Registration and deregistration
Deregistering handsets
You may need to deregister your handsets if:
•You have 12 registered handsets and need to replace a handset.
•You wish to change the designated handset number of your registered handsets.
You must first deregister ALL the handsets, and then register each handset you wish to use again, one at a time.
Please read carefully through all the instructions on this page before beginning the deregistration process.
Deregister all handsets from your telephone base
1.Press and hold 
/HANDSET LOCATOR on the telephone base until the IN USE light starts to
flash (about 10 seconds), then release the 
/HANDSET LOCATOR button.
2. Immediately press 
/HANDSET LOCATOR again
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 1 above.)
3.It takes up to 10 seconds to complete deregistration. Wait for the cordless handset screen to display Put HS on BASE to register.
4.To register the handset(s) to the telephone base again, follow the instructions on page 8.
After you deregister the handset(s), the system’s date and time need to be reset. For instructions, see Set date/time in the telephone system user’s manual for details. To skip setting the date and time, press 
OFF/CANCEL.
NOTES:
•If the deregistration process is not successful, you might need to reset the system and try again. To reset, unplug the power from the telephone base and plug it back in.
•You cannot deregister the handset(s) if any other system handset is in use.
•Even if the battery is depleted, you can still deregister the handset by following the steps above. After the handset is charged for at least 10 minutes, the screen shows Put HS on BASE to register.