AT&T TL7600 user manual Replacing a headset, You may need to de-register your headsets if

De-registration

Replacing a headset

You may need to de-register your headsets if:

You have two registered headsets and need to replace one of them.

-OR-

You wish to change the designated headset number and/or the color of the ON/OFF light of your registered headsets.

You must first de-register both headsets, and then re-register each headset you wish to use.

Please read carefully through all the instructions before beginning the de-registration process.

To de-register all headsets from the headset base

This procedure de-registers all the items registered to the head- set base.

1.Press and hold PAIR on the headset base until the MUTE light on the headset base turns on and starts to flash (at least 10 seconds), then release the PAIR button.

2.Immediately press and release PAIR again. You must press PAIR while the MUTE light is still flashing. (The light flashes for about seven seconds. If the light stops flashing, start again with step one above.)

3.If de-registration was successful:

•The MUTE light on the headset base turns off.

•The headset(s) ON/OFF light flashes twice every five seconds.

4.To re-register the headset(s) to the headset base, follow the registration instructions on page 6.

25