User’s manual
TL7912
DECT 6.0 cordless headset
and handset lifter
Congratulations
on your purchase of this AT&T product.
Unify your everyday business communications with the AT&T
TL7912 DECT 6.0 Cordless Headset and Handset Lifter. Whether
you want to connect directly to your corded telephone,
telephone line or computer, you can with the TL7912 headset.
Control costs and support your mobile workforce with
connectivity to Voice over IP (VoIP) services like
Microsoft Lync
it convenient to answer and end calls right from the headset.
A magnetic charger in the cradle ensures the headset fits and
charges securely—so you’ll never run out of battery during long
calls. With up to 12 hours of hands-free talk time and a range of
up to 500 feet, you’re free to work wherever your work is.
Before using this AT&T product, please read the
Important safety information section on pages 62-64 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
1 (800) 222-3111.
Visit
www.telephones.att.com/headsets
list of AT&T phones that have been tested and found to be
compatible with the TL7912.
. It comes with the TL7100 Handset Lifter, making
www.telephones.att.com
In Canada, dial
1 (866) 288-4268.
SkypeTM and
or call
for a complete
The Skype name is a trademark of Skype.
Microsoft Lync is a registered trademark of Microsoft Corporation.
Model number: TL7912
T
Compatible with
Hearing Aid T-Coil
TIA-1083
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.
Telephones identified with this logo have reduced noise and
interference when used with most T-coil equipped hearing
aids and cochlear implants. The TIA-1083 Compliant Logo is
a trademark of the Telecommunications Industry Association.
Used under license.
© 2012-2013 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.
Quick start guide
TL7912
DECT 6.0 cordless headset
and handset lifter
Quick start guide
Headset base
User’s manual
TL7912
DECT 6.0 cordless headset
and handset lifter
User's manual
Battery with battery
compartment cover attached
Cordless headset with
earbud attached
Headset base
power adapter
Telephone line cord
Corded phone connection cable
Line splitter
Parts checklist
Three over the ear hooksFive earbuds Two over the head bands
Handset lifterlifterUSB cableBehind the neck band
CD-ROM
Auxiliary ring detectorLarge lifter padlifter pad pad Anti-slip pad
User’s manual
TL7912
DECT 6.0 cordless headset
and handset lifter
Table of contents
Getting started
Introduction ...................................... 1
Quick reference guide -
headset ........................................... 2
Headset lights ............................. 2
Headset alert tones .................. 4
Quick reference guide -
headset base ............................... 5
Headset base lights .................. 5
Quick reference guide -
handset lifter ...............................8
STATUS light ...............................10
Installation ......................................11
Colored labels ...........................11
Digital subscriber line
(DSL) ...............................................11
Battery installation .....................12
Headset base installation
and battery charging ...........13
Headset base and handset
lifter installation .......................14
Installation options .................14
Option 1: Connect the
headset to a corded
phone ............................................15
Option 2: Connect the
headset to a corded phone
and computer ............................17
Option 3: Connect the
headset to a telephone
wall jack .......................................21
Adjust the corded handset
audio ..............................................22
Attach the lifter ........................23
Adjust the switch hook
presser position .......................24
Adjust the height of the
lifter arm ......................................24
Lifter adjustments and
testing ...........................................25
Installation of large lifter
pad (optional) ............................26
Installation of anti-slip pad
(optional) .....................................26
About internal and auxiliary
ring detectors ............................27
Install the auxiliary ring
detector ........................................27
Ring detector on/off ..............28
Adjust the sensitivity
level ...............................................28
Headset attachments ................29
Earbud ...........................................29
Over the ear hook ...................30
Over the head band ...............33
Behind the neck band ...........35
Operation
Headset operation ......................38
Power on/off the
headset .........................................38
PHONE mode and PC
mode .............................................38
PHONE mode.................................39
Make a call..................................39
Answer a call .............................39
End a call .....................................40
Voice command ........................40
Headset ringer ..........................40
Caller ID announce .................41
Temporary ringer
silencing .......................................41
Call waiting .................................41
Options while on calls ..............42
Volume control .........................42
Mute ...............................................43
Switching between PHONE
mode and PC mode ...............44
Maintenance...................................61
Important safety
information .................................62
Safety information...................62
Especially about cordless
headsets ......................................63
Precautions for users
of implanted cardiac
pacemakers ................................64
Pacemaker patients ................64
FCC Part 68 and ACTA..............65
FCC Part 15 ....................................67
Limited warranty ..........................68
Technical specifications ...........71
DECT 6.0 digital
technology ..................................71
Operating range .......................71
Extended range and
clarity ............................................71
Encrypted for added
security .........................................71
Appendix
Adding and registering
headsets ......................................45
Registration options ...............45
Register a headset to your
TL7912 headset base ............46
Register a headset to
an AT&T DECT cordless
telephone base ........................47
Deregistering headsets .............49
Deregister all headsets
from your TL7912 headset
base ................................................49
Troubleshooting ...........................50
Index
Index ..................................................72
Getting started
Introduction
The TL7912 is a cordless headset and base that allows you to
have handsfree phone conversations. The package also comes
with the TL7100 handset lifter, making it convenient to answer
and end calls right from the headset. It can be used in different
ways depending on your needs. Choose from the following three
options. Connect your TL7912:
To a traditional corded telephone (pages 15-16). Connect the
•
headset base to a corded telephone and install the lifter on
your corded telephone. You can use the headset to remotely
control the lifter for answering or hanging up a call.
To both a corded phone and computer (pages 17-20).
•
Connect the headset base to a corded telephone and install
the lifter on your corded telephone. Use the USB cable to
connect the headset base and your PC. You can make and
answer VoIP calls through Skype or Microsoft Lync, or landline
calls using the AT&T Softphone Call Manager. You can also
use the voice command feature to make or answer calls after
you have installed the AT&T Softphone Call Manager.
Install the AT&T Softphone Call Manager using the
CD-ROM provided in the package.
-OR-
Visit www.telephones.att.com/downloads to download
the software. Unzip and install the file after download.
For installation and operation instructions of the software, refer
to the Installation and Operation Guide which can also be
found in the CD-ROM provided or the web site stated above.
To a telephone line only (page 21). If you do not want to
•
install the lifter on the corded handset, you can simply connect
the headset to a telephone wall jack through the line splitter
provided. Use the telephones on the same telephone line to
make or answer calls. The headset is a supplementary device
that can join the calls.
1
Getting started
Getting started
Quick reference guide - headset
(On/off button and light)
Press to make, answer or end a call
(pages 39-40).
Headset lights
light status
Red On when the headset battery is low and the headset
Blue On when a registered headset is charging in the
Red and blue Flashes slowly when the headset is not registered.
Off The battery is dead.
•
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.
•
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 registered headset
•
in idle mode is out of the headset base.
•
Flashes quickly when the headset is trying to
•
register to a headset base.
•
No battery is installed.
•
The headset is powered off.
•
2
Getting started
Quick reference guide - headset
Earpiece
VOL+/VOL-
Slide the volume switch
to the right or left to
adjust the headset
ringer volume while
in idle mode (page 40),
or the listening volume
while on a call
(page 42).
Battery with cover
attached
Remove to replace the
battery.
Microphone
The microphone
incorporates noise
canceling technology
for clearer calls.
FLASH
Press to answer an
incoming call when
you receive a call
waiting alert during a
call (page 41).
MUTE/VOICE
Press to mute the
microphone during a call
(page 43).
Press to mute the ringer in
the earpiece when there is
an incoming call (page 41).
Press to initiate the voice
command feature when in
idle mode (page 40).
3
Getting started
Quick reference guide - headset
Headset alert tones
One long beep The headset is ready to take your voice
•
command. (You have to install the AT&T
Softphone Call Manager before using the
voice command feature. For installation and
operation instructions of the software, refer
to the Installation and Operation Guide
which can be found in the CD-ROM in the
package. You may also visit
www.telephones.att.com/
downloads to download it.)
One short beep every
30 seconds
Two beeps Error alert tone.
Two low beeps Call waiting alert tone.•
Two rapid beeps
every 20 seconds
Three rising beeps A conference call has started.•
Three rapid beeps
every 20 seconds
Three rapid beeps The headset is powering on or off.•
The microphone is muted. •
•
The speaking volume has reached its highest
•
or lowest setting.
Any key is pressed while the headset is out
•
of range.
Low battery warning.•
The headset is out of range.
•
The headset is not yet registered.
•
4
Getting started
Quick reference guide - headset base
Magnetic charging mount
Place the headset here
for charging.
MUTE (light)
PHONE (mode
button and light)
Headset base lights
MUTE
(Red)
PHONE
(Blue)
PC
(Blue)
On when you are registering a headset.
•
Flashes when a call is muted.
•
Flashes when you are deregistering headset(s) from the
•
headset base.
On when PHONE mode is selected as the default mode
•
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.
Flashes slowly when a call is on hold in PHONE mode.
•
On when PC mode is selected as the default mode on
•
the idle headset base.
Flashes twice every three seconds when the headset is in
•
use in PC mode.
Flashes slowly when a call is on hold in PC mode.
•
PAIR
Use to initiate headset
registration or deregistration.
PC (mode button
and light)
5
Getting started
Quick reference guide - headset base
VOLUME /MICROPHONE
Press the volume keys on the side
of the headset base to adjust the
speaking volume when on a call
(page 42).
(USB port)
Open the port cover to plug in the
USB cable for use with PC mode
(pages 17-18).
LIFTER
This jack is only used to connect an
AT&T handset lifter (model TL7100,
purchased separately).
CORDED HANDSET CONNECTED/
YES/NO
Choose the setting based on whether
you have connected to a corded
handset (page 16, 18 or 21).
6
Getting started
Quick reference guide - headset base
CORDED PHONE CONNECTION
jack (blue dot)
This jack is only used to connect
the corded phone connection cable
(page 15 or 17).
TEL WALL JACK (red dot)
POWER jack (green dot)
Corded handset audio adjust switch
Use this switch to adjust the corded
handset audio when you have connected
the headset base to a corded telephone
(page 22).
7
Getting started
Quick reference guide - handset lifter
SENSOR ADJ knob
Adjusts the sensitivity of the ring detector (page 28).
ADJUST LIFTER knob
Adjusts the height of the lifter arm (page 24).
Lifter arm
Holds the corded telephone handset.
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
Plug this cable into the LIFTER jack on
the headset base.
RING DETECT jack
Plug in the auxiliary ring
detector (page 27).
8
Getting started
Quick reference guide - handset lifter
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 28).
Switch hook presser adjustment knob
Adjusts the position of the switch hook presser
(page 24).
Small lifter pad
Holds the earpiece of the corded telephone
handset.
STATUS light
On in red when the ring detector is off (page 10).
On in blue when the ring detector is on and
the headset is not in use (page 10).
Flashes in blue four times every three seconds
when the ring detector detects an incoming
call (page 10).
Front view
Flashes in blue slowly when the switch hook
presser is raised and you are on a call
(page 10).
Back view
Internal ring detector
Detects the telephone ringer and sends a
ring tone to the headset earpiece.
Adhesive tape
Remove the protective strips before
attaching the lifter to the telephone base.
9
Getting started
Quick reference guide - handset lifter
STATUS light
Red On when the headset is not in use and the ring detector is
Blue On when the headset is not in use and the ring detector
Off The headset base does not have power.
•
turned off.
Flashes slowly when the headset is in use and the ring
•
detector is turned off.
•
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.
•
The lifter control cable is not plugged into the LIFTER jack
•
on the headset base.
10
Getting started
Installation
You must install and
charge the battery before
using the headset.
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 page 15, 17 or 21). 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
STOP!
See pages 12-13
for easy instructions.
www.telephones.att.com or call 1 (800) 222-3111.
In Canada, dial 1 (866) 288-4268.
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. 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.
1. Insert the battery pack into the
battery compartment.
2. Press down on the battery pack
until it clicks into place.
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 (800) 222-3111.
In Canada, dial 1 (866) 288-4268.
12
Getting started
Headset base installation and battery charging
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.
Plug the small end of the headset base power adapter into
1.
the POWER jack (green dot) at the back of the headset base.
Plug the large end into an electrical outlet not controlled by a
wall switch.
The magnet holds the top
Insert the headset into the
2.
magnetic charging mount.
3.
of the headset in place.
The light turns on.
Magnetic
charging
mount
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 (800) 222-3111.
In Canada, dial 1 (866) 288-4268.
13
Getting started
Headset base and handset lifter installation
Installation options
There are three installation options as described below.
For Options 1 and 2, the handset lifter works with the cordless
headset to provide a complete communication solution for most
corded telephones. The lifter raises and lowers its switch hook
presser to answer, make and end phone calls. The ring detector
provides an incoming call indication through the cordless
headset, so you can answer calls even when you are away from
the telephone base.
Option 1: Connect the headset to a corded phone (see pages
15-16). This option allows you to use the headset to
remotely control the lifter for answering or hanging up
a call.
Option 2: Connect the headset to a corded phone and computer
(see pages 17-20). This option enables you to use the
headset for VoIP (Voice over IP) calls through your
computer, or traditional phone call through the corded
phone. You can use the voice command feature to
make or answer calls. Make sure you install the AT&T
Softphone Call Manager on your computer using
the CD-ROM provided in the package. You may also
visit www.telephones.att.com/downloads
to download and install the software. For installation
and operation instructions of the software, refer to the
Installation and Operation Guide which can also be
found in the CD-ROM provided or the web site stated
above.
Option 3:
If you do not want to install the lifter on the corded
handset, you can simply connect the headset to a
telephone wall jack through the line splitter provided
(see page 21). The headset acts as a supplementary
device that can join calls. Use the telephones connected
to the same telephone line to make or answer calls.
14
Getting started
Headset base and handset lifter installation
Option 1: Connect the headset to a corded phone
Plug one end of the corded phone connection cable into the
1.
CORDED PHONE CONNECTION jack (blue dot) at the back of
the headset base.
Plug the other end of the corded phone connection cable into
2.
the handset jack on the corded phone.
Unplug the curly handset cord from the handset jack on the
3.
corded phone and plug it into the jack on the corded phone
connection cable.
Plug the small end of the headset base power adapter
4.
to the POWER jack (green dot) on the headset base.
Telephone
wall jack
5
Telephone
line cord
A DSL filter (not
included) is required if
you have DSL
high-speed Internet
service. The DSL filter
must be plugged into a
telephone wall jack.
6
4
1
7
3
2
Corded phone
15
Getting started
Headset base and handset lifter installation
Option 1: Connect the headset to a corded phone (cont.)
Plug the large end of the headset base power adapter into a
5.
power outlet not controlled by a wall switch.
Plug the end of the lifter control cable into the LIFTER jack at
6.
the back of the headset base.
Use the attached fastener to bundle all line cords neatly.
7.
Make sure the CORDED HANDSET
8.
CONNECTED switch on the right side of the
headset base is set to YES.
Adjust the corded handset audio (see
9.
page 22) before you install the
handset lifter on the corded phone.
For instructions of installing the lifter, see
10.
pages 23-26. For information about the
internal and auxiliary ring detectors, refer to pages 27-28.
8
16
Getting started
Headset base and handset lifter installation
Option 2: Connect the headset to a corded phone and computer
Plug one end of the corded phone connection cable into the
1.
CORDED PHONE CONNECTION jack (blue dot) at the back of
the headset base.
Plug the other end of the corded phone connection cable into
2.
the handset jack on the corded phone.
Unplug the curly handset cord from the handset jack on the
3.
corded phone and plug it into the jack on the corded phone
connection cable.
6
7
8
1
4
Telephone
wall jack
A DSL filter (not included) is
required if you have DSL
high-speed Internet service.
The DSL filter must be plugged
into a telephone wall jack.
5
Telephone
line cord
17
9
3
2
Corded phone
Getting started
Headset base and handset lifter installation
Option 2: Connect the headset to a corded phone and
computer (cont.)
Plug the small end of the headset base power adapter
4.
to the POWER jack (green dot) on the headset base.
Plug the large end of the headset base power adapter into a
5.
power outlet not controlled by a wall switch.
Plug the small end of the USB cable into the USB port
6.
labeled on the right side of the headset base.
Plug the large end of the USB cable into a USB port on your
7.
computer. Wait for your computer to indicate that it has
recognized the headset.
Plug the end of the lifter control cable into the LIFTER jack at
8.
the back of the headset base.
Use the attached fastener to bundle all line cords neatly.
9.
Make sure the CORDED HANDSET
10.
CONNECTED switch on the right side of the
headset base is set to YES.
Adjust the corded handset audio (see
11.
page 22) before you install the
handset lifter on the corded phone.
10
For instructions of installing the lifter, see
12.
pages 23-26. For information about the
internal and auxiliary ring detectors, refer to pages 27-28.
Install the AT&T Softphone Call Manager using the
13.
CD-ROM provided in the package. You may also visit
www.telephones.att.com/downloads to download
and install the software. For installation and operation
instructions of the software, refer to the Installation and
Operation Guide which can also be found in the CD-ROM
provided or the web site stated above.
18
Getting started
Headset base and handset lifter installation
Option 2: Connect the headset to a corded phone and
computer (cont.)
After you have installed the AT&T Softphone Call Manager,
14.
check to make sure the audio setting is properly configured
in your Windows system. If you have installed Skype and/or
Microsoft Lync and want to use them with your headset,
make sure the audio settings are configured correctly in the
programs as well.
a) Audio settings in Microsoft® Windows® system:
For Windows XP® users:
Click Start menu and choose Control Panel.
i.
Click Sounds, Speech, and Audio Devices and then click
ii.
Sounds and Audio Devices.
Click the Audio tab.
iii.
Make sure AT&T DECT Headset is selected under the
iv.
Sound playback and Sound recording settings.
For Windows 7 users:
Click Start menu and choose Control Panel.
i.
Click Hardware and Sound and then click Manage
ii.
audio devices under the Sound menu.
Click the Playback tab and make sure AT&T DECT
iii.
Headset is set as the default speaker.
Click the Recording tab and make sure AT&T DECT
iv.
Headset is set as the default microphone.
Windows® and Windows XP® are registered trademarks of Microsoft Corporation.
19
Getting started
Headset base and handset lifter installation
Option 2: Connect the headset to a corded phone and
computer (cont.)
b) Audio settings in Skype:
Launch the Skype program.
i.
Click on Tools, then Options.
ii.
Click on Audio settings.
iii.
Make sure AT&T DECT Headset is selected under the
iv.
speakers and microphone settings.
c) Audio settings in Microsoft Lync:
Launch the Microsoft Lync program.
i.
Click on Options, then Audio Device.
ii.
Make sure AT&T DECT Headset is selected under the
iii.
Audio device setting.
IMPORTANT
Periodically check for software updates. Go to the ABOUT tab under the
Settings panel in the AT&T Softphone Call Manager, then click Check
Update. For more details, refer to the Software updates section in the
Installation and Operation Guide, available in the CD-ROM which comes
with the package.
20
Getting started
Headset base and handset lifter installation
Option 3: Connect the headset to a telephone wall jack
Make sure the CORDED HANDSET
1.
CONNECTED switch on the right side of the
headset base is set to NO.
Connect the line cords as shown below.
2.
Use the included line splitter to connect the
headset base and your telephone to the
same telephone wall jack.
Plug one end of the
•
telephone line cord into
the TEL WALL JACK
(red dot) at the back of
the headset base.
Use the attached
•
fastener to bundle
all line cords neatly.
Connect another
•
telephone line
cord between the
telephone and the
line splitter.
Corded or
cordless phone
Telephone line cord
Plug the other end of the
•
telephone line cord into
the line splitter.
Plug the line splitter into
•
the telephone wall jack
(or a DSL filter if you
subscribe to DSL Internet
service).
Line splitter
A DSL filter (not included) is
required if you have DSL
high-speed Internet service.
The DSL filter must be plugged
into a telephone wall jack.
NOTE: The headset base and headset do not have external ringers. When
you receive calls, the headset earpiece rings. If you have telephones
connected to the same telephone line as the headset base, you can rely on
the ringers of those telephones to alert you to incoming calls.
21
Getting started
Headset base and handset lifter installation
Adjust the corded handset audio
After you have connected the headset base
to your corded phone, you may need to
adjust the corded handset audio switch at
the bottom of the headset base for optimal
sound quality.
To adjust the corded handset audio:
Lift the corded handset and then
•
press on the headset to check for a
dial tone. If there is no dial tone or the
dial tone is unclear, slide the corded
handset audio switch at the bottom of
the headset base from A to F until the
dial tone is clear.
22
Getting started
Headset base and handset lifter installation
Attach the lifter
1. To choose where to install the lifter
on your telephone, look at the space
underneath the corded handset. If there
is a speaker, the lifter should be centered
over the speaker. If there is no speaker, the
lifter should be centered within the space.
Make sure the lifter arm is raised above
the switch hook of the telephone base.
2. Peel off the protective strips from the
adhesive tape at the bottom of the lifter.
3. Carefully place the lifter in the desired
position and press down.
4. Plug the lifter control cable into the
LIFTER jack on the headset base.
Adhesive tape
23
Getting started
Headset base and handset lifter installation
Adjust the switch hook presser position
Turn the knob to move the switch hook presser until it is lined
up with your telephone switch hook.
Adjust the height of the lifter arm
Turn the ADJUST LIFTER knob to change the height of the lifter
arm. When in the raised position, the arm should release the
switch hook so you can hear a dial tone. When lowered, the arm
should hold the switch hook down so you cannot hear a dial tone.
24
Getting started
Headset base and handset lifter installation
Lifter adjustments and testing
1. Make sure that the CORDED HANDSET CONNECTED
switch on the headset base is set to YES.
2. Turn the switch hook presser adjustment
knob until the switch hook presser is just
above the switch hook (see page 24).
3. Lower the lifter arm until the switch hook
presser holds the switch hook down.
4. Place the corded handset on the lifter.
5. Press on the headset. The switch hook
presser should rise and release the switch
hook on your telephone base. Make sure
you hear a dial tone through your headset
earpiece.
6. If the switch hook is not fully released, turn
the ADJUST LIFTER knob (see page 24)
while the corded handset is on the lifter.
When the switch hook is fully released, you
will hear a dial tone from the headset.
It may take some adjustments and testing to
find the right position for the lifter. For the
lifter to work properly, the switch hook must
release completely when you press and
turn the headset on. The switch hook must
also be held down completely when you
press and turn the headset off.
25
Getting started
Headset base and handset lifter installation
Installation of large lifter pad (optional)
If the small lifter pad cannot hold the corded handset steadily, you
can attach a large lifter pad (provided) to enlarge the contact area.
1. Hold the large lifter pad in front of the small lifter pad as
shown below.
2. Insert the large lifter pad into the two front gaps of the small
lifter pad.
Installation of anti-slip pad (optional)
The anti-slip pad (provided) helps prevent your corded handset
from slipping from the lifter.
1. Position the anti-slip pad above the small lifter pad.
2. Peel off the protective strip from the anti-slip pad.
3. Carefully return the anti-slip pad to the predetermined position
and replace the corded handset on the lifter.
Adhesive tape
Protective strip
26
Getting started
About internal and auxiliary ring detectors
The internal or auxiliary ring detector detects the telephone
ringer and sends a ring tone to the headset earpiece.
If you installed the lifter over the top of the corded phone
speaker, the internal ring detector will recognize when the
phone rings. However, if your corded phone speaker is located
elsewhere on the phone, stick the auxiliary ring detector to the
speaker as shown below.
Install the auxiliary ring detector
1. Insert the auxiliary ring detector plug into the RING DETECT
jack on the lifter.
2. Remove the protective strip from the adhesive tape on the
auxiliary ring detector.
3. Stick the auxiliary ring detector to the center of the corded
phone speaker.
RING DETECT jack
Auxiliary ring detector
Auxiliary ring
detector plug
27
Speaker
Adhesive tape
RING DETECT jack
Getting started
About internal and auxiliary ring detectors
Ring detector on/off
When the ring detector detects an incoming call, it sends a ring
tone to the headset earpiece.
Press the RING ON/OFF button on the
•
lifter to turn the ring detector on or
off. The STATUS light is blue when the
ring detector is turned on. The STATUS
light is red when the ring detector is
turned off.
When the ring detector is turned off,
•
it does not send a ring tone to the
headset. The light on the headset
does not flash when there is an
incoming call.
NOTE: When you are using the speakerphone of your telephone, the ring
detector may send a ring tone to the headset. If you do not want the
headset to ring, press the RING ON/OFF button to turn the ring detector
off. After the call, you can press the RING ON/OFF button again to turn the
ring detector back on.
Adjust the sensitivity level
The default setting of the ring detector works with most corded
telephones. However, the ring detector might need some
adjustments if the ring tone level of your corded phone is too
soft.
To adjust the ring detector sensitivity while the telephone
is ringing:
Turn the SENSOR ADJ knob clockwise to
•
increase the sensitivity.
Turn the SENSOR ADJ knob
•
counterclockwise to decrease
the sensitivity.
When the ring detector detects the telephone ringer correctly:
The STATUS light on the lifter flashes quickly when the
•
telephone rings.
The detector sends the ring tone to the headset earpiece.
•
28
Getting started
Headset attachments
Earbud
There are a total of six earbuds provided. One of them has been
attached to the headset. They come in three sizes of which there
are two types: one normal and one providing a deeper fit. Follow
the steps below to change the earbud.
To remove the earbud from the headset earpiece:
Hold both sides of the earbud. Twist and pull the earbud until it
separates from the earpiece.
To attach the earbud to the headset earpiece:
Choose an appropriate earbud.
1.
Position the earbud on the earpiece as shown below.
2.
Press the earbud down on the earpiece until it clicks into
3.
place. Move the earbud around so that the protruding bump
on the earbud is pointing towards your mouth when placed on
your ear.
29
Protruding
bump
Getting started
Headset attachments
Over the ear hook
There are three ear hooks provided. Choose the size that best fits
your need to attach to the headset. Follow the steps below to
attach an ear hook to the headset.
To position the headset to wear on the left or right ear:
To wear on the left ear:•
Make sure the ear hook loop
1.
is positioned, as shown in
Figure 1 on the right.
Attach the ear hook to the
2.
headset, as instructed on the
next page.
To wear on the right ear:•
Make sure the ear hook loop
1.
is positioned, as shown in
Figure 2 on the right.
Attach the ear hook to the
2.
headset, as instructed on the
next page.
Ear hook loop
Figure 1
Ear hook loop
30
Figure 2
Getting started
Headset attachments
To attach the ear hook to the headset:
Make sure there is no headset attachment, except the earbud,
1.
connected to the headset.
Insert the earpiece into the ear hook loop, as shown in Figure 3.
2.
Press the edge of the ear hook loop towards the earpiece until
3.
it clicks into place, as shown in Figure 4.
4. Hook the headset onto the desired ear. Adjust the angle of the
headset until the microphone is pointing towards your mouth,
as shown in Figure 5.
Figure 3 Figure 4
Figure 5
31
Getting started
Headset attachments
To remove the ear hook from the headset:
Hold the headset with one hand. Twist and pull the ear hook with
the other hand until it separates from the earpiece.
32
Getting started
Headset attachments
Over the head band
There are two over the head bands provided. Choose the one
that best fits your need to attach to the headset. Follow the steps
below to attach an over the head band to the headset.
To attach the head band to the headset:
Make sure there is no headset attachment, except the earbud,
1.
connected to the headset.
Insert the earpiece into the loop of the ear pad, as shown in
2.
Figure 6.
Push the earpiece into the ear pad until it clicks into place, as
3.
shown in Figure 7.
Adjust the head band to fit your head. Adjust and rotate the
4.
angle of the headset until the microphone is pointing towards
your mouth, as shown in Figure 8.
Figure 6
Figure 7
Figure 8
NOTES:
To wear on the other ear, rotate the headset within the loop of the ear pad.
•
Firmly grip the ear pad with one hand whenever adjusting the headset
•
microphone up or down.
33
Getting started
Headset attachments
To remove the head band from the headset:
Hold the headset with one hand and the ear pad with the
other hand. Twist and pull the headset until it separates from the
ear pad.
34
Getting started
Headset attachments
Behind the neck band
By default, the ear pad on the neck band is positioned to be
worn on the right ear.
To attach the headset to the neck band:
Make sure there is no headset attachment, except the earbud,
1.
connected to the headset.
Insert the earpiece into the loop of the ear pad, as shown in
2.
Figure 9.
Gently press the earpiece inward until it clicks into place, as
3.
shown in Figure 10.
Place the neck band around your neck and over your ears.
4.
Adjust and rotate the angle of the headset until the microphone is
5.
pointing towards your mouth, as shown in Figure 11.
Figure 11
35
Figure 10Figure 9
Getting started
Headset attachments
To wear the headset on your left ear:
Remove the ear pad and supporting pad from the neck band
1.
by carefully pulling them up through the stems at the end of
the neck band, as shown in Figure 12.
Supporting pad
Ear pad
Figure 12
Snap the socket of the ear pad into the stem at the left end of the
2.
neck band. Snap the socket of the supporting pad into the stem at
right end of the neck band, as shown in Figure 13.
Figure 13
Follow Steps 1-5 in To attach the headset to the neck band on
3.
page 35.
36
Getting started
Headset attachments
To remove the neck band from the headset:
Hold the headset with one hand and the ear pad with the
other hand. Twist and pull the headset until it separates from the
ear pad.
37
Operation
Operation
Headset operation
Power on/off the headset
Power on the headset before use.
To power on the headset:
Place the headset in the headset base.
•
-OR-
Press and hold for two seconds.
•
The light flashes blue three times and you hear three beeps
when it is being powered on.
Power off the headset if it will not be used for a long time.
To power off the headset:
Press and hold for four seconds.
•
The light flashes red three times and you hear three beeps
when it is being powered off.
Prolonged exposure to high volume levels using the headset may damage
your hearing.
PHONE mode and PC mode
Before using the headset, you may change the default mode of
your headset. When the headset is not in use and you press ,
your headset automatically switches to the default mode you
selected. When the headset is not in use, you can choose
between PHONE mode and PC mode.
To choose PHONE mode:
Press the PHONE button on the headset base. The PHONE
•
light turns on.
To choose PC mode:
Press the PC button on the headset base. The PC light turns on.
•
38
Operation
PHONE mode
Make a call
To make calls on your home or office telephone line, press
PHONE on the headset base for PHONE mode.
When the headset base is connected to the corded handset of
your telephone with the handset lifter installed:
1.
Press on the headset. The switch hook presser rises and releases
the switch hook. You hear a dial tone in the headset earpiece.
2. Dial the telephone number using the dialing keys.
When the headset base is connected to a telephone wall jack:
Follow the instructions in your telephone user’s manual for
1.
making calls.
Press on the headset at any time to join the call.
2.
After you join the call, you can hang up the telephone and
3.
continue the call on the headset.
NOTES:
You cannot switch a call from the headset to the corded handset.
•
If you plug the headset into a telephone line without a telephone connected,
•
you are unable to make calls.
Answer a call
When the headset base is connected to the corded handset of
your telephone with the handset lifter installed:
Press on the headset to answer an incoming call. The switch
•
hook presser rises and releases the switch hook. You hear the
caller through the headset earpiece.
When the headset base is connected to a telephone wall jack:
Press on the headset.
•
39
Operation
PHONE mode
End a call
When the headset base is connected to the corded handset of
your telephone with the handset lifter installed:
Press on the headset to end a call. The switch hook presser
•
pushes down the switch hook and ends the call.
When the headset base is connected to a telephone wall jack:
Press on the headset or place the headset in the headset base.
•
Voice command
The voice command feature enables you to make or answer
calls using certain voice commands. You have to install the
AT&T Softphone Call Manager on your computer to use the
voice command function. The software is available in the
CD-ROM which comes with the package. You may also visit
www.telephones.att.com/downloads to download and
install the software.
For detailed instructions of the voice command feature, refer to
the Installation and Operation Guide, also available in the
CD-ROM which comes with the package or the web site stated
above.
Headset ringer
The headset base and headset do not have external ringers.
When you receive calls, the headset earpiece rings. If you have
telephones connected to the same telephone line as the headset
base, you can rely on the ringers of those telephones to alert
you to incoming calls.
To change the volume of the earpiece ringer:
Slide the volume switch at the top of the headset towards
•
VOL+ or VOL- when the headset is not in use.
To turn off the earpiece ringer:
Slide the volume switch at the top of the headset towards
•
VOL- until you hear two beeps when the headset is not in use.
40
Operation
PHONE mode
Caller ID announce
The Caller ID Announce feature lets you know who is calling
without having to look at the display. You have to install the
AT&T Softphone Call Manager on your computer to use the
Caller ID announce function. The software is available in the
CD-ROM which comes with the package. You may also visit
www.telephones.att.com/downloads to download and
install the software.
For detailed instructions of the caller ID announce feature, refer to
the Installation and Operation Guide, also available in the
CD-ROM which comes with the package or the web site stated
above.
Temporary ringer silencing
Press MUTE
earpiece. This silences the ringer without disconnecting the call.
The next incoming call rings normally at the preset volume.
NOTE: If you have more than one headset registered to the headset base,
both headset earpieces ring when there is an incoming call. Pressing
MUTE/VOICE on one headset only silences the ringer of that headset.
/VOICE
to temporarily silence the ringer in the headset
Call waiting
If you subscribe to call waiting service offered
by your telephone service provider, you will
hear a call waiting alert tone if someone calls
you while you are in the middle of a call.
•
Press down the FLASH switch at the top of
the headset to put your current call on hold
and answer the new call.
•
Press the FLASH switch again at any time to switch back and
forth between calls.
41
Operation
Options while on calls
Volume control
To adjust the listening volume:
While on a call, slide the volume switch at the top of the
•
headset towards VOL+ or VOL- to adjust the listening volume.
To adjust the speaking volume:
While on a call, press VOLUME /MICROPHONE on the
•
right side of the headset base to adjust the speaking volume.
NOTES:
Listening volume settings are independent for each headset, but the speaking
•
volume is shared by all registered headsets.
When the listening volume reaches the minimum or maximum setting, you hear
•
two beeps.
When the speaking volume reaches the minimum or maximum setting, you hear
•
three beeps.
42
Operation
Options while on calls
Mute
The mute function turns off the headset microphone. You can
hear the caller, but the caller cannot hear you.
To mute a call:
• Press MUTE/VOICE on the headset to turn off the
headset microphone. The voice prompt "Mute on"
plays. The MUTE light on the headset base flashes
and a short beep plays every 30 seconds.
To take a call off mute:
• Press MUTE/VOICE on the headset to resume the
two-way conversation. You hear the voice prompt
"Mute off".
43
Operation
Options while on calls
Switching between PHONE mode and PC mode
You can switch back and forth between PHONE mode and PC
mode while on a call by pressing the corresponding mode button
on the headset base. Once selected, the PHONE mode light or
the PC mode light flashes twice every three seconds to indicate
that line is on hold.
When you have two registered headsets in use at the same time,
you can still change the mode by pressing the corresponding
mode button on the headset base.
While on a call:
Press the PHONE button on the headset base when in PC
•
mode. The PC call is put on hold.
Press the PC button on the headset base when in PHONE
•
mode. The PHONE call is put on hold.
Press on the headset to end the call you are on and press
again to connect to the call on hold.
NOTE: There is a ring back tone on the headset for one minute when a
PHONE call is put on hold for 14 minutes. At 15 minutes on hold, the call
will be automatically disconnected.
44
Appendix
Appendix
Adding and registering headsets
Registration options
The TL7912 headset comes pre-registered to the headset base.
There are two registration options as described below.
Option 1: If you have previously deregistered your TL7912
headset from the headset base and want to register
it back to the same base or another TL7912 headset
base, see page 46.
Option 2: You can deregister your TL7912 headset (see page
49) and then register it to an AT&T DECT 6.0 cordless
telephone (see pages 47-48). You can register a
maximum of two headsets (TL7912) to a cordless
telephone. The telephone base recognizes and counts
a headset the same as a handset. When you register
the headset to an AT&T DECT 6.0 cordless telephone,
the headset base acts only as a charger for the
headset. The CORDED HANDSET CONNECTED switch,
VOLUME and mode controls on the headset base
become inactive. You can place the headset base
anywhere you have an available power outlet. Do not
plug in the telephone line cord; you only need to plug
the headset base into a power outlet.
Refer to your telephone user’s manual for the maximum
number of handsets/headsets that you can register to
the telephone base. If you have the maximum number
of handsets/headsets registered, you need to follow
the deregistration information in your user’s manual.
Visit www.telephones.att.com/headsets for a
complete list of AT&T phones that have been tested
and found to be compatible with the TL7912.
You can only register the headset to one product at a time, so
the headset must be deregistered before it can be registered to
a headset base or a cordless telephone (see page 49).
45
Appendix
Adding and registering headsets
Register a headset to your TL7912 headset base
Make sure the battery is properly installed in
1.
the headset (see page 12). The light flashes
slowly in red and blue to indicate the headset
is not registered.
Place the headset in the headset base and
2.
allow it to charge for at least one hour before
beginning registration.
Remove the headset from the headset base.
3.
Press and hold the PAIR button (about four
4.
seconds) until the MUTE light on the headset
base turns on and then release the button.
Return the headset to the headset base
5.
for registration. The light flashes quickly
in red and blue.
It takes about 60 seconds to complete the
registration process. The light turns red when
the headset is registered but not fully charged, or
turns blue when it is registered and fully charged.
If the registration fails, you hear the voice
prompt "Not registered" when you press the
button on the headset, and the light on the
headset flashes slowly in red and blue.
To reset the headset, remove it from the headset
base and try the registration process again.
NOTE: You cannot register a headset if another system headset is in use.
46
Appendix
Adding and registering headsets
Register a headset to an AT&T DECT cordless telephone base
You must deregister the headset from the
1.
headset base first (see page 49).
Make sure the battery is properly installed
2.
in the headset (see page 12). The light on
the headset flashes slowly in red and blue to
indicate the headset is not registered.
Place the headset in the headset base and
3.
allow it to charge for at least one hour before
beginning registration.
Remove the headset from the headset base.
4.
On the telephone base of the cordless phone,
5.
press and hold /HANDSET LOCATOR until the
red IN USE light turns on (about four seconds)
and then release the button.
If your telephone base has no /HANDSET
LOCATOR button:
Press and hold the HOLD button until the screen
displays Registering... Please wait, then release the button.
-OR-
Press and hold the LOCATOR button until the screen
displays Registering handset..., then release the button.
Place the headset back to its base. The light flashes quickly
6.
in red and blue.
47
Appendix
Adding and registering headsets
Register a headset to an AT&T DECT cordless telephone base
(cont.)
It takes about 60 seconds to complete the registration process.
The light turns red when the headset is registered but not fully
charged, or turns blue when it is registered and fully charged.
To verify the registration, press the button on the headset and
check for a dial tone. If the registration fails, you hear the voice
prompt "Not registered" and the light on the headset flashes
slowly in red and blue.
To reset the headset, remove it from the headset base and try
the registration process again.
NOTES:
If the registration fails, the light on the headset flashes slowly in red and
•
blue. Reset the headset and try again. Remove the headset from the headset
base and press , then place the headset back into the headset base. Try the
registration process again.
For users of Synapse , SynJ , MS2085 Console, or MS2015 Deskset, refer
•
to the user’s manual of your respective model for registration instructions.
Synapse and SynJ are trademarks of Advanced American Telephones.
48
Appendix
Deregistering headsets
You may need to deregister your headsets if:
You wish to register your headset to an AT&T DECT 6.0 cordless
telephone or a different headset base.
-OR-
You have two registered headsets and need to replace one of them.
You must first deregister both headsets, and then register each
headset you wish to use again, one at a time.
Please read carefully through all the instructions on this page
before beginning the deregistration process.
Deregister all headsets from your TL7912 headset base
Press and hold the PAIR button on the headset
1.
base (at least 10 seconds) until the MUTE light
on the headset base turns on and starts to
flash, then release the PAIR button.
Immediately press and release the PAIR
2.
button again. You must press the PAIR button
while the MUTE light is still flashing. (The light
flashes for about seven seconds. If the light stops flashing,
start again with Step 1 above.)
It takes about 10 seconds to complete the deregistration
process. The light flashes slowly in red and blue when the
deregistration process is successful.
3. To register the headset(s) to the headset base again, follow the
registration instructions on page 46.
NOTES:
You cannot deregister the headset(s) if any system headset is in use.
•
Even if the battery is depleted, you can still deregister the headset by
•
following the steps above.
To deregister all headsets from an AT&T DECT cordless telephone base, see
•
the user’s manual of your cordless telephone system, or visit our website at
www.telephones.att.com/manuals.
49
Appendix
Appendix
Troubleshooting
If you have difficulty with your telephone, please try the
suggestions below. For customer service, visit our website at
www.telephones.att.com or call
1 (800) 222–3111. In Canada, dial 1 (866) 288-4268.
My headset doesn’t work at all.
• Make sure the power cord is securely plugged in.
• Make sure that the battery is securely installed in the
cordless headset.
• Make sure the telephone line cord is securely and firmly
plugged into the headset base and the telephone wall jack.
• Charge the battery in the cordless headset for at least three
hours. For optimum daily performance, return the cordless
headset to its base when not in use.
• Reset the headset. Power off the headset and then power it on
(page 38). Allow up to one minute for the cordless headset and
headset base to reset.
• Reset the headset base. Unplug the unit’s electrical power. Wait
for approximately 15 seconds, then plug it back in. Allow up to
one minute for the cordless headset and headset base to reset.
Other electronic products such as HAM radios and other DECT
•
phones can cause interference with your cordless headset. Try
installing your headset base as far away as possible from these
types of electronic devices.
• You may need to purchase a new battery. Refer to the Battery
installation section on page 12 of this user’s manual.
The other party cannot hear my voice during a call.
Adjust the speaking volume during a call (page 42).
•
50
Appendix
Troubleshooting
There is no dial tone.
• Try all the suggestions above.
• Move the cordless headset closer to the headset base. You
might have moved out of range.
Make sure that the CORDED HANDSET CONNECTED switch is
•
set properly (page 16, 18 or 21).
• Your telephone line cord may be defective. Install a new
telephone line cord.
Another phone on the same phone line may be in use.
•
• If the previous suggestions do not work, disconnect the
headset base from the telephone jack and connect another
phone to that jack. If there is no dial tone on that phone
either, the problem is in your wiring or local service. Contact
your telephone service provider.
The battery does not charge.
• Make sure that the battery is securely installed in the
cordless headset.
• If the cordless headset is in its headset base but the light
on the headset does not turn on, refer to The light on the
headset is off while charging in this Troubleshooting guide.
• Charge the battery in the cordless headset for at least three
hours. For optimum daily performance, return the cordless
headset to the headset base when not in use.
• You may need a new battery. Refer to the Battery installation
section on page 12.
• Your headset might be defective. Refer to the Limited
warranty section on pages 68-70 for further instructions.
51
Appendix
Troubleshooting
I cannot dial out.
• Try all the suggestions above.
• You must use a telephone on the same line to dial out. Once
you have dialed the number, you can press to join the call
(page 39).
• If other phones in your home or office are having the same
problem, the problem is in your wiring or local service. Contact
your telephone service provider (charges may apply).
My cordless headset isn’t performing normally.
• Make sure the power cord is securely plugged into the headset
base. Plug the unit into a different, working electrical outlet
not controlled by a wall switch.
• Move the cordless headset closer to the headset base. You
might have moved out of range.
• Reset the headset. Power off the headset and then power it
on (page 38). Allow up to one minute for the cordless headset
and headset base to reset.
• Reset the headset base. Unplug the unit’s electrical power.
Wait for 15 seconds, then plug it back in. Allow up to one
minute for the cordless headset and headset base to reset.
• Other electronic products such as HAM radios and other DECT
phones can cause interference with your cordless headset.
Try installing your headset as far away as possible from these
types of electronic devices.
52
Appendix
Troubleshooting
I get noise, static, or a weak signal even when I’m near the
headset base.
•
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 the telephone
wall jack. The filter prevents noise and caller ID problems
caused by DSL interference. Contact your DSL service provider
for more information about DSL filters.
• You may be able to improve the performance of your cordless
headset by installing the headset base at least one foot from
any cordless telephone system. If separating them by one foot
does not help, try moving the headset farther away.
• Other electronic products such as HAM radios and other DECT
phones can cause interference with your cordless headset.
Try installing your headset as far away as possible from these
types of electronic devices.
• Do not install this headset near a microwave oven or in
the same electrical outlet. You may experience decreased
performance while the microwave oven is operating.
• If your headset is located near a modem, move your headset
and modem further apart from each other.
• Relocate your headset base to a higher location. You may
experience better reception by elevating the headset base.
• If other phones in your home or office are having the same
problem, the problem is in your wiring or local service. Contact
your telephone service provider (charges may apply).
53
Appendix
Troubleshooting
I cannot hear a ring tone from the headset when there is an
incoming call.
• The headset does not have an external ringer. You can only
hear the ring tone when you are wearing the earpiece.
If you have pressed MUTE/VOICE on the headset when it is
•
ringing, it mutes the ring tone of the headset. The ring tone
resumes on the next call.
• You may have too many extension phones on your telephone
line to allow all of them to ring simultaneously. Try unplugging
some of the other phones.
• The layout of your home or office might be limiting the
operating range. Try moving the headset base to another
location, preferably to a higher location.
• Other electronic products such as HAM radios and other DECT
phones can cause interference with your cordless headset. Try
installing your headset base as far away as possible from these
types of electronic devices.
• Install the battery again, and then place the cordless headset
in the headset base. Wait for the cordless headset to
reestablish its connection with the headset base. Allow up to
one minute for this to take place.
• Your telephone line cord may be defective. Install a new
telephone line cord.
• If other phones in your home or office are having the same
problem, the problem is in your wiring or local service. Contact
your telephone service provider (charges may apply).
• Test a working phone at the phone jack. If another phone has
the same problem, there may be a problem with the phone
jack, wiring or service. Contact your telephone service provider
(charges may apply).
54
Appendix
Troubleshooting
I hear other calls while using my headset.
• Plug a different telephone into the telephone jack that you
are currently using. If you still hear other calls, the problem
is probably in your building's wiring or local service. Call your
telephone service provider.
I cannot hear any audio using my headset in PC mode.
• Make sure the two ends of the USB cable are securely plugged
into the computer and headset base USB ports.
• Make sure PC mode is selected and the PC light is on.
• Make sure you have pressed on your headset to receive the
audio from your computer.
• Make sure you are using a software program that supports
VoIP calling (such as Skype or Microsoft Lync).
• Make sure the headset listening volume is turned on and set to
an audible level in your computer audio settings and your VoIP
calling software.
Make sure the audio settings in your VoIP calling software are
•
set to use your "AT&T DECT Headset".
The person on the other end cannot hear me in PC mode.
• Make sure the two ends of the USB cable are securely plugged
into the computer and headset base USB ports.
• Make sure PC mode is selected and the PC light is on.
• Make sure you have pressed on your headset to receive the
audio from your computer.
• Make sure you are using a software program that supports
VoIP calling (such as Skype or Microsoft Lync).
• Make sure the headset microphone volume is turned on and
set to an audible level in your computer audio settings and in
your VoIP calling software.
• Make sure the audio settings in your VoIP calling software are
set to use your "AT&T DECT Headset".
55
Appendix
Troubleshooting
I want to use my headset with a different headset base.
• You need to deregister the headset from the current headset
base (page 49), and then register it to the new headset base
(page 46).
I cannot answer an incoming call in PC mode.
• Your headset cannot directly answer a call to your computer.
You must answer all incoming calls on your computer through
your VoIP program.
• Make sure PC mode is selected on the headset base and the
PC light is on.
• Make sure you have pressed on your headset to receive the
audio from your computer.
• Make sure the headset listening volume is turned on and set to
an audible level in your computer audio settings and your VoIP
calling software.
My calls cut in and out while I’m using my cordless headset.
•
Other electronic products such as HAM radios and other DECT
phones can cause interference with your cordless headset. Try
installing your headset base as far away as possible from these
types of electronic devices.
• Do not install the headset near a microwave oven or on
the same electrical outlet. You may experience decreased
performance while the microwave oven is operating.
• If your headset is located near a modem, move your headset
and modem further apart from each other.
• Relocate your headset base to a higher location. The headset
will have better reception when not installed in a low area.
• If other phones in your home or office are having the same
problem, the problem is in your wiring or local service. Contact
your telephone service provider (charges may apply).
56
Appendix
Troubleshooting
The light on the headset is off while charging.
• Make sure the power and line cords are plugged in correctly
and securely.
Make sure that the battery is securely installed in the
•
cordless headset.
Make sure the headset is sitting properly in the base to charge.
•
• Unplug the unit’s electrical power. Wait for 15 seconds,
then plug it back in. Allow up to one minute for the cordless
headset and headset base to reset.
Clean the cordless headset and headset base charging
•
contacts each month using a pencil eraser or dry cloth.
• Your headset or headset base might be defective. Refer
to the Limited warranty section on pages 68-70 for
further instructions.
The switch hook presser of the handset lifter doesn’t rise at all.
• Make sure the CORDED HANDSET CONNECTED switch on the
headset base is set to YES.
• Make sure the lifter control cable is securely plugged into the
LIFTER jack on the headset base.
Make sure all cords and the telephone line cord are securely
•
connected to the proper sockets.
• Make sure the headset base has power.
Make sure your headset is charged and registered to the
•
headset base.
57
Appendix
Troubleshooting
When I press on the headset, the handset lifter rises, but
the call is not connected or I do not hear a dial tone.
• Try all the suggestions above.
• When using the handset lifter, make sure the CORDED
HANDSET CONNECTED switch on the headset base is set to
YES and the telephone line cord is connected to the telephone
line jack on the back of the corded phone.
• The handset lifter may not rise high enough to release the
switch hook. Try to adjust the height of the lifter arm by
turning the ADJUST LIFTER knob until it reaches the desired
angle. Adjust the switch hook presser by turning the switch
hook presser adjustment knob so that the switch hook is
released when the lifter arm rises.
• If you cannot hear a dial tone when the headset is on, you
should adjust the quality of the corded handset audio first.
During a call, slide the corded handset audio adjust switch at
the bottom of the headset base from A to F until you obtain
good sound quality.
• If the previous suggestions don’t work, disconnect the
telephone base from the telephone jack and connect a
different telephone. If there is no dial tone on that telephone
either, the problem is in your wiring or local service. Contact
your telephone service provider.
• Your line cord might be defective. Install a new line cord.
58
Appendix
Troubleshooting
My corded phone is ringing, but my headset is not ringing.
• Make sure the CORDED HANDSET CONNECTED switch on the
headset base is set to YES.
• Make sure that the RING ON/OFF button on the lifter is turned
on. If the RING ON/OFF button is turned off, the headset does
not ring.
•
If the speaker of your corded phone is not located under the lifter,
install the auxiliary ring detector. See page 27 for instructions.
• It may be necessary to adjust the sensitivity of the ring
detector. See page 28 for instructions.
• If an auxiliary ring detector is used, make sure its cord is
completely plugged into the handset lifter.
• Make sure all cords and the telephone line cord are plugged
into the appropriate outlets.
• Make sure your headset is charged.
I cannot dial out on the headset when the CORDED HANDSET
CONNECTED switch is set to YES.
• Try all the suggestions above.
• Make sure you have a dial tone before dialing.dialing.. It is normal for
a telephone base to take a second or two before producing a
dial tone. Wait an extra second before dialing.dialing..
The other party cannot hear my voice during a call.
• Make sure your headset microphone is not muted.
During a call, slide the corded handset audio adjust switch at
•
the bottom of the headset base from A to F until you obtain
good sound quality.
59
Appendix
Troubleshooting
Nothing happens when I move the corded handset audio
adjust switch.
• When the handset lifter is used, make sure the CORDED
HANDSET CONNECTED switch on the headset base is set
to YES. Slide the corded handset audio adjust switch at the
bottom of the headset base from A to F until you obtain good
sound quality.
My headset is ringing even when there is no incoming call.
The sensitivity level of your ring detector may be too high. See
•
page 28 to adjust the sensitivity level.
The ring detector may detect a sound from the environment
•
and send a ring tone to the headset. See page 28 to turn off
the ring detector.
When you are using the speakerphone of your telephone, the
•
ring detector may send a ring tone to the headset. If you do
not want the headset to ring, press the RING ON/OFF button
to turn the ring detector off. After the call, you can press the
RING ON/OFF button again to turn the ring detector back on.
Common cure for electronic equipment.
If the unit does not seem to be responding normally, try putting
the cordless headset in its base. If it does not respond, do the
following (in the order listed):
• Disconnect the power to the headset base.
• Remove the cordless headset battery.
• Wait a few minutes.
• Connect the power to the headset base.
• Install the battery again, and then place the cordless headset
into the headset base.
• Wait for the cordless headset to reestablish its connection
with the headset base. Allow up to one minute for this to
take place.
60
Appendix
Maintenance
Taking care of your headset
Your cordless headset contains sophisticated electronic parts, so it must be
•
treated with care.
Avoid rough treatment.
•
Place the headset down gently. Save the original packing materials to protect
•
your headset if you ever need to ship it.
Avoid water
Your headset can be damaged if it gets wet. Do not use the headset outdoors
•
in the rain, or handle it with wet hands. Do not install the headset base near a
sink, bathtub or shower.
Electrical storms
Electrical storms can sometimes cause power surges harmful to electronic
•
equipment. For your own safety, take caution when using electrical appliances
during storms.
Cleaning your headset
Your headset has a durable plastic casing that should retain its luster for many
•
years. Clean it only with a soft cloth slightly dampened with water or a mild soap.
Do not use excess water or cleaning solvents of any kind.
•
Remember that electrical appliances can cause serious injury if used when
you are wet or standing in water. If the headset base should fall into water,
DO NOT RETRIEVE IT UNTIL YOU UNPLUG THE POWER CORD AND TELEPHONE
LINE CORD FROM THE WALL, then pull the unit out by the unplugged cords.
61
Appendix
Important safety information
This symbol is to alert you to important operating or servicing instructions
that may appear in this user’s manual. Always follow basic safety
precautions when using this product to reduce the risk of injury, fire, or
electric shock.
Safety information
Read and understand all instructions in the user’s manual. Observe all
•
markings on the product.
Avoid using a headset during a thunderstorm. There may be a slight chance
•
of electric shock from lightning.
Do not use the headset to report a gas leak in the vicinity of the leak. Under
•
certain circumstances, a spark may be created when the adapter is plugged into
the power outlet, or when the headset is replaced in its cradle. This is a common
event associated with the closing of any electrical circuit. The user should
not plug the headset base into a power outlet, and should not put a charged
headset into the cradle, if the headset base is located in an environment
containing concentrations of flammable or flame-supporting gases, unless
there is adequate ventilation. A spark in such an environment could create a fire
or explosion. Such environments might include: medical use of oxygen without
adequate ventilation; industrial gases (cleaning solvents; gasoline vapors; etc.); a
leak of natural gas; etc.
Do not use this product near water, or when you are wet. For example, do
•
not use it in a wet basement or shower, or next to a swimming pool, bathtub,
kitchen sink, or laundry tub. Do not use liquids or aerosol sprays for cleaning.
If the product comes in contact with any liquids, unplug any line or power cord
immediately. Do not plug the product back in until it has dried thoroughly.
Install this product in a protected location where no one can trip over any
•
line or power cords. Protect cords from damage or abrasion.
If this product does not operate normally, see the Troubleshooting section
•
on pages 50-60 of this user’s manual. If you cannot solve the problem, or if
the product is damaged, refer to the Limited warranty section on
pages 68-70. Do not open this product except as may be directed in your
user’s manual. Opening the product or reassembling it incorrectly may expose
you to hazardous voltage or other risks.
Replace batteries only as described in your user’s manual (page 12). Do not
•
burn or puncture batteries — they contain caustic chemicals.
This power adapter is intended to be correctly oriented in a vertical or
•
floor mount position. The prongs are not designed to hold the plug in place if
it is plugged into a ceiling, an under-the-table or a cabinet outlet.
62
Appendix
Important safety information
Caution: Use only the power adapter provided with this product. To
obtain a replacement, visit our website at
www.telephones.att.com or call
1 (800) 222-3111. In Canada, dial 1 (866) 288-4268.
Especially about cordless headsets
Privacy: The same features that make a cordless headset convenient create
•
some limitations. Telephone calls are transmitted between the headset base and
the headset by radio waves, so there is a possibility that your cordless headset
conversations could be intercepted by radio receiving equipment within range
of the cordless headset. For this reason, you should not think of cordless
headset conversations as being as private as those on corded telephones.
Electrical power: The headset base of this cordless headset must be
•
connected to a working electrical outlet which is not controlled by a wall
switch. Calls cannot be made from the headset if the headset base is
unplugged or switched off, or if the electrical power is interrupted.
Potential TV interference: Some cordless headsets operate at frequencies
•
that may cause interference to TVs and VCRs. To minimize or prevent such
interference, do not place the headset base of the cordless headset near or
on top of a TV or VCR. If interference is experienced, moving the cordless
headset farther away from the TV or VCR will often reduce or eliminate the
interference.
Rechargeable batteries: This product contains lithium-ion rechargeable
•
batteries. Exercise care in handling batteries in order not to create a short
circuit with conductive material such as rings, bracelets and keys. The battery
or conductor may overheat and cause harm. Observe proper polarity between
the battery and the battery charger.
Lithium-ion rechargeable batteries: Dispose of these batteries in a safe
•
manner. Do not burn or puncture. Like other batteries of this type, if burned or
punctured, they could release caustic material which could cause injury.
The RBRC™ Seal means that the manufacturer is voluntarily
participating in an industry program to collect and recycle
lithium-ion rechargeable batteries when taken out of service
within the United States. These batteries may be taken to a
participating local retailer of replacement batteries or recycling
center. You may call 1-800-8-BATTERY for locations accepting
spent Li-ion batteries.
63
Appendix
Important safety information
CAUTION
There may be a risk of explosion if you use a wrong type of battery. Use only
•
the supplied rechargeable battery or replacement battery (model BT191665).
Change this product's batteries only in accordance with the instructions and
•
limitations specified in this manual.
As with any batteries, do not allow conductive materials such as rings,
•
bracelets or keys to come in contact with the metallic parts of the battery. The
battery or conductor may overheat and cause harm.
Do not open or damage the batteries. Released electrolyte is corrosive and
•
may cause injury to the eyes or skin. The electrolyte may be toxic if swallowed.
Do not dispose of the batteries in a fire. Check with local waste management
•
codes for special disposal instructions. To prevent fire or shock hazard, do not
expose this product to water or any type of moisture.
Observe proper polarity orientation between the battery and metallic contacts.
•
Do not disassemble your headset. There are no user-serviceable parts inside. Refer
•
to qualified service personnel for servicing.
Precautions for users of implanted cardiac pacemakers
Cardiac pacemakers (applies only to digital cordless devices):
Wireless Technology Research, LLC (WTR), an independent research entity, led a
multidisciplinary evaluation of the interference between portable digital cordless
devices and implanted cardiac pacemakers. Supported by the U.S. Food and Drug
Administration, WTR recommends to physicians that:
Pacemaker patients
Should keep digital cordless devices at least six inches from the pacemaker.
•
Should NOT place digital cordless devices directly over the pacemaker, such as
•
in a breast pocket, when it is turned ON.
Should use the digital cordless device at the ear opposite the pacemaker.
•
WTR’s evaluation did not identify any risk to bystanders with pacemakers from
other persons using digital cordless devices.
SAVE THESE INSTRUCTIONS
64
Appendix
FCC Part 68 and ACTA
This equipment complies with Part 68 of the FCC rules and with technical
requirements adopted by the Administrative Council for Terminal Attachments
(ACTA). The label on the back or bottom of this equipment contains, among other
things, a product identifier in the format US: AAAEQ##TXXXX. This identifier must
be provided to your telephone service provider upon request.
The plug and jack used to connect this equipment to premises wiring and the
telephone network must comply with applicable Part 68 rules and technical
requirements adopted by ACTA. A compliant telephone cord and modular plug
is provided with this product. It is designed to be connected to a compatible
modular jack that is also compliant. An RJ11 jack should normally be used for
connecting to a single line and an RJ14 jack for two lines. See the installation
instructions in the user’s manual.
The Ringer Equivalence Number (REN) is used to determine how many devices you
may connect to your telephone line and still have them ring when you are called.
The REN for this product is encoded as the 6th and 7th characters following the
US: in the product identifier (e.g. if ## is 03, the REN is 0.3). In most, but not
all areas, the sum of all RENs should be five (5.0) or less. For more information,
please contact your telephone service provider.
This equipment may not be used with party lines. If you have specially wired
alarm dialing equipment connected to your telephone line, ensure the connection
of this equipment does not disable your alarm equipment. If you have questions
about what will disable alarm equipment, consult your telephone service provider
or a qualified installer.
If this equipment is malfunctioning, it must be unplugged from the modular jack
until the problem has been corrected. Repairs to this telephone equipment can
only be made by the manufacturer or its authorized agents. For repair procedures,
follow the instructions outlined under the Limited warranty.
If this equipment is causing harm to the telephone network, the telephone service
provider may temporarily discontinue your telephone service. The telephone service
provider is required to notify you before interrupting service. If advance notice is not
practical, you will be notified as soon as possible. You will be given the opportunity
to correct the problem and the telephone service provider is required to inform you
of your right to file a complaint with the FCC. Your telephone service provider may
make changes in its facilities, equipment, operation, or procedures that could affect
the proper functioning of this product. The telephone service provider is required to
notify you if such changes are planned.
65
Appendix
FCC Part 68 and ACTA
If this product is equipped with a corded or cordless handset, it is hearing aid
compatible.
If this product has memory dialing locations, you may choose to store emergency
telephone numbers (e.g. police, fire, medical) in these locations. If you do store or
test emergency numbers, please:
Remain on the line and briefly explain the reason for the call before hanging up.
Perform such activities in off-peak hours, such as early morning or late evening.
Industry Canada
Operation is subject to the following two conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any interference, including
interference that may cause undesired operation.
The term ‘’IC:‘’ before the certification/registration number only signifies that the
Industry Canada technical specifications were met.
The Ringer Equivalence Number (REN) for this terminal equipment is 1.0. The
REN is an indication of the maximum number of devices allowed to be connected
to a telephone interface. The termination on an interface may consist of any
combination of devices subject only to the requirement that the sum of the RENs
of all the devices does not exceed five.
This product meets the applicable Industry Canada technical specifications.
66
Appendix
FCC Part 15
This equipment has been tested and found to comply with the requirements for a
Class B digital device under Part 15 of the Federal Communications Commission
(FCC) rules.
These requirements are intended to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses and
can radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular
installation.
If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which
the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Changes or modifications to this equipment not expressly approved by the
party responsible for compliance could void the user’s authority to operate the
equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation. Privacy of communications may not be ensured
when using this device.
To ensure safety of users, the FCC has established criteria for the amount of radio
frequency energy that can be safely absorbed by a user or bystander according
to the intended usage of the product. This product has been tested and found
to comply with the FCC criteria. The headset may be safely held against the ear
of the user. The headset base shall be installed and used such that parts of the
user’s body other than the hands are maintained at a distance of approximately
20 cm (8 inches) or more.
This Class B digital apparatus complies with Canadian ICES-003.
67
Appendix
Limited warranty
The AT&T brand is used under license - any repair, replacement or warranty
service, and all questions about this product should be directed to: In the United
States of America, visit www.telephones.att.com or call
1 (800) 222-3111. In Canada, call 1 (866) 288-4268.
1. What does this limited warranty cover?
The manufacturer of this AT&T branded product warrants to the holder of
a valid proof of purchase (“CONSUMER” or “you”) that the product and all
accessories provided in the sales package (“PRODUCT”) are free from defects
in material and workmanship, pursuant to the following terms and conditions,
when installed and used normally and in accordance with the PRODUCT
operating instructions. This limited warranty extends only to the CONSUMER
for products purchased and used in the United States of America and Canada.
2. What will be done if the PRODUCT is not free from defects in materials
and workmanship during the limited warranty period (“materially defective
PRODUCT”)?
During the limited warranty period, the manufacturer’s authorized service
representative will repair or replace at the manufacturer’s option, without
charge, a materially defective PRODUCT. If the manufacturer repairs the
PRODUCT, they may use new or refurbished replacement parts. If the
manufacturer chooses to replace the PRODUCT, they may replace it with a
new or refurbished PRODUCT of the same or similar design. The manufacturer
will retain defective parts, modules, or equipment. Repair or replacement of
the PRODUCT, at the manufacturer’s option, is your exclusive remedy. The
manufacturer will return repaired or replacement products to you in working
condition. You should expect the repair or replacement to take approximately
30 days.
3. How long is the limited warranty period?
The limited warranty period for the PRODUCT extends for ONE (1) YEAR from
the date of purchase. If the manufacturer repairs or replaces a materially
defective PRODUCT under the terms of this limited warranty, this limited
warranty also applies to repaired or replacement PRODUCT for a period of
either (a) 90 days from the date the repaired or replacement PRODUCT is
shipped to you or, (b) the time remaining on the original one-year limited
warranty; whichever is longer.
68
Appendix
Limited warranty
4. What is not covered by this limited warranty?
This limited warranty does not cover:
PRODUCT that has been subjected to misuse, accident, shipping or other
•
physical damage, improper installation, abnormal operation or handling,
neglect, inundation, fire, water, or other liquid intrusion; or
PRODUCT that has been damaged due to repair, alteration, or modification
•
by anyone other than an authorized service representative of the
manufacturer; or
PRODUCT to the extent that the problem experienced is caused by signal
•
conditions, network reliability or cable or antenna systems; or
PRODUCT to the extent that the problem is caused by use with non-AT&T
•
accessories; or
PRODUCT whose warranty/quality stickers, PRODUCT serial number plates
•
or electronic serial numbers have been removed, altered or rendered
illegible; or
PRODUCT purchased, used, serviced, or shipped for repair from outside the
•
United States of America or Canada, or used for commercial or institutional
purposes (including but not limited to products used for rental purposes); or
PRODUCT returned without a valid proof of purchase (see item 6 below);
•
-orCharges for installation or setup, adjustment of customer controls, and
•
installation or repair of systems outside the unit.
5. How do you get warranty service?
To obtain warranty service in the United States of America, visit
www.telephones.att.com or call
1 (800) 222-3111. In Canada, call 1 (866) 288-4268.
NOTE: Before calling for service, please review the user’s manual; a check of
the PRODUCT's controls and features may save you a service call.
Except as provided by applicable law, you assume the risk of loss or damage
during transit and transportation and are responsible for delivery or handling
charges incurred in the transport of the PRODUCT(s) to the service location.
The manufacturer will return repaired or replaced PRODUCT under this limited
warranty to you. Transportation, delivery or handling charges are prepaid. The
manufacturer assumes no risk for damage or loss of the PRODUCT in transit.
If the PRODUCT failure is not covered by this limited warranty, or proof of
purchase does not meet the terms of this limited warranty, the manufacturer
will notify you and will request that you authorize the cost of repair prior to any
further repair activity. You must pay for the cost of repair and return shipping
costs for the repair of products that are not covered by this limited warranty.
69
Appendix
Limited warranty
6. What must you return with the PRODUCT to get warranty service?
You must:
Return the entire original package and contents including the PRODUCT to
a.
the service location along with a description of the malfunction or difficulty;
and
Include a “valid proof of purchase” (sales receipt) identifying the PRODUCT
b.
purchased (PRODUCT model) and the date of purchase or receipt; and
Provide your name, complete and correct mailing address, and telephone
c.
number.
7. Other limitations
This warranty is the complete and exclusive agreement between you and the
manufacturer of this AT&T branded PRODUCT. It supersedes all other written
or oral communications related to this PRODUCT. The manufacturer provides
no other warranties for this PRODUCT. The warranty exclusively describes all of
the manufacturer’s responsibilities regarding the PRODUCT. There are no other
express warranties. No one is authorized to make modifications to this limited
warranty and you should not rely on any such modification.
State/Provincial Law rights: This warranty gives you specific legal rights, and
you may also have other rights which vary from state to state or province to
province.
Limitations: Implied warranties, including those of fitness for a particular
purpose and merchantability (an unwritten warranty that the PRODUCT is fit
for ordinary use) are limited to one year from date of purchase. Some states/
provinces do not allow limitations on how long an implied warranty lasts, so
the above limitation may not apply to you. In no event shall the manufacturer
be liable for any indirect, special, incidental, consequential, or similar damages
(including, but not limited to lost profits or revenue, inability to use the
PRODUCT or other associated equipment, the cost of substitute equipment, and
claims by third parties) resulting from the use of this PRODUCT. Some states/
provinces do not allow the exclusion or limitation of incidental or consequential
damages, so the above limitation or exclusion may not apply to you.
Please retain your original sales receipt as proof of purchase.
70
Appendix
Technical specifications
RF frequency band
Channels 5
Operating temperature 32°F - 122°F
Headset base voltage
(AC voltage, 60Hz)
Headset base voltage
(AC adapter output)
Headset voltage 3.2VDC - 4.2VDC
Replacement battery 3.7V 240mAH
DECT 6.0 digital technology
Digital Enhanced Cordless Telecommunications (DECT) 6.0 is a new frequency band
that transmits your voice across multiple channels. This technology provides superior
quality of voice and sound, high protection against wiretapping and better range
than 2.4 GHz and 5.8 GHz phone systems, while not interfering with wireless routers.
Operating range
This cordless headset operates within the maximum power allowed by the
Federal Communications Commission (FCC). Even so, this headset and headset
base can communicate over only a certain distance, which can vary with the
locations of the headset base and headset, the weather, and the construction of
your home or office.
Extended range and clarity
Experience the best in long-range coverage and clarity, provided by a unique
antenna design and advances in noise-filtering technology. The TL7912 is a fully
cordless DECT 6.0 headset offering a range of up to 500 feet. Open range test was
performed by Wyle Laboratories, an independent commercial test facility. “Up to
500 feet” cordless headset range refers to the maximum open field range. Actual
range may vary depending on intervening obstacles.
Sound level protection technology conforms to the current regulations and is used to
filter out the loud and high-pitched noises.
1921.536MHz - 1928.448MHz
0°C - 50°C
96Vrms - 127Vrms
6VDC @300mA
7VDC @300mA
Encrypted for added security
The 64 bit encryption adds an extra layer of security between your TL7912
headset and TL7912 base to keep your conversations private.
71
Index73Index
Index
A
AC adapter 13, 16, 18, 71
Adjust
corded handset audio 22
height of the lifter arm 24
sensitivity level 28
switch hook presser
position 24
Alert tones 4
Answer
a call in PHONE mode 39
Anti-slip pad 26
Attach lifter 23
Auxiliary ring detector
installation 27
sensitivity adjust 28
B
Base adapter 16, 18
Battery charging 13
Battery installation 12
Behind the neck band 35–37
C
Caller ID announce 41
Charging cradle 5, 13
Corded handset audio
adjust switch 7
Corded handset
connected 6, 16, 18, 21
Corded phone
connection 15, 17
D
Deregistration 49
Dial tone 24, 25, 39
DSL 11, 15, 17, 21
E
Earbud 29
Ear hook 30–32
End a call 40
H
Head band 33–34
Headset
alert tones 4
attachments 29–37
lights 2
operation 38–44
registration 45–48
ringer 40
Headset base 15, 17
Headset base lights 5
I
Incoming call
answer in PHONE mode 39
Internal ring detector 27
L
Large lifter pad 26
Light
headset 2
headset base 5
Limited warranty 68–70
Listening volume 42
72
Index
M
Magnetic charging
mount 5, 13
Maintenance 61
Mute 43
N
Neck band 35–37
O
Operating range 71
Over the ear hook 30–32
Over the head band 33–34
P
Power off 38
Power on 38
Q
Quick reference guide
handset lifter 8–10
headset 2–4
headset base 5–7
S
Sensitivity level 28
Small lifter pad 26
Speaking volume 42
Status light 10
Switch hook presser 24
T
Technical specifications 71
Temporary ringer silencing 41
Troubleshooting 50–60
U
USB port 6, 18
V
Voice command 40
Volume control
listening volume 42
ringer 40
speaking volume 42
R
Replace a headset 49
Ring detector 10, 27–28
Ringer 40
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Printed in China. Issue 6 AT&T 06/13
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