Toyota Avalon 2008 Quick Reference Manual page 260

The following operations can be performed:
Dialing: Press
or .
Storing the number in the phone book: Select "Store" by using a
voice command or
Deleting: Select "Delete" by using a voice command or
Call history
n
Up to 5 numbers can be stored in each of the outgoing and incoming history
memories.
When talking on the phone
n
Do not talk simultaneously with the other party.
l
Keep the volume of the receiving voice down. Otherwise, voice echo will
l
increase.
3-3. Using the hands-free system (for cellular phone)
or select "Dial" by using a voice command
.
.
3
235