2009 Toyota Sienna Owners Manual - Page 370
2009 Toyota Sienna Manual
Page 370 highlights
3-4. Using the hands-free phone system (for cellular phone) n Call history Up to 5 phone numbers can be stored in each of the outgoing and incoming call history memories. n When talking on the phone l Do not talk simultaneously with the other party. l Keep the volume of the received voice down. Otherwise, voice echo will increase. 344