Ericsson DIALOG 4220 - Manual (Page 87)

87 Dialog 4220 Lite/Dialog 4222 Office
Accessories
Option unit (optional)
(Dialog 4222 Office phone only).
The option unit DBY 420 01/1 is an optional accessory to be
installed under your telephone set. The unit is used to connect
either an extra bell outside your room, or a busy signal lamp
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
OPTION PROGRAMMING
and 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
Х Ф
press to change to extra bell & busy signal,
or
Line 2
Ц Ф
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.