Deregistering Handsets - AT&T EL52115 User Manual

Appendix

Deregistering 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, and then register each handset individually.
To make deregistration easier, read all of the instructions on this page before
you begin.
Deregister all handsets from the telephone base
In addition to the cordless handsets, this operation will also deregister all
cordless headsets and speakerphones registered to your telephone base.
1. Press and hold
seconds until the
to flash. Then, release
2. Immediately press
flashes for approximately five seconds.
3. The deregistration takes about 10 seconds to complete. All handsets
display To register HS... and ...see manual alternately, if the deregistration
was successful.
To register the handset(s) to the telephone base again, follow the
registration instructions on the previous page.
NOTES:
• If the 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.
• You cannot deregister the handsets if any other system handset is in use.
• Even if the battery is depleted, you can still deregister the handsets by following the steps
mentioned above. After the handset is charged for at least ten minutes, the screen shows
To register HS... and ...see manual, alternately.
on the telephone base for about 10
light on the telephone base turns on and starts
while the
72
.
again. You must press
light is still flashing. The light