AT&T EP590-3 User Manual page 10

Adding new handsets
If the screen on the telephone base shows Registration
failed, an error tone will sound. Try again.
FLASH CANCEL
Handset 1
FLASH CANCEL
Handset 4
NOTE: The maximum number of handsets in use at any time is three, and
the possible combinations include:
•
Three handsets and the base on an external call.
•
Two handsets and the base on an external call, and one handset accessing
the answering system.
•
One handset and the base are on an external call, and two handsets are on
intercom.
NOTE: The new handset will be assigned the next available handset number.
A maximum of eight handsets can be registered to each telephone base.
Telephone base
FLASH CANCEL FLASH CANCEL
Handset 5 Handset 6
6
FLASH CANCEL FLASH CANCEL
Handset 2 Handset 3
FLASH CANCEL FLASH CANCEL
Handset 7 Handset 8