Toyota Matrix User Manual page 246

3-4. Using the hands-free phone system (for cellular phone)
Adjusting the ringtone volume when receiving a call
Change the ringtone volume using
To decrease the volume: Turn
To increase the volume: Turn
When talking on the phone
■
● Do not talk simultaneously with the other party.
● Keep the volume of the received voice down. Otherwise, voice echo will
increase.
Automatic volume adjustment
■
When vehicle speed is 50 mph (80 km/h) or more, the volume automatically
increases. The volume returns to the previous volume setting when vehicle
speed drops to 43 mph (70 km/h) or less.
■ Phone call system functions
Depending on the cellular phone, certain functions may not be available.
Situations where the system may not recognize your voice
■
● When driving on a rough road
● When driving at high speeds
● When air is blowing out of the vents onto the microphone
● When the air conditioning fan emits a loud noise
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