Toyota 2006 Sienna Owner's Manual page 617

OTHER FUNCTIONS
INFORMATION
In the following conditions, the system
may not function.
D The cellular phone is turned OFF.
D The current position is outside the
communication area.
D The cellular phone is not connected.
D The cellular phone has a low battery.
100
By pushing the telephone switch above,
you can receive a call or hang up without
taking your hands off the steering wheel.
You can use the microphone above when
talking on the phone.
The other party's voice outputs from the driv-
er's speaker. When the received calls or re-
ceived voice outputs, the audio from the Au-
dio system or voice guidance from the
Navigation system will be muted.
INFORMATION
D Talk alternately with the other party on
the phone. If you talk at the same time,
the voice may not reach each other. (It
is not a malfunction.)
D Keep the volume of receiving voice
down. Otherwise, echo is coming up.
When you talk on the phone, speak
clearly towards the microphone.
D In the following situations, your voice
may not reach the other party.
D Driving on unpaved road. (Making
a traffic noise.)
D Driving at the high speed.
D The window is open.
D Turning the air-conditioning vents
towards the microphone.
D The sound of the air-conditioning
fan is loud.