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About your 4145Ex/
4146Ex handset
Message indicator light
Flashes when you have a
message waiting.
Volume control
Adjusts the handset and ringer
volume.
Display
Shows call information, handset
status icons, and guides you
through features and option
menus.
Headset connector
H
D
D
E
B
J
C
C
J
A
L
K
J
I
H
G
F
A
B
C
D