Conceptual Guides

• Call Flow: The various stages of a call and how they interact.
• Numbers: Numbers are a key part of using the Vonage Voice API. This guide covers number formatting, outgoing caller IDs and incoming call numbers.
• Endpoints: When connecting a call, you can connect to another phone number, a sip endpoint or a websocket. These are known as endpoints.
• Text to Speech: Using our Text-To-Speech engine, you can play machine-generated speech to your callers
• Customizing Spoken Text: Use Speech Synthesis Markup Language (SSML) to control how text-to-speech is read out
• Speech to Text: Capture user input by converting user speech to text form during a call.
• DTMF: Capture user input by detecting DTMF tones (button presses) during a call.
• Call Recording and Transcription: Recording audio input from a caller or recording the conversation between two callers.
• WebSockets: You can connect the audio of a call to a WebSocket to work with it in real time.
• Advanced Machine Detection: Using our Text-To-Speech engine, you can play machine-generated speech to your callers
• Regions: Recording audio input from a caller or recording the conversation between two callers.
• Fraud Prevention: Protect your Voice API applications from fraud
• Programmable SIP: Learn how to integrate your existing SIP Infrastructure with the Vonage Communications Platform.
• Troubleshooting: A few things to look for if you are experiencing problems with the Voice API.