User’s manual TL7912 DECT 6.
Congratulations on your purchase of this AT&T product. Before using this AT&T product, please read the Important safety information section on pages 51-54 of this manual. Please thoroughly read this user’s manual for all the feature operations and troubleshooting information necessary to install and operate your new AT&T product. You can also visit our website at www.telephones.att.com or call 1 (800) 222-3111. In Canada, dial 1 (866) 288-4268.
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 User’s manual TL7912 DECT 6.0 cordless headset and handset lifter TL7912 DECT 6.
Parts checklist (continued) Headset base power adapter Telephone line cord Anti-slip pad Corded phone connection cable USB cable Handset ������ lifter Large ���������� lifter���� pad Auxiliary ring detector Headset base
Optional accessory In this manual, there are references to TL7900. The TL7900 includes an expansion headset and a headset charger (up to two headsets can be used with the same headset base). TL7900 can be purchased separately. For more information about the product, visit our website at www.telephones.att.com.
User’s manual TL7912 DECT 6.
Getting started Quick reference guide - headset (On/off button and light) Press to make, answer or end a call (pages 31 and 32). Headset lights light status Red • On when the headset is charging in the headset base. • Flashes every 10 seconds to indicate the battery is low when the headset is not in the headset base. • Flashes three times to indicate the headset is powering off. Blue • On when a fully charged and registered headset is in the headset base.
Getting started Quick reference guide - headset VOL+/VOLPush the volume switch on the headset to the right or left to adjust the headset ringer volume while in idle mode (page 32) or the listening volume while on a call (page 35). Earpiece MUTE/FLASH Battery pack Press to mute the microphone during a call (page 36). Press and hold for two seconds to answer an incoming call when you receive a call waiting alert during a call (page 33).
Getting started Quick reference guide - headset Headset alert tones One short beep • Headset key tone. One short beep every 30 seconds • Muted headset microphone alert tone. Two beeps • Error alert tone. • The ringer volume is at its lowest setting. • The listening volume is at its highest or lowest setting. • Any key is pressed while the headset is out of range. Two low beeps • Call waiting alert tone. Two rapid beeps every 20 seconds • Low battery warning.
Getting started Quick reference guide - headset base Magnetic charging mount PAIR Place the headset here for charging. Use to initiate headset registration or deregistration. MUTE (light) PHONE (mode button and light) PC (mode button and light) Headset base lights MUTE (Red) • On when you are registering a headset. • Flashes when the mute function is in use. • Flashes when you are deregistering headset(s) from the headset base.
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 35). (USB port) Open the port cover to plug in the USB cable when in PC mode (page 23). LIFTER This jack is only used with the handset lifter. CORDED HANDSET CONNECTED/ YES/NO Choose the setting based on whether you are using a corded handset (page 13).
Getting started Quick reference guide - headset base CORDED PHONE CONNECTION This jack (blue dot) is only used with the corded phone connection cable (page 14). TEL WALL JACK (red dot) POWER jack (green dot) Corded handset audio adjust switch This switch is only used when you have connected the headset base to a corded telephone (page 15).
Getting started Quick reference guide - handset lifter SENSOR ADJ knob Adjusts the sensitivity of the ring detector (page 21). ADJUST LIFTER knob Adjusts the height of the lifter arm (page 17). 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.
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 21). Switch hook presser adjustment knob Adjusts the position of the switch hook presser (page 17). Small lifter pad Holds the earpiece of the corded telephone handset. STATUS light On in red when the ring detector is off (page 9). On in blue when the ring detector is on and the headset not in use (page 9).
Getting started Quick reference guide - handset lifter STATUS light Red • On when the headset is not in use and the ring detector is turned off. • Flashes slowly when the headset is in use and the ring detector is turned off. Blue • On when the headset is not in use and the ring detector is turned on. • Flashes four times every three seconds when the ring detector detects an incoming call. • Flashes slowly when the headset is in use and the ring detector is turned on.
Getting started Installation You must install and charge the battery before using the headset. STOP! See pages 11-12 for easy instructions. 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.
Getting started Battery installation The battery is permanently attached to the battery compartment cover (known as the battery pack). Do not try to separate them from each other. After installing the battery pack, charge it for at least 15 minutes. You may be able to make and receive short calls. For optimal performance, charge the headset battery for at least three hours before use. When fully charged, the headset battery provides approximately 12 hours of talk time or 5 days of standby time.
Getting started Battery charging and connecting base power After installing the battery, charge the headset by placing it in the magnetic charging mount as shown below. The light turns on when the headset is charging. 1. Insert the headset into the magnetic charging mount. 2. The magnet holds the top of the headset in place. The light turns on. Magnetic charging mount 3. Plug the small end of the headset base power adapter into the POWER jack (green dot) at the back of the headset base.
Getting started Headset base and handset lifter installation Installation options You have three installation options: Option 1: Connect the handset lifter to a corded phone (see pages 14-21). This option enables you to answer calls even if you are away from the telephone base. Option 2: Connect the headset to a telephone wall jack (see page 22). This option enables you to use the headset with a single telephone line with or without a telephone. Option 3: Connect the headset to your computer (see page 23).
Getting started Headset base and handset lifter installation Option 1: Connect the handset lifter to a corded phone The handset lifter (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.
Getting started Headset base and handset lifter installation Adjust the corded handset audio 1. Make sure that the CORDED HANDSET CONNECTED switch is set to YES and PHONE mode is selected on the headset base. 2. Lift the corded handset to release the switch hook. Place the corded handset beside the telephone base. 3. Place the headset earpiece on your ear. 4. Press on the headset to listen for a dial tone.
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.
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.
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 17). 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.
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.
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.
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.
Getting started Headset base installation Option 2: Connect the headset to a telephone wall jack You can use your DECT cordless headset for calls through your telephone line with or without a telephone. When you connect your headset base to the telephone wall jack without a telephone, you are unable to make calls. Use the included line splitter to connect the headset base and your telephone to the same telephone wall jack.
Getting started Headset base installation Option 3: Connect the headset to your computer You can use your DECT cordless headset for VoIP (Voice over IP) calls through your computer. You can use any software program that supports VoIP (such as Skype or Google Talk) to make and answer calls. Connect the headset base to your computer using the USB cable as shown below. Wait for your operating system to indicate that it has recognized the headset (a sound or a pop-up window).
Getting started Add and register headsets • The TL7912 supports up to two cordless headsets. The headset provided with your TL7912 is already registered. You can add a new headset (TL7900, purchased separately) to the headset base. You must register a new headset with the headset base before use (see page 26). -OR• You can register a maximum of two headsets (TL7900/TL7912) to an AT&T DECT 6.0 telephone. The telephone base recognizes and counts a headset the same as a handset.
Getting started Add and register headsets For SynapseTM users Refer to the “Synapse Installation Guide” for instructions on installation, registration, and deregistration, and the “Synapse User’s Guide” for how to use the headset with the Synapse system. These manuals are available for free viewing and download at http://www.telephones.att.com/SynapseGuides.
Getting started Add and register headsets Register a headset to the headset base 1. Make sure the battery is properly installed in the headset (see page 11). The light flashes slowly in red and blue to indicate the headset is not registered. 2. Place the headset in the headset base and allow it to charge for at least one hour before beginning registration. 3. Remove the headset from the headset base. 4.
Getting started Add and register headsets Register a headset to an AT&T DECT cordless telephone base 1. You must deregister the headset from its headset base (see page 28). 2. Make sure the battery is properly installed in the headset (see page 11). The light on the headset flashes slowly in red and blue to indicate the headset is not registered. 3. Place the headset in the headset base and allow it to charge for at least one hour before beginning registration. 4. Remove the headset from the headset base.
Getting started Replace a headset You may need to deregister your headsets if: You wish to register your headset to an AT&T DECT telephone or a different headset base. -ORYou 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 the headset base 1.
Getting started Replace a headset Deregister all headsets from an AT&T DECT cordless telephone base 1. Press and hold /HANDSET LOCATOR on the telephone base for about 10 seconds until the IN USE light starts to flash, then release the button. 2. Immediately press /HANDSET LOCATOR again. You must press /HANDSET LOCATOR while the IN USE light is still flashing. (The light flashes for about five seconds.) It takes about 10 seconds to complete the deregistration process.
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 two seconds. The light flashes red three times and you hear three beeps when it is being powered off.
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: 1.
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. Headset ringer The headset base and headset do not have external ringers. When you receive calls, the headset earpiece rings.
Operation PHONE mode Temporary ringer silencing Press MUTE/FLASH to temporarily silence the ringer in the headset 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/FLASH on one headset only silences the ringer of that headset.
Operation PC mode To make and receive calls through your computer, connect the headset base to your computer using the USB cable (see page 23). Turn on PC mode In idle mode, press the PC button on the headset base to use your headset and your computer for VoIP calls. The PC light turns on. Configure your audio settings Configure the audio settings in your VoIP software to use your "AT&T DECT Headset".
Operation Options while on calls Volume control To adjust the listening volume: on the headset to adjust • While on a call, press VOL+ or VOL- ������������������������� the listening volume. • If you are on a VoIP call, you can also adjust the listening volume in your computer audio settings and your VoIP calling software. To adjust the speaking volume: MICROPHONE on the side of • While on a call, press VOLUME /����������� the headset base to adjust the speaking volume.
Operation Options while on calls Mute The mute function allows you to turn off the headset microphone. You can hear the caller, but the caller cannot hear you. To mute a call: • Press MUTE/FLASH 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/FLASH on the headset to resume the two-way conversation and you hear the voice prompt "Mute off".
Operation Options while on calls Switch 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. The light on the headset base of the selected mode flashes twice every three seconds. 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.
Operation Intercom When you have registered your headset to an AT&T DECT cordless telephone, follow the instructions in your telephone user’s manual for intercom calls. Answer an intercom call Press on the headset to answer an intercom call. Answer an incoming call during an intercom call When you receive an incoming outside call during an intercom call, you hear two low beeps. • Press on the headset to end the intercom call. The headset rings after a two-second pause.
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.
Appendix Troubleshooting • Make sure that the CORDED HANDSET CONNECTED switch is set properly (page 13). • 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.
Appendix Troubleshooting 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 30). Allow up to one minute for the cordless headset and headset base to reset. • Reset the headset base.
Appendix Troubleshooting • 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.
Appendix Troubleshooting • 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).
Appendix Troubleshooting 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 Google Talk).
Appendix Troubleshooting For Windows Vista: 1. Go to the “Start” menu and choose “Control Panel”. 2. If you are not already in "Classic View" mode, click on “Switch to Classic View”. In "Classic View", click on “Sounds”. 3. Click on the “Playback” tab and select your computer speakers. 4. Click on the “Properties” button to open the “Speakers Properties” window. Click on the “Levels” tab and adjust the volume slider as necessary. Make sure the computer speakers are not muted. 5.
Appendix Troubleshooting For Mac OSX: 1. Go to the “Apple Menu” and choose “System Preferences”, and then click on “Sound”. 2. Click on the “Output” tab and select your computer speakers as the “Sound Output” device, and then adjust the “Output volume” slider to the desired level. Make sure the “Mute” box is unchecked. 3. Click on the “Input” tab and select your microphone as the “Sound Input” device, and then adjust the “Input volume” slider to the desired level. 4. Close the window when done.
Appendix Troubleshooting 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.
Appendix Troubleshooting 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.
Appendix Troubleshooting • 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. 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.
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 21 to adjust the sensitivity level.
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.
Appendix Important safety information • If this product does not operate normally, see the Troubleshooting section on pages 39-50 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 61-64. 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.
Appendix Important safety information • 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.
Appendix Important safety information • 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.
Appendix Maintenance Taking care of your headset and handset lifter • Your cordless headset and handset lifter contain sophisticated electronic parts, so it must be treated with care. • Avoid rough treatment. • Place the headset and the handset lifter down gently. Save the original packing materials to protect your headset if you ever need to ship it. Avoid water • Your headset or handset lifter can be damaged if it gets wet.
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.
Appendix FCC Part 68 and ACTA 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.
Appendix FCC Part 68 and ACTA 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.
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.
Appendix FCC Part 15 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.
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.
Appendix Limited warranty 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.
Appendix Limited warranty • PRODUCT returned without a valid proof of purchase (see item 6 below); -or• Charges 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.
Appendix Limited warranty a. Include a “valid proof of purchase” (sales receipt) identifying the PRODUCT purchased (PRODUCT model) and the date of purchase or receipt; and b. Provide your name, complete and correct mailing address, and telephone 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.
Appendix Technical specifications RF frequency band 1921.536MHz - 1928.448MHz Channels 5 Operating temperature 32°F - 122°F 0°C - 50°C Headset base voltage (AC voltage, 60Hz) 96Vrms - 127Vrms Headset base voltage (AC adapter output) 6VDC @300mA 7VDC @300mA Headset voltage 3.2VDC - 4.2VDC Replacement battery 3.7V 240mAH DECT 6.0 digital technology The AT&T DECT 6.0 products offer unsurpassed range performance and sound clarity.
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