Att TL90078 User Manual download pdf (Page 14)

Getting started

Replacing a handset

You may need to de-register your handsets if:

You have twelve registered handsets and need to replace a unit.

-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

each handset 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 for about seven seconds. If

the light stops flashing, pick up the handset and place it back

into the telephone base, then start again with step one above.)

3. The handset(s) will show SEARCHING FOR BASE and it will

take about 10 seconds to complete the de-registration process.

ALL handsets will show NOT REGISTERED if de-registration

was successful.

4. To re-register the handset(s) to the telephone base, follow the

registration instructions on page 9.

NOTES:

1. If the de-registration process was not successful, you may need to reset the

system and try again. To reset: pick up the handset and press the HOME/FLASH

button, then press the OFF/CLEAR button and place the handset back into the

telephone base. You may also reset by unplugging the power from the telephone

base and plugging it back in.

2. You cannot de-register the handset(s) if any other system handset is in use.

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Att TL90078 User Manual Page 14