AT&T TL90078 - Manual (Page 13)

Getting started
Adding and registering handsets
9
HANDSET X
REGISTERED
When first purchased, all expansion handsets
will show
NOT REGISTERED on the screen.
The new handset(s) may need to be charged
for five minutes before registering to the
telephone base.
To register a handset to your telephone
base
1. Place the unregistered handset into the
telephone base. If PRESS HNDST LOC
4 SEC ON BASE does not appear on
the handset screen after a few seconds,
remove the handset and place it in the
telephone base again.
2. On the telephone base, press and hold
HANDSET LOCATOR for about four
seconds (until the red IN USE light on
the telephone base turns on) and then
release the button. The handset will show
PLEASE WAIT... and it will take about
10 seconds to complete the registration.
The handset will display
HANDSET X
REGISTERED, with X being the handset
number (1-12). There will be a beep
sound if the registration is successful.
NOTES:
1. If the registration is not successful, the display
will show NOT REGISTERED. To reset the handset,
remove the handset from the telephone base and
place it back in. Try the registration process again.
2. You cannot register a handset if any other system
handset is in use.
PRESS HNDST LOC
4 SEC ON BASE
PLEASE WAIT...
NOT REGISTERED