AASTRA DT4x2 for MX-ONE User Guide EN - Manual (Page 114)

Audible Adjustments
DT412/DT422/DT432 114
Ring signals
ç
Press.
The last used tab is marked. à
or
á
Select Settings. ã
Press to enter Settings.
A list with all available settings is shown. á
Select Alert signals. ã
Select Ring signals. á
Press. â
or
ã
Select the required call type.
You can change the ring signal for Internal calls, External calls, or
Callback calls. á
Press. â
or
ã
Select the required signal.
Available alternatives are; Beep, Low, Medium, High, and Mixed.
If you want to hear the new signal during the changing:
Play
Press (see display).
The marked ring signal is played until you press
Stop or Select .
Select
Press to select the ring signal (see display).
The selected ring signal is shown.