Toyota 2015 Sienna Manual page 401

Casual speech recognization
Due to natural language speech recognition technology, this system
enables recognition of a command when spoken naturally. However,
the system cannot recognize every variation of each command.
In some situations, it is possible to omit the command for the proce-
dure and directly state the desired operation.
Not all voice commands are displayed in the short cut menu.
This function is available in English, Spanish and French.
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Expression examples for each function
Command
"Call <name>
<type>"
"Dial <number>"
SIENNA_OM_01999-08001_(U)
5-11. Using the voice command system
Expression examples
Get me <Robert Brown>.
Call <contacts> <phonetypes>.
Call <3334445555>.
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