## Voice Gateway Nodes Help

Voice Gateway Nodes help you build a voice AI Agent using [Voice Gateway configuration](https://docs.cognigy.com/voice-gateway/overview).

### Nodes

- [**Call Recording**](https://docs.cognigy.com/ai/agents/develop/node-reference/voice/voice-gateway/call-recording): The Call Recording Node starts or stops a conversation recording.
- [**DTMF**](https://docs.cognigy.com/ai/agents/develop/node-reference/voice/voice-gateway/dtmf): The DTMF Node plays DTMF digits to the caller.
- [**Hang Up**](https://docs.cognigy.com/ai/agents/develop/node-reference/voice/voice-gateway/hangup): The Hang Up Node instructs Voice Gateway to end the call.
- [**Mute Speech Input**](https://docs.cognigy.com/ai/agents/develop/node-reference/voice/voice-gateway/mute-speech-input): The Mute Speech Input Node controls when speech and DTMF user inputs are collected in your Flow.
- [**Play**](https://docs.cognigy.com/ai/agents/develop/node-reference/voice/voice-gateway/play): The Play Node lets you stream a sound file into the call, also in a loop. The Node supports encoded MP3 and WAV files.
- [**Send Metadata**](https://docs.cognigy.com/ai/agents/develop/node-reference/voice/voice-gateway/send-metadata): The Send Metadata Node sends metadata via SIP INFO messages to the connected SIP trunk.
- [**Set Session Config**](https://docs.cognigy.com/ai/agents/develop/node-reference/voice/voice-gateway/set-session-config): The Set Session Config Node configures the Voice Gateway session. This configuration applies for the rest of the session unless overwritten, either directly or by activity parameters.
- [**Transfer**](https://docs.cognigy.com/ai/agents/develop/node-reference/voice/voice-gateway/transfer): The Transfer Node lets you transfer an ongoing call to a Tel or SIP target.

### Footnotes
1. This Node can be configured with [Parameter Details](https://docs.cognigy.com/ai/agents/develop/node-reference/voice/voice-gateway/parameter-details). [↩](https://docs.cognigy.com/ai/agents/develop/node-reference/voice/voice-gateway/overview#user-content-fnref-1)

Last modified on April 21, 2026.