The DTMF app places an outbound call that requests keypad (DTMF) input, for example for confirmations or numeric entry. It plays a prompt, validates entered digits against rules, and returns the captured digits via a callback.
Voice DTMF call scenario
Prompts for Voice DTMF can use Text-to-Speech (TTS). This can be plain text TTS or using SSML. Custom audio files are also supported. More information on the different types of prompts can be found at the Voice API prompts page. Mixing different types of prompts is possible. For instance, the main prompt can use TTS prompts, while the valid/invalid prompt can use custom audio files.
Webhook callbacks are available for Voice DTMF. For more information, visit the Voice API callbacks page.
Guides & API references
Use below links to get additional information to: