AT&T TL77008 user manual Replacing a handset, You may need to de-register your handsets if

Getting started

Replacing a handset

You may need to de-register your handsets if:

You have the maximum number of registered handsets (four) and need to replace a handset.

-OR-

You wish to change the designated handset number of your registered handsets.

You must first de-register ALL the handsets, and then re-register ALL the handsets you wish to use.

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

To de-register all handsets

1.Press and hold HANDSET LOCATOR on the telephone base

for about 10 seconds (until the IN USE light turns on and starts to flash), then release the HANDSET LOCATOR button.

2.Immediately press and release HANDSET LOCATOR again. You must press HANDSET LOCATOR while the IN USE light is still flashing. (The light flashes about seven seconds. If the light stops flashing, pick up the handset and place back into the telephone base, then start again step number one.)

3.The handset(s) will show CONNECTING... and it will take about 10 seconds to complete de-registration. ALL handsets will show NOT REGISTERED if de-registration was successful.

NOT REGISTERED