Lexus 2003 LS Owner's Manual page 480

Call Screen Controls
The Call screen has four individual selections that can be con-
trolled from either the console display or through the command
module.
They are as follows:
1. Volume Up
2. Volume Down
3. Microphone Mute Switch
4. Hook Key / End Call
5. Sending of Tone Signals
Sending of tone signals can be operated only from the console
display.
Section 3 Using the Lexus Integrated Mobile Phone
System in Vehicles equipped with Navi-
42
gation
INFORMATION