ATT Dect 6.0 User Manual

							
54

Appendix

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).
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Troubleshooting 
						

							
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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".
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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). 
						

							
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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 73-75 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.
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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 mentioned 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. 
						

							
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Appendix

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 mentioned 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.
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Troubleshooting 
						

							
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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.
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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.
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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. 
						

							
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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 73-75. 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.
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Appendix

Important safety information
CAUTIONS:
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.
Use only the supplied rechargeable battery or replacement battery (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.
To prevent risk of fire or battery explosion, replace with the correct battery type. Dispose of used batteries according to the instructions.
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.
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