Deregister Handsets; Deregister All Handsets From Your Telephone Base - AT&T DLP70090 User Manual

Registration and deregistration

Deregister handsets

You may need to deregister your handsets if:
You have five registered handsets and need to replace a handset.
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-OR-
You wish to change the designated handset number of your
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registered handsets.
You must first deregister ALL 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

In addition to the cordless handsets, this operation will also
deregister all cordless headsets registered to your telephone base.
1. Make sure that all handsets are out of the telephone base and
chargers before you begin deregistration.
2. Press and hold FIND HS on the telephone base for about 10
seconds (until the screen shows Deregister all devices?).
Release /FIND HS.
3. Immediately press FIND HS again. The telephone base shows
Deregistered all devices, and you hear a confirmation tone.
4. It takes up to 10 seconds to complete the deregistration process.
Before registering the handset again, wait for the cordless
handset screen to display To register HS... and ...see manual
alternately.
5. After deregistering, register each handset again individually
following the registration instructions on the pages 13-14.
Notes:
If the deregistration fails, you may need to reset the system and try again. To reset, unplug the power
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from the telephone base and plug it back in.
You cannot deregister the handset(s) if any other system handset is in use.
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Even if the battery is depleted, you can still deregister the handset by following the steps mentioned
f
above. After the handset is charged for at least 10 minutes, the screen shows To register... and ...see
manual alternately.
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