AT&T GL2101-0 User manual

User’s manual
GL2101-0
DECT 6.0 expansion handset
for use with AT&T models
GL2101/GL2101-2
DECT 6.0 cordless telephone

Congratulations
on your purchase of this AT&T product. Before using this AT&T
product, please read the Important safety information section on
pages 1-3 of this manual. For complete instructions, please
refer to the manual provided with your GL2101/GL2101-2 telephone.
You can also visit our website at
https://telephones.att.com or call 1 [phone]. In
Canada, dial 1 [phone].
This telephone meets the California Energy Commission regulations for
energy consumption. Your telephone is set up to comply with the energy-
conserving standards right out of the box. No further action is necessary.
Model number: GL2101-0
Type: DECT 6.0 expansion handset
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 telephone base.
Save your sales receipt and original packaging in case it is
necessary to return your telephone for warranty service.
© 2021 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.
Telephones identied 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.
The ENERGY STAR® program (www.energystar.gov) recognizes and
encourages the use of products that save energy and help protect
our environment. We are proud to supply this product with an
ENERGY STAR® qualied power adapter meeting the latest energy
eciency guidelines.

Parts checklist
Your telephone package contains the following items. Save your
sales receipt and original packaging in the event warranty service
is necessary.
Battery for
cordless handset
Cordless handset Charger for cordless
handset with power
adapter installed
Battery
compartment
cover
User’s manual
THIS SIDE UP / CE CÔTÉ VERS LE HAUT
Battery Pack / Bloc-piles :
BT162342/BT262342 (2.4V 300mAh Ni-MH)
WARNING / AV ERTISSEMENT :
DO NOT BURN OR PUNCTURE BATTERIES.
NE PAS INCINÉRER OU PERCER LES PILES.
Made in China / Fabriqué en chine GP1621
User’s manual
GL2101-0
DECT 6.0 expansion handset
for use with AT&T models
GL2101/GL2101-2
DECT 6.0 cordless telephone

User’s manual
GL2101-0
DECT 6.0 expansion handset
for use with AT&T models
GL2101/GL2101-2
DECT 6.0 cordless telephone
Table of contents
Getting started
Important safety information....................................................................................................1
Safety information ........................................................................................................................1
Especially about cordless telephones.............................................................................2
Precautions for users of implanted cardiac pacemakers..................................3
ECO mode...........................................................................................................................................3
Especially about telephone answering systems......................................................3
Installation ..............................................................................................................................................4
Quick reference guide.....................................................................................................................5
Charger installation..........................................................................................................................9
Battery installation and charging .........................................................................................10
Registration and deregistration
Add and register handsets ........................................................................................................13
Register a handset to your telephone base..............................................................13
Deregister handsets.......................................................................................................................15
Deregister all handsets from your telephone base.............................................15
Appendix
Troubleshooting................................................................................................................................16
Maintenance........................................................................................................................................25
For C-UL compliance..................................................................................................................... 26
Mesures de sécurité importantes................................................................................... 26
FCC Part 68 and ACTA..................................................................................................................30
FCC Part 15............................................................................................................................................32
California Energy Commission battery charging testing instructions........33
Limited warranty .............................................................................................................................34
Technical specications...............................................................................................................37
DECT 6.0 digital technology .................................................................................................37
Telephone operating range..................................................................................................37
Redening long range coverage and clarity.............................................................37
Simulated full-duplex handset and base speakerphones...............................37

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, re, or electric shock.
Safety information
fRead and understand all instructions in the user’s manual. Observe all markings on
the product.
fAvoid using a telephone during a thunderstorm. There may be a slight chance of
electric shock from lightning.
fDo not use a telephone in the vicinity of a gas leak. Under certain circumstances,
a spark may be created when the adapter is plugged into the power outlet, or
when the handset is replaced in its cradle. This is a common event associated with
the closing of any electrical circuit. In an inadequately ventilated environment,
the user should not plug the phone into a power outlet, nor put a charged
handset into the cradle where there are concentrations of ammable or ame-
supporting gases. A spark in such an environment could create a re 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.
fDo not use this product near water or when you are wet. For example, do not use
it in a wet basement or shower, nor next to a swimming pool, bathtub, kitchen sink
and laundry tub. Do not use liquids or aerosol sprays for cleaning. If the product
comes in contact with any liquid, unplug any line or power cord immediately. Do not
plug the product back in until it has dried thoroughly.
fInstall this product in a protected location where no one can trip over any line or
power cords. Protect cords from damage or abrasion.
fIf this product does not operate normally, see the Troubleshooting section on
pages 16-24 of this user’s manual. If you cannot solve the problem, or if the
product is damaged, refer to the Limited warranty section pages 34-36. Do
not open this product except as directed in your user’s manual. Opening the product
or reassembling it incorrectly may expose you to hazardous voltages or other risks.
fReplace batteries, only as described in your user’s manual (pages 10-12). Do
not burn or puncture batteries — they contain caustic chemicals.
fThis power adapter is intended to be correctly oriented in a vertical or oor mount
position. The prongs are not designed to hold the plug in place if it is plugged into a
ceiling or an under-the-table/cabinet outlet.
fFor pluggable equipment, the socket-outlet shall be installed near the equipment
and shall be easily accessible.
CAUTIONS:
fUse only the power adapter provided with this product. To obtain a replacement,
visit our website at https://telephones.att.com or call
1 [phone].In Canada, dial 1 [phone].
1
Getting started

Important safety information
2
Getting started
i
CAUTION: To prevent risk of re or battery explosion, replace with the correct
battery type. Dispose of used batteries according to the instructions.
fDisconnect the telephone line from the equipment before open the battery door.
Do not use the battery in following conditions:
fHigh or low extreme temperature during use, storage or transportation.
fReplacement of a battery with an incorrect type that can defeat a safeguard.
fDisposal of a battery into fire or a hot oven, or mechanically crushing or
cutting of a battery, that can result in an explosion.
fLeaving a battery in an extremely high temperature surrounding
environment that can result in an explosion or the leakage of flammable
liquid or gas.
fA battery subjected toextremely low air pressure that can result in an
explosion or the leakage of flammable liquid or gas.
fU se only the supplied rechargeable battery or replacement battery (model
BT162342/BT262342). To order, visit our website at
https://telephones.att.com,or call 1 [phone]. In
Canada, dial 1 [phone].
fThe applied nameplate is located at the bottom or near of the product.
Especially about cordless telephones
fPrivacy: The same features that make a cordless telephone convenient create
some limitations. Telephone calls are transmitted between the telephone base
and the handset by radio waves, so there is a possibility that your cordless
telephone conversations could be intercepted by radio receiving equipment within
range of the cordless handset. For this reason, you should not think of cordless
telephone conversations as being as private as those on corded telephones.
fElectrical power: The telephone base of this cordless telephone must be
connected to a working electrical outlet which is not controlled by a wall switch.
Calls cannot be made from the handset if the telephone base is unplugged,
switched o or if the electrical power is interrupted.
fPotential TV interference: Some cordless telephones operate at frequencies
that may cause interference to TVs and VCRs. To minimize or prevent such
interference, do not place the telephone base of the cordless telephone near
or on top of a TV or VCR. If interference is experienced, moving the cordless
telephone farther away from the TV or VCR will oen reduce or eliminate the
interference.
fRechargeable batteries: This product contains nickel-metal hydride 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.

3
Important safety information
Getting started
fNickel-metal hydride 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 nickel-
metal hydride 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 Ni-MH batteries.
The RBRC Seal and 1-800-8-BATTERY® are registered trademarks of
Call2recycle, Inc.
Precautions for users of implanted cardiac pacemakers
Cardiac pacemakers (applies only to digital cordless telephones):
Wireless Technology Research, LLC (WTR), an independent research entity, led
a multidisciplinary evaluation of the interference between portable wireless
telephones and implanted cardiac pacemakers. Supported by the U.S. Food and
Drug Administration, WTR recommends to physicians that:
Pacemaker patients:
fShould keep wireless telephones at least six inches from the pacemaker.
fShould NOT place wireless telephones directly over the pacemaker, such as in a
breast pocket, when it is turned ON.
fShould use the wireless telephone at the ear opposite the pacemaker.
WTR’s evaluation did not identify any risk to bystanders with pacemakers from
other persons using wireless telephones.
ECO mode
This power conserving technology reduces power consumption for optimal battery
performance. The ECO mode activates automatically whenever the handset is
synchronized with the telephone base.
Especially about telephone answering systems
Two-way recording: This unit does not sound warning beeps to inform the other
party that the call is being recorded. To ensure that you are in compliance with any
federal or state regulations regarding recording a telephone call, you should start
the recording process and then inform the other party that you are recording the
conversation.
SAVE THESE INSTRUCTIONS

4
See pages 10-12
for easy instructions.
You must install and
charge the battery before
using the telephone. STOP!
Installation
Your product may be shipped with a protective sticker covering the
handset display - remove it before use.
For customer service or product information, visit our website at
https://telephones.att.com or call 1 [phone].
In Canada, dial 1 [phone].
Avoid placing the charger too close to:
fCommunication devices such as television sets, VCRs, or other
cordless telephones.
fExcessive heat sources.
fNoise sources such as a window with trac outside, motors,
microwave ovens, refrigerators, or uorescent lighting.
fExcessive dust sources such as a workshop or garage.
fExcessive moisture.
fExtremely low temperature.
fMechanical vibration or shock such as on top of a washing
machine or workbench.
Getting started

Quick reference guide
Getting started
5
1CHARGE light fOn when the handset is charging in the
telephone base or charger.
2
VOL pDIR fPress to show directory entries when the
handset is not in use.
fPress to scroll up while in menus.
fWhile entering names or numbers, press to
move the cursor to the right.
fPress to increase the listening volume when
on a call.
VOL qCID fPress to show caller ID log when the
handset is not in use.
fPress to scroll down while in menus.
fWhile entering names or numbers, press to
move the cursor to the le.
fPress to decrease the listening volume
when on a call.
3REDIAL fPress repeatedly to view the last 10
numbers dialed.
4
PHONE/
FLASH
fPress to make or answer a call.
fDuring a call, press to answer an incoming
call when you receive a call waiting alert.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

Quick reference guide
Getting started
6
5fWhile reviewing a caller ID log entry, press
repeatedly to add or remove 1 in front of
the telephone number before dialing or
saving it in the directory.
fPress and hold to set or to dial your
voicemail number.
6fPress to switch to tone dialing temporarily
during a call if you have pulse service.
7
/SPEAKER fPress to make or answer a call using the
speakerphone.
fPress to switch between the speakerphone
and the handset.
8
DELETE fWhile reviewing the caller ID log, the
directory or the redial memory, press to
delete an individual entry.
fWhile predialing, press to delete digits.
9INT fPress to start an intercom conversation or
transfer a call (for multi-handset models
only).
10 MENU/
SELECT
fWhen the handset is not in use, press to
show the menu.
fWhile in the menu, press to select an item or
save an entry or setting.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

Quick reference guide
Getting started
7
11 OFF/
CANCEL
fDuring a call, press to hang up.
fWhile in a menu, press to cancel an
operation, back up to the previous menu, or
exit the menu display; or press and hold this
button to exit to idle mode.
fWhen the handset is ringing, press to mute
the ringer temporarily.
fPress and hold while the telephone is not in
use to erase the missed call indicator.
12 fWhile entering names or numbers, press to
add a spacing.
13
(pound key)
fPress repeatedly to display other dialing
options when reviewing a caller ID log entry.
fPress and hold to enter the QUIET mode
setting screen, or to deactivate QUIET
mode.
14 MUTE fDuring a call, press to mute the microphone.
fWhen the handset is ringing, press to mute
the ringer temporarily.
15 PAUSE fWhile entering numbers, press to insert a
dialing pause.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

Quick reference guide
Getting started
8
For complete instructions, refer to the manual provided with your
GL2101/GL2101-2 telephone system. If you are unable to nd your
manual, go to https://telephones.att.com/manuals to read
and/or download the manual.
Main menu
The selected menu item is
highlighted.
Menu
Feature menu
fDirectory
fCaller ID log
fIntercom
fCall block
fRingers
fSet date/time
fSettings
Using menus:
1. Press MENU/SELECT in idle mode (when the telephone is not in
use) to enter the main menu.
2. Press CID or DIR to scroll through menu items.
3. Press MENU/SELECT to select or save the highlighted item.
-OR-
Press OFF/CANCEL to cancel an operation, back up to the
previous menu, or exit the menu display.

IMPORTANT INFORMATION
1. Use only the power adapter supplied with this product. To order a replacement
power adapter, visit our website at https://telephones.att.com
or call 1 [phone]. In Canada, dial 1 [phone].
2. The power adapter is intended to be correctly oriented in a vertical or oor
mount position. The prongs are not designed to hold the plug in place if it is
plugged into a ceiling, under-the-table or cabinet outlet.
9
Charger installation
Install the charger, as shown below.
Getting started
Plug the large end of the
charger’s power adapter
into an electrical outlet not
controlled by a wall switch.
Ensure the small end of the charger’s
power adapter is plugged into the power
jack on the bottom of the charger.

10
Battery installation and charging
Install the battery, as shown on page 11. Once you have installed
the battery, the screen indicates the battery status (see the
following table). If necessary, place the handset in the telephone
base or charger to charge the battery. For best performance, keep
the handset in the telephone base or charger when not in use. The
battery is fully charged aer 16 hours of continuous charging. See
the table on page 37 for battery operating times.
If the screen is blank or shows Put in charger and a ashing , you
need to charge the handset without interruption for at least 30
minutes to give the handset enough charge to use the telephone
for a short time. When the battery is low, the handset shows Low
battery and a ashing . If you are on a call in low battery mode,
the handset beeps every minute.
The following table summarizes the battery charge indicators and
actions to take.
Battery indicators Battery status Action
The screen is blank or
shows Put in charger
and ashes.
The battery has no or
very little charge. The
handset cannot be used.
Charge without interruption
(at least 30 minutes).
The screen shows
Low battery and
ashes.
Battery has enough
charge to be used for a
short time.
Charge without interruption
(at least 30 minutes).
The screen shows
HANDSET X.
Battery is charged. To keep the battery charged,
place it in the telephone
base or charger when not
in use.
Getting started

Battery installation and charging
Getting started
11
1. Plug the battery connector securely into the socket inside the
handset battery compartment. Insert the supplied battery with
the label THIS SIDE UP facing up, as indicated.
2. Align the cover at against the battery compartment, then slide
it upwards until it clicks into place.
THISSIDE UP/ CE CÔTÉ VERS LE HAUT
BatteryPack / Bloc-piles :
BT183342/BT283342(2.4V 400mAh Ni-MH)
WARNING/ AVERTISSEMENT :
DONOT BURN OR PUNCTURE BATTERIES.
NEPAS INCINÉRER OU PERCER LES PILES.
Madein China / Fabriqué en chine CR1535
THIS SIDE UP
THIS SIDE UP/ CE CÔTÉ VERS LE HAUT
BatteryPack / Bloc-piles :
BT183342/BT283342(2.4V 400mAh Ni-MH)
WARNING/ AVERTISSEMENT :
DONOT BURN OR PUNCTURE BATTERIES.
NEPAS INCINÉRER OU PERCER LES PILES.
Madein China / Fabriqué en chine CR1535

IMPORTANT INFORMATION
1. Use only the supplied rechargeable battery or replacement battery
(model BT162342/BT262342). To order, visit our website at
https://telephones.att.com or call 1 [phone]. In
Canada, dial 1 [phone].
2. If you do not use the handset for a long time, disconnect and remove
the battery to prevent possible leakage.
Battery installation and charging
Getting started
12
3. Charge the handset by placing it face forward in the telephone
base or charger. The CHARGE light on the top of the handset is
on during charging.
To replace the battery,
press the tab and slide the
battery compartment cover
downwards. Li out the old
battery and disconnect it
from the handset. Follow the
instructions to install and
charge a new battery.
THISSIDE UP /CE CÔTÉ VERS LE HAUT
BatteryPack / Bloc-piles :
BT183342/BT283342(2.4V 400mAh Ni-MH)
WARNING/ AVERTISSEMENT :
DONOT BURN OR PUNCTURE BATTERIES.
NEPAS INCINÉRER OU PERCER LES PILES.
Madein China / Fabriqué en chine CR1535

Add and register handsets
Before using a new GL2101-0 handset, make sure it is registered
with an AT&T GL2101/GL2101-2 telephone system (purchased
separately). These telephone systems can support up to ve
handsets.
The handset(s) provided with your telephone system are already
registered as HANDSET 1, and so forth. Additional handsets are
assigned numbers in the sequential order they are registered (up
to HANDSET 5). Each handset must be registered to the telephone
base before use.
Register a handset to your telephone base
1. Before you begin registration, make sure the handset is out of the
telephone base or charger and shows To register HS... and ...see
manual alternately.
2. Put the handset you wish to register on the telephone base cradle.
Registration and deregistration
13
3. The handset shows Registering.... If the registration is
successful, the handset beeps and its screen displays
Registered. The handset is now registered with the telephone
base. The registration process takes about 90 seconds.
For registration, put the handset on the
telephone base, not the handset charger.

Add and register handsets
Notes:
fYou cannot register a handset if any other system handset is in use.
fIf you try to register more than five handsets to the telephone base, the telephone base shows
Registration slots are full and sounds two beeps.
Registration and deregistration
14

Deregister handsets
You may need to deregister your handsets if:
fYou have ve registered handsets and need to replace a handset.
-OR-
fYou wish to change the designated handset number of your
registered handsets.
You must rst deregister ALL handsets, and then register each
handset 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 handsets from your telephone base
In addition to the cordless handsets, this operation will also
deregister all cordless headsets registered to your telephone base.
1. Make sure that all handsets are out of the telephone base and
chargers before you begin deregistration.
2. Press and hold FIND HS on the telephone base for about 10
seconds. Release FIND HS, and then immediately press FIND HS
again. It takes up to one minute to complete the deregistration
process. Before registering the handset again, wait for the
cordless handset screen to display To register HS... and ...see
manual alternately.
3. Aer deregistering, register each handset again individually
following the registration instructions on the pages 13-14.
Notes:
fIf the deregistration fails, you may need to reset the system and try again. To reset, unplug the power
from the telephone base and plug it back in.
fYou cannot deregister the handset(s) if any other system handset is in use.
fEven if the battery is depleted, you can still deregister the handset by following the steps mentioned
above. After the handset is charged for at least 10 minutes, the screen shows To register... and ...see
manual alternately.
Registration and deregistration
15

Troubleshooting
If you have diculty with your phone, please try the following
suggestions. For Customer Service, visit our website at
https://telephones.att.com or call 1 [phone]. In
Canada, dial 1 [phone].
The handset registration is unsuccessful.
fFollow the handset registration instructions to register the handset
again (see Add and register handsets on pages 13-14).
My telephone doesn’t work at all.
fMake sure the power cord is securely plugged in.
fMake sure you plug the battery connector securely into the
cordless handset.
fMake sure you plug the telephone line cord securely and rmly
into the telephone base and the telephone wall jack.
fCharge the battery in the cordless handset for at least 16 hours.
For optimum daily performance, return the cordless handset to
the telephone base or charger when not in use.
fIf the battery is depleted, it might take approximately 30 minutes
to charge the handset before it shows Low battery. See page
10 for details.
fReset the telephone base. Unplug the electrical power. Wait for
approximately 15 seconds, then plug it back in. Allow up to one
minute for the cordless handset and telephone base to reset.
fYou may need to purchase a new battery. Refer to Battery
installation and charging in this user’s manual on pages
10-12.
Appendix
16