Dial Method - Olympia OL2420 Mode D'emploi

3) Press PROG to enter message menu.
4) Press PROG again to clear the alert or CANCEL to
escape with clearing.

6.12 Dial Method

Your OL2420 is preset for DTMF (Tone) dialing. To
change the setting:
1) Press PROG.
2) Press
DIAL METHOD
3) Press PROG to enter dial method menu.
40
or
eleven times.