AT&T DLP73410 - Appendix; Headsets; Register a Handset to Your Telephone Base

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Add and register handsets/headsets
YourtelephonecansupportuptoveDECT6.0cordlesshandsets(AT&T
model DLP70110, sold separately) and cordless headsets (sold separately). Visit
https://telephones.att.com/accessories for a list of compatible
DECT 6.0 cordless headsets. Each new handset or headset must be registered
to the telephone base before use. You must register each handset or headset
separately.
To register a cordless headset to this telephone system, please refer to the
corresponding user’s manual for more details. To register a cordless handset,
see the following.
The handsets provided within your product box are already registered as
HANDSET 1, and so forth. Additional handsets are assigned numbers in the
sequential order they are registered (up to HANDSET 5).
Register a handset to your telephone base
1. Before you begin registration, make sure the handset is out of the telephone
base or charger and shows To register HS... and ... see manual.
2. Put the handset you wish to register on the telephone base cradle.
3. The telephone base shows Registering... Please wait, and the handset then
shows Registering... If the registration is successful, the handset screen
displays Registered and beeps. The handset is now registered with the
telephone base.
Appendix
For registration, put the handset on the
telephone base, not the handset charger.