Appendix
Adding and registering handsets
Your telephone can support up to 12 cordless handsets (AT&T model CL80100, sold separately). The handset needs to register with the telephone base before use. You must register each handset separately.
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 (HANDSET 2 to HANDSET 12).
When first purchased, all expansion handsets alternately show 1.Press HS LOC on base 4sec and 2.Then press # on handset on the screen. The new handset should be charged without interruption for at least 30 minutes before registering it to the telephone base.
To register a handset to your telephone base
1.Press HS LOC on base 4sec
2.Then press # on handset
1.Make sure the handset is out of the telephone base or charger and alternately shows 1.Press HS LOC on base 4sec and 2.Then press # on handset before you begin registration.
2.Press and hold /HANDSET LOCATOR on the telephone base for about four seconds (until the red IN USE light on the telephone base is on) and then release the button.
3.Press # (pound key) on the handset. The screen shows Registering... Please wait. It takes up to 60 seconds to complete registration. Then HANDSET X Registered appears on the screen, with X being the handset number
Registering...
Please wait
HANDSET X
Registered
If registration is not successful, Registration failed appears on the screen. Please start again from steps one above.
NOTE: You cannot register a handset if any other system handset is in use.
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