AASTRA 4223 Professional for BusinessPhone User Guide - Manual (Page 106)

Settings
BusinessPhone — Dialog 4223 Professional / Dialog 3213 106
Ringing signal
By programming, you can adjust ringing type (2 types), ringing
volume (10 steps) and ringing character (10 characters).
prog
Press (see display).
ringing
Press (see display).
You can now select ringing type, volume or character.
Ringing type
Select type 1 if you want to set the ringing volume at a constant
level, select type 2 if you want gradually increasing volume when
the phone rings.
type
Press (see display).
You will hear the selected type.
next
Press to change (see display).
í
Press to finish the procedure.
Note: When type 2 is selected, the programming of the
ringing volume is not applicable.
Ringing volume
volume
Press (see display).
You will hear the selected volume (0...lowest volume, 9...highest).
lower
Press lower or higher to change the level (see display).
í
Press to finish the procedure.
Note: This programming is not applicable when you have
selected ringing type 2.
12 May 10:35 +15°
PHONE PROGRAMMING
key short-no. diversion ringing