If you still have access to the old base you can de-register the handset by following a simple process. You will have to de-register all handsets registered to that base.
- Make sure that all handsets are out of the telephone
base and chargers before you begin deregistration.
- 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.
- Immediately press /HANDSET LOCATOR while the
IN USE light is still flashing. (The light flashes for about
seven seconds. If the light stops flashing, start again with Step 1.)
- It takes up to 10 seconds to complete the deregistration process. Wait