Toyota Corolla 2010 Quick Reference Manual page 244

3-3. Using the hands-free phone system (for cellular phone)
■
Steering wheel
236
Volume
The voice guidance volume
cannot be adjusted by using
this button.
Hands-free phone system
on/starts a call (off-hook
switch)
Hands-free phone system
off/ends a call/refuses a call
(on-hook switch)
Press: Voice command sys-
tem on
Press and hold: Voice com-
mand
switch)
I n f o r ma t i o n P r o v i d e d b y :
system off (talk