Philips Fax Machine Overview page 16

For selecting the language of the display and the reports,
press MENU and numbers 1 and 1 and press OK.
Select the desired language with uand confirm with
OK.
You can choose between ten different ring signals.
Enter function 44. Press MENU and numbers 4 and 4
and then OK.
Select the desired ring signal with 0 to 9.
Confirm your setting with OK.
You can adjust the volume of the ring signal if the fax machine is
in stand-by mode or if it is just ringing. Please note that different
volumes can be set in S and M mode (see Fax switch).
By pressing u the display shows the current setting for
about three seconds.
Change the volume by pressing u until the desired
volume is achieved.
You can adjust the volume of the loudspeaker at any time by
pressing DIAL (without built-in answering machine) or z
(with built-in answering machine).
By pressing u the display shows the current setting.
If you wish to adjust the displayed value, press u until
the desired volume is achieved.
Finish your entry by pressing STOP.