AASTRA 4222 Office for MX-ONE (TSE) User Guide EN - Manual (Page 70)

Settings
Dialog 4220 Lite/Dialog 4222 Office 70
Programming of ring signal tone character
There are 10 different programmable ring signal tone characters on your
phone, each corresponding to a digit between 0 and 9.
Note: If you use melodies to signal incoming calls (4222 Office
phone only), this will replace the tone character. See section
“ Melody Ringing ” on page 73 .
Ô
Program Press.
On the 4222 Office phone, the current tone character is displayed.
(
0
–
9
)
Press the corresponding digit.
The phone rings with the chosen tone character.
Х Ф
Program Press to finish programming.