Lexus RX 450h 2014 Owner's Manual page 452

Speaking on the phone
The following screen is displayed when speaking on the phone.
■
To adjust the receiver volume
Select "-" or "+". You can also adjust the volume using the steering
switches or the volume knob.
■
To prevent the other party from hearing your voice
Select "Mute".
■
Inputting tones
When using phone services such as an answering service or a bank,
you can store phone numbers and code numbers in the phonebook.
Select "0-9".
STEP 1
STEP 2
3-3. Using the Lexus Display Audio system
Input the number.
3
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