AT&T CL80109 - Manual (Page 14)

10
Adding the handset to your telephone base
De-registering a handset
You can de-register handsets. You may need to de-register your
handsets if:
You have twelve registered handsets 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
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 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) shows CONNECTING... and it takes about 10
seconds to complete the de-registration process. ALL handsets
shows
NOT REGISTERED when de-registration is 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 is not successful, you might need to reset the
system and try again. To reset: pick up the handset and press the
PHONE/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.