Getting started
Expansion handset
Your new AT&T TL92278/TL92328/TL92378 telephone system can accommodate up to 12 handsets. You can add new handsets (AT&T TL90078, purchased separately) to your telephone system, but each device must be registered with the telephone base before use. To register a new handset, see page 15.
The handsets provided with the TL92278 come pre-registered as HANDSET 1 and HANDSET 2. You can register up to 10 additional handsets to the telephone base, and they will be assigned numbers in the order they are registered (HANDSET 3, HANDSET 4, HANDSET 5 and so on).
The handsets provided with the TL92328/TL92378 come pre-registered as HANDSET 1, HANDSET 2 and HANDSET 3. You can register up to nine additional handsets to the telephone base, and they will be assigned numbers in the order they are registered (HANDSET 4, HANDSET 5, HANDSET 6 and so on).
