AT&T TL86109 - Manual (Page 140)

134
Appendix
Replace a handset
If you want to replace a handset or reassign the designated handset number
of a registered handset, you must deregister all the handsets and then
individually register each handset.
To make deregistration easier, read all of the instructions on this page before
you begin.
To deregister all handsets:
Press and hold FLASH on the telephone base for about 4 seconds until it
shows Deregister all handsets?
Press the Yes softkey to continue. You hear a confirmation tone from the
telephone base.
The telephone base displays
PLEASE WAIT... All system handsets show
Out of range OR no power at base for a few seconds, and then you hear a
confirmation tone from the handset.
All the handsets show
Press [HOLD] on base for 4 sec, then
press [#] on handset when the deregistration is completed. The
deregistration process takes about 10 seconds to complete.
If deregistration fails, you may need to reset the telephone and try again.
To reset:
Unplug the power from the telephone base, then plug it back in.
After deregistering, register each handset individually. See Add and register
a handset on page 133.
NOTES:
You cannot deregister the handset(s) if any other system handset is in use.
During deregistration, your DECT 6.0 headset(s) will also be deregistered.
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