AT&T GL2101 User manual

Complete user’s manual
GL2101/GL2101-2
DECT 6.0 cordless telephone

Congratulations
on purchasing your new AT&T product. Before using this AT&T product, please read
the Important safety information section on pages 1-3 of this manual.
Please thoroughly read this Complete 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 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.
This telephone system is compatible with certain AT&T DECT 6.0 cordless headsets.
Visit https://telephones.att.com/accessories for a list of compatible
cordless headsets.
Model number: GL2101 (one-handset system
GL2101-2 (two-handset system)
Type: DECT 6.0 cordless telephone
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.
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
mark this product with the ENERGY STAR® label indicating it meets the latest energy
eciency guidelines.
©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.

Parts checklist
Your telephone package contains the following items. Save your sales receipt
and original packaging in the event warranty service is necessary.
Quick start guide
Quick start guide
GL2101/GL2101-2
DECT 6.0 cordless telephone
Telephone line
cord
Power adapter for
telephone base
Telephone base
Cordless handset
(2 for GL2101-2)
Charger for cordless
handset with power
adapter installed
(1 for GL2101-2)
Battery for cordless
handset
(2 for GL2101-2)
Battery
compartment cover
(2 for GL2101-2)
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

Complete user’s manual
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 - handset.........5
Quick reference guide - telephone
base .........................................................................9
Telephone base and charger
installation ....................................................... 10
Telephone base installation........... 10
Charger installation.............................. 11
Battery installation and charging .....12
Telephone settings
Handset settings..........................................15
Ringer volume..........................................15
Ringer tone.................................................15
LCD language............................................16
Set date and time..................................16
Set speed dial voicemail
number..........................................................17
Voicemail (visual message
waiting) indicator...................................17
Clear voicemail indicator/
indication.................................................... 18
Key tone...................................................... 18
Home area code .....................................19
Dial mode ...................................................20
QUIET mode...............................................21
Telephone operation
Telephone operation................................ 22
Make, answer or end a call.............. 22
Silence the ringer.................................. 22
Call waiting................................................ 22
Options while on calls .............................. 23
Handset speakerphone .................... 23
Volume control....................................... 23
Mute............................................................... 23
Temporary tone dialing.................... 23
Chain dialing.............................................24
Redial ................................................................... 25
Last number redial............................... 25
Save a redial entry to the
directory......................................................26
Delete a redial entry............................26
Handset locator............................................ 27
Multiple handset use
Join a call in progress ...............................28
Intercom............................................................29
Initiate an intercom call....................29

Answer an incoming call during an
intercom call.............................................30
Call transfer using intercom.................31
Directory
About the directory................................... 32
Create and review entries..................... 33
Create a new directory entry........33
Add a predialed telephone
number to the directory .................. 35
Review the directory...........................36
Search by name ..................................... 37
Dial a directory entry..........................38
Edit a directory entry .........................38
Dial, delete and edit a directory
entry.....................................................................39
Delete a directory entry...................39
Delete all directory entries.............39
Caller ID
About caller ID...............................................40
Information about caller ID
with call waiting .....................................40
Caller ID operation.......................................41
How the caller ID log works............41
Missed (new) call indicator..............41
Memory match........................................41
Review the caller ID log.....................42
View dialing options............................43
Dial a caller ID log entry....................43
Save a caller ID log entry to the
directory......................................................44
Save a caller ID log entry to
the call block list....................................45
Reasons for missing caller ID
information .....................................................47
Call block
Call block settings.......................................48
Block unknown calls............................48
Add a call block list entry.................49
Review call block list ...........................50
Edit a call block list entry.................50
Save a caller ID log entry to
the call block list.....................................51
Unblock a telephone number....... 52
Mute rings of blocked calls............. 52
Appendix
Add and register handsets/
headsets............................................................ 53
Register a handset to your
telephone base....................................... 53
Deregister handsets.................................. 55
Deregister all handsets from the
telephone base....................................... 55
Screen icons, indicator lights
and alert tones..............................................56
Screen icons .............................................56
Handset indicator lights...................56
Handset alert tones ............................ 57
Screen messages........................................58
Troubleshooting...........................................60
Maintenance...................................................64
For C-UL compliance.................................65
Mesures de sécurité
importantes..............................................65
FCC Part 68 and ACTA..............................68
FCC Part 15.......................................................70
California Energy Commission
battery charging testing
instructions ......................................................71
Limited warranty......................................... 72
Technical specications..........................74
DECT 6.0 digital technology........... 74
Telephone operating range........... 74
Redening long range coverage
and clarity................................................... 74
Simulated full-duplex handset
and base speakerphones ................ 74
Index
Index..................................................................... 75

1
Important safety information
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 might 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 liquids,
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, read the Troubleshooting section on pages 60-63
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 72-73. 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 voltages or other risks.
fReplace batteries only as described in your user’s manual (pages 12-14). Do not burn or
puncture batteries — they contain caustic chemicals.
fThe power adapters are 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.
fFor pluggable equipment, the socket-outlet shall be installed near the equipment and shall be
easily accessible.
CAUTIONS:
fUse only the power adapters provided with this product. To obtain a replacement, visit our
website at https://telephones.att.com, or call 1 (800) 222–3111. In
Canada, dial 1 [phone].
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.
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.
Getting started
i

2
Getting started
Important safety information
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.
fUse 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.
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.

3
Getting started
Important safety information
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
Getting started
Installation
Install the telephone base close to a telephone jack and a power outlet not
controlled by a wall switch. The telephone base can be placed on a at surface.
For optimum range and better reception, place the telephone base in a central
and open location.
You may hear interference if your cellular phone is too close to the telephone
base during a CELLULAR call. Make sure that your Bluetooth enabled cellular
phone is within 15 feet of the telephone base in order to maintain a clear and
consistent connection between your Bluetooth cell phone, telephone base and
cell tower.
If you subscribe to high-speed Internet service (DSL - digital subscriber line)
through your telephone line, you must install a DSL lter between the
telephone line cord and the telephone wall jack (page 10). The lter prevents
noise and caller ID problems caused by DSL interference. Please contact your
DSL service provider for more information about DSL lters.
Your product may be shipped with a protective sticker covering the handset or
telephone base 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 telephone base and 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 washing machine or
workbench.
You must install and charge
the battery before using the
cordless handset.
See pages 12-14 for easy
instructions.

5
Getting started
Quick reference guide - handset
Handset
1
CHARGE light fOn when the handset is charging in the telephone
base or charger.
2VOL 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.
3
REDIAL fPress repeatedly to view the last 10 numbers dialed.
4PHONE/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

6
Getting started
Quick reference guide - handset
5
fWhile 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.
6
fPress 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.
8DELETE 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

7
Getting started
Quick reference guide - handset
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

8
Getting started
Quick reference guide - handset
Feature menu
fDirectory (page 32)
fCaller ID log (page 40)
fIntercom (page 29)
fCall block (page 48)
fRingers (page 15)
fSet date/time (page 16)
fSettings (page 16)
Main menu
The selected menu
item is highlighted.
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. Press and hold OFF/CANCEL on the handset to
return to idle mode.
Menu

9
Getting started
Quick reference guide - telephone base
2
12
1
Telephone base
1Charging pole
2FIND HS fPress to page all handsets.

10
Getting started
Telephone base and charger installation
Install the telephone base and charger, as shown below.
The telephone base is ready for tabletop use.
Telephone base installation
Plug one end of the
telephone line cord into a
telephone jack or a DSL lter.
Plug the small end of the
telephone base power adapter
into the power adapter jack on
the back of the telephone base.
Plug the large end of the
telephone base power adapter
into a power outlet not
controlled by a wall switch.
Plug the other end of the telephone
line cord into the telephone jack on
the back of the telephone base.
If you have DSL high-
speed Internet service, a
DSL lter (not included)
is required.
Route the
telephone line cord
through this slot.
Route the power
adapter cord through
this slot.

11
Getting started
Telephone base and charger installation
Charger installation
IMPORTANT INFORMATION
fUse only the power adapter(s) 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].
fThe power adapters are 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.
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.

12
Getting started
Battery installation and charging
Install the battery, as shown below. 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 74 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.
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.
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

13
Getting started
Battery installation and charging
2. Align the cover at against the battery compartment, then slide it upwards
until it clicks into place.
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.
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

14
Getting started
Battery installation and charging
IMPORTANT INFORMATION
fUse 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].
fIf you do not use the handset for a long time, disconnect and remove the
battery to prevent possible leakage.
Aer you install your telephone or power returns following
a power outage, the handset and telephone base will
prompt you to set the date and time. For instructions, see
Set date/time on page 16. To skip setting the date and
time, press OFF/CANCEL on the handset.
Date: MM/DD/YY
ECO
Time: HH:MM - -
ECO

15
Telephone settings
Handset settings
Ringer volume
You can select the ringer volume for incoming calls. A ringer
o icon shows when the volume is set to o.
To set the ringer volume:
1. Press MENU/SELECT in idle mode.
2. Press CID or DIR to highlight Ringers, then press
MENU/SELECT.
3. Press MENU/SELECT to select Home volume.
4. Press CID or DIR to sample each ringer volume for
home line.
5. Press MENU/SELECT to save.
Notes:
fChanging the handset ringer volume does not aect base ringer volume.
fIf the ringer volume is set to o, that handset or the telephone base is silenced for all
incoming calls.
fThe ringer volume level also determines the ringer levels of intercom calls.
Ringer tone
You can select the ringer tones for incoming calls.
To set the ringer tone on home line:
1. Press MENU/SELECT in idle mode.
2. Press CID or DIR to highlight Ringers, then press
MENU/SELECT.
3. Press CID or DIR to select Home ringtone, then press
MENU/SELECT,
4. Press CID or DIR to sample each ring tone for home line.
5. Press MENU/SELECT to save.
Note: When you turn o the ringer volume, you will not hear ringer tone samples.
Home volume
ECO
Volume:
ECO
Ringers
ECO
Home ringtone
ECO
Tone: 1
ECO
Ringers
ECO