Nokia 9290 User Manual page 277

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Ignition sense
The ignition sense feature allows the communicator to be automatically switched
on or off whenever the communicator is in the charging holder and the vehicle is
started or switched off. This prevents the communicator from draining the car
battery, if accidentally left on for a long period of time.
If installed, the ignition sense is always available. If you do not wish to enable the
ignition sense, ask your dealer to leave it uninstalled.
When the ignition is turned off, the message 'Phone will power off, if not used' is
displayed. The communicator will be switched off after 15 seconds unless you press
any key or take the communicator from the holder during this time.
Car mute
This feature mutes the car radio during a phone call, if supported by the car radio.
Ask your dealer to enable the car radio feature during installation.
Antenna motor control
If installed, this feature will activate the electrical motor of the mobile antenna.