User`s manual

Appendix

Deregistering headsets

You may need to deregister your headsets if:

You wish to register your headset to a different headset base.

-OR-

You 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 your TL7910 headset base

Press and hold the PAIR button on the headset

base (at least 10 seconds) until the MUTE light

on the headset base turns on and starts to

flash, then release the PAIR button.

Immediately press and release the PAIR

button again. You must press the PAIR button

while the MUTE light is still flashing. (The light

flashes for about seven seconds. If the light stops flashing,

start again with Step 1 above.)

It takes about 10 seconds to complete the deregistration

process. The light flashes slowly in red and blue when the

deregistration process is successful.

3. To register the headset(s) to the headset base again, follow the

registration instructions on page 35.

NOTES:

You cannot deregister the headset(s) if any system headset is in use.

Even if the battery is depleted, you can still deregister the headset by

following the steps above.

To deregister all headsets from an AT&T DECT cordless telephone base, see

the user’s manual of your cordless telephone system, or visit our website at

www.telephones.att.com/manuals.

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