AT&T CL84109 - Manual (Page 72)

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Appendix C
Expansion handset
Your new AT&T CL84109/CL84209/CL84309 telephone system can
accommodate up to 12 handsets. You can add new handsets (AT&T CL80109,
available separately) to your telephone system, you must register each device
with the telephone base before use. To register a new handset, see page 67.
The handset with the CL84109 comes as
HANDSET. You can register up to 11
additional handsets to the telephone base, and the handset numbers are in
numerical order (
HANDSET 2, HANDSET 3, HANDSET 4 and so on).
The handsets that come with the CL84209 are HANDSET 1, HANDSET 2. You
can register up to 10 additional handsets to the telephone base, and they are
assigned numbers in sequential order (
HANDSET 3, HANDSET 4, HANDSET 5
and so on).
The handsets that come with the CL84309 are
HANDSET 1, HANDSET 2 and
HANDSET 3. You can register up to nine additional handsets to the telephone
base, and they are assigned numbers in sequential order (
HANDSET 4,
HANDSET 5, HANDSET 6 and so on).