Red On when the headset is not in use and the ring detector
is turned off.
Flashes slowly when the headset is in use and the ring
detector is turned off.
•
•
Blue On when the headset is not in use and the ring
detector is turned on.
Flashes four times every three seconds when the
ring detector detects an incoming call.
Flashes slowly when the headset is in use and the
ring detector is turned on.
•
•
•
Off The headset base does not have power.
The lifter control cable is not plugged into the LIFTER
jack on the headset base.
•
•

10
Getting started
Installation
See pages 11-12
for easy instructions.
You must install and
charge the battery before
using the headset. STOP!
Colored labels
The cords have colored labels that guide you to plug them into
the correct headset base jacks. The back of the headset base
has color-coded dots and the names of the jacks above them
that correspond to the colored labels on the cords.
Digital subscriber line (DSL)
If you subscribe to high-speed Internet service (DSL - digital
subscriber line) through your telephone line, you must install a
DSL filter between the telephone line cord and telephone wall
jack (see pages 14 and 22). The filter prevents noise and caller
ID problems caused by DSL interference. Please contact your DSL
service provider for more information about DSL filters.
For customer service or product information, visit our website at
www.telephones.att.com or call 1 [phone].
In Canada, dial 1 [phone].
Avoid placing the headset base too close to:
• Communication devices such as television sets, VCRs or other
cordless telephones.
• Excessive heat sources.
• Noise sources such as a window with traffic outside, motors,
microwave ovens, refrigerators or fluorescent lighting.
• Excessive dust sources such as a workshop or garage.
• Excessive moisture.
• Extremely low temperature.
• Mechanical vibration or shock such as on top of a washing
machine or work bench.

11
Getting started
Battery installation
The battery is permanently attached to the battery compartment
cover (known as the battery pack). Do not try to separate them
from each other. After installing the battery pack, charge it for
at least 15 minutes. You may be able to make and receive short
calls. For optimal performance, charge the headset battery for
at least three hours before use. When fully charged, the headset
battery provides approximately 12 hours of talk time or 5 days
of standby time. When the headset is not in use, recharge by
returning it to the headset base.
NOTES:
Remove any headset attachment (earbud excluded) before battery
replacement.
To order a replacement battery pack (model BT191665), visit our website at
www.telephones.att.com or call 1 [phone]. In Canada,
dial 1 [phone].
•
•
1. Insert the battery pack into the
battery compartment.
2. Press down on the battery pack
until it clicks into place.

12
Getting started
Battery charging and connecting base power
After installing the battery, charge the headset by placing it in
the magnetic charging mount as shown below. The light turns
on when the headset is charging.
IMPORTANT INFORMATION
Use only the supplied rechargeable battery pack or replacement
battery pack (model BT191665). To order, visit our website at
www.telephones.att.com or call 1 [phone].
In Canada, dial 1 [phone].
Magnetic
charging mount
Insert the headset into the
magnetic charging mount.
1. The magnet holds the top of
the headset in place.
The light turns on.
2.
Plug the small end of the headset base power adapter into
the POWER jack (green dot) at the back of the headset base.
Plug the headset base power adapter into an electrical outlet
not controlled by a wall switch.
3.

13
Getting started
Headset base and handset lifter installation
Installation options
You have three installation options:
Option 1: Connect the handset lifter to a corded phone (see
pages 14-21). This option enables you to answer calls
even if you are away from the telephone base.
Option 2: Connect the headset to a telephone wall jack (see
page 22). This option enables you to use the headset
with a single telephone line with or without a telephone.
Option 3: Connect the headset to your computer (see page 23).
This option enables you to use the headset for VoIP
(Voice over IP) calls through your computer.
Corded handset connection switch
If you connect your headset to a corded handset (page 14), set
the CORDED HANDSET CONNECTED switch to YES.
If you connect your headset to a telephone wall jack (page 22),
set the CORDED HANDSET CONNECTED switch to NO.
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•