Nokia 232N Owner's Manual page 71

Volume (earpiece or handsfree speaker), keypad
tones and ringing volume:
Independent levels for each of these functions will be
stored for handset mode and for handsfree mode.
For example, if you are in handset mode when you
select any of these levels, the level will apply only
when the phone is operating in handset mode.
Equally, if you are in handsfree mode when you select
any of these levels, the level will apply only when the
phone is operating in handsfree mode.
Functions which can be available with the
Complete Handsfree Car Kit:
Ignition Sense
This function (ignition-controlled switch on/off) allows
the phone to be switched on and off automatically
whenever the vehicle is started or switched off,
respectively.
When the ignition is switched off, the message
AUTO PWR OFF is displayed, a tone is heard, and
the phone is switched off automatically after
5 seconds. If you press any key or if you take the
phone from the Mobile Holder during this time, the
phone will not be switched off.
If you turn off the ignition while you have a call in
progress, the phone is switched off automatically
5 seconds after you end the call.
The Ignition Sense function is not user-selectable.
It is always enabled when the ignition sense line is
connected.
Car Radio Mute
This function mutes the car radio when a call is started
or when the phone rings to indicate an incoming call.
When the call or the ringing tone ends, the car radio is
unmuted and regains its original volume level.
The Car Radio Mute function is not user-selectable.
It is always enabled when the mute line is connected.
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