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BusinessPhone – Dialog 4223 Professional / Dialog 3213112
Option unit
Dialog 4223 Professional
The Option unit DBY 420 01/1 is an optional accessory, to be
installed on the bottom of your telephone set. The following devices
can be installed via the Option unit:
• Extra bell or busy indication outside your door
To check or set the option unit for extra bell or for busy signal:
í*1 Press and hold simultaneously until a ring signal is heard.
The display shows:
The Line 2 key lamp indicates the setting of the option unit:
•Off=Extra bell
• On=Busy signal lamp
• Flashing=Combined extra bell & busy lamp.
Line 2
Ô Press to change to busy signal,
Or:
Line 2
ÕÔ Press to change to extra bell & busy signal,
Or:
Line 2
ÖÖÔ Press to change to extra bell.
# Press to save the setting and exit.
Note: If you do not press #, the phone automatically
returns to idle about 30 seconds after the last key press.
OPTION PROGRAMMING