VTech DECT6.0 DS6151 - Manual (Page 77)

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Appendix
Replace a handset
If you want to replace a handset or re-assign 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:
Remove any handset from the telephone base. Press and hold HOLD on
the telephone base for about 10 seconds until the telephone base displays
Deregister all handsets?
Press the
YES softkey.
The deregistration process takes about 10 seconds to complete. All
handsets show Press [HOLD] on base for 4 sec, then press [#] on
handset when the deregistration completes.
If deregistration fails, you may need to reset the telephone and try again.
To reset:
Pick up the registered handset and then press or
.
Press OFF and then place the handset back in the telephone base.
-OR-
Unplug the power adapter from the telephone base, then plug it back in.
1.
2.
3.
1.
2.
1.
You cannot deregister a handset if any system handset or telephone base is
in use.