VTech DS6522-3-32-4 Manual - Manual (Page 71)

Appendix
67
Deregister handsets
If you want to replace a handset, or reassign the designated handset number of
a registered handset, you must deregister all handsets that are registered to the
telephone base. Then register each handset individually.
To make deregistration easier, read all of the instructions on this page before
you begin.
To deregister all handsets:
Press and hold /FIND HANDSET on the telephone base for about 10 seconds
until the IN USE light flashes.
Immediately press /FIND HANDSET again. You must press /FIND HANDSET
while the IN USE light is still flashing. The IN USE light flashes for about
five seconds.
The deregistration process takes about 10 seconds to complete. All handsets
alternately show To register HS... and ...see manual.
To register the handset(s) to the telephone base again, follow the registration
instructions on the previous page.
You cannot deregister all handsets if any other system handset is in use.
If deregistration fails, you may need to reset the system and try again. To reset,
unplug the power from the telephone base and plug it back in.
Even if the battery is depleted, you can still deregister all handsets by following
the steps above. After the handset is charged for at least 10 minutes, the handset
alternately shows To register HS... and ...see manual.
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