AASTRA 4225 for MX-ONE Telephony Switch - Manual (Page 123)

123 Dialog 4223 Professional/Dialog 4225 Vision
Accessories
Dialog 4225 Vision:
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Select PhoneSet in the top menu (see display).
Down or Up Press to frame
Option Unit Settings
(see display).
Select Press (see display).
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.
Ô
Line 2 Press to change to busy signal,
or
Х Ф
Line 2 press to change to extra bell & busy signal,
or
Ц Ф
Line 2 press to change to extra bell.
Exit Press to save the setting and exit (see display).
Note: If you do not press
Exit
, the phone automatically returns
to idle about 30 seconds after the last key press.