Twist and pull the headset until it separates from the ring of the neckband. Operation 17 Headset operation Making a call If you registered the expansion headset to a headset base, see the user’s manual for your headset base model TL7610/TL7611/ TL7650/TL7651 for additional instructions. Visit to view or download the user manuals. If you registered the expansion headset to an AT&T DECT cordless telephone: Follow the instructions in your telephone user’s manual for making calls. To switch to the headset, press ON/OFF on the headset at any time. After you switch the call to the headset.........., you can hang up the telephone and continue the call on the headset. Operation 18 Headset operation Answering a call on the headset Press ON/OFF on the headset. Ending a call on the headset Press ON/OFF on the headset. Auto off A call ends automatically when you put the headset in the headset charger. NOTE: The headset does not have an external ringer. When you receive calls, the headset earpiece plays a ring tone. Headset operation Temporary ring tone silencing Press MUTE/FLASH to temporarily silence the ring tone in the headset earpiece. This silences the ring tone 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 headsets receive the ring tone when there is an incoming call. Pressing MUTE/FLASH on one headset will only silence the ring tone of that particular headset. Intercom and intercom call transfer If you have registered your headset to an AT&T DECT cordless telephone, follow the instructions in your telephone user’s manual for intercom and intercom call transfer. When the cordless handset prompts you to enter a handset number: If you have one registered handset, press # on the cordless handset. If you have two registered handsets, press #1 for headset 1 and #2 for headset 2. NOTE: You can only intercom or intercom call transfer from an AT&T DECT cordless handset to the DECT cordless headset. Options while on calls Volume control To adjust the listening volume: While on a call, press the VOLUME + – keys on the side of the headset to adjust the listening volume. NOTE: When the volume reaches the minimum or maximum setting, you hear three quick beeps. Call waiting If you subscribe to call waiting service offered by your telephone service provider, you hear a beep if there is an incoming call while you are already on a call. If you have registered the TL7600 to a headset base and chosen installation option 3 from the TL7610/TL7611/TL7650/TL7651 user’s manual, you must answer call waiting using the corded telephone base (see your telephone user’s manual for instructions). For all other installations, press and hold MUTE/FLASH on the side of the headset to put your current call on hold and answer the new call. You can press and hold MUTE/FLASH at any time to switch back and forth between calls. VOLUME + – MUTE/FLASH Options while on calls Switching a call between handset and headset If you have registered the TL7600 to a TL7610/TL7611/TL7650/TL7651 headset base that is plugged into the telephone wall jack (installation option 1 or 2): To switch from the corded handset to a headset while on a call, press ON/OFF on the headset, then place the corded handset back into the telephone base. To switch from a headset to the corded handset while on call, lift the corded handset from the telephone base, then press ON/OFF on the headset. To switch from a cordless handset to a headset while on a call, press ON/OFF on the headset, then hang up the cordless handset. To switch from a headset to a cordless handset while on a call, press the button you use to answer a call, then press ON/OFF on the headset. If you have registered the TL7600 to a TL7610/ TL7611/TL7650/TL7651 headset base that is connected to a multiple line ....................or digital business corded telephone (installation option 3): To switch between a headset and the corded handset while on a call, press ON/OFF on the headset. NOTE: For information about installation options 1, 2, and 3, see the user’s manual for your headset base model TL7610/ TL7611/TL7650/TL7651. Visit to view or download the user manuals. Options while on calls Multiple headset/handset use Headset(s) and handset(s) on the same phone line can join an external call in progress. The number of headset(s) and handset(s) that can join may be limited by your telephone system. See your telephone user’s manual for more information. Join a call with a headset by pressing ON/OFF on the headset. To hang up, press ON/OFF or place the headset in the headset charger. Mute The mute function allows you to turn off the headset microphone. You can hear the caller, but the caller is not able to hear you. To mute the call: • Press MUTE/FLASH on the headset to turn off the headset microphone. When mute is on, there is a short beep every 15 seconds u...