DTMFInputEvent - Amazon Lex API Reference


A DTMF character sent from the client application. DTMF characters are typically sent from a phone keypad to represent numbers. For example, you can have Amazon Lex V2 process a credit card number input from a phone.



The DTMF character that the user pressed. The allowed characters are A - D, 0 - 9, # and *.

Type: String

Length Constraints: Fixed length of 1.

Pattern: ^[A-D0-9#*]{1}$

Required: Yes


A timestamp set by the client of the date and time that the event was sent to Amazon Lex V2.

Type: Long

Required: No


A unique identifier that your application assigns to the event. You can use this to identify events in logs.

Type: String

Length Constraints: Minimum length of 2. Maximum length of 100.

Pattern: [0-9a-zA-Z._:-]+

Required: No

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: