> For a complete documentation index, fetch https://docs.voximplant.ai/llms.txt

# Ultravox Realtime

## Docs

- [Overview](https://docs.voximplant.ai/voice-ai-orchestration/ultravox/overview.md): Ultravox in VoxEngine
- [Example: Answering an incoming call](https://docs.voximplant.ai/voice-ai-orchestration/ultravox/inbound.md): This example answers an inbound Voximplant call and bridges audio to Ultravox’s WebSocket API for real‑time speech‑to‑speech conversations.
- [Example: Placing an outbound call](https://docs.voximplant.ai/voice-ai-orchestration/ultravox/outbound.md): This example starts a VoxEngine session, places an outbound PSTN call, and bridges audio to Ultravox after the callee answers.
- [Example: Function calling](https://docs.voximplant.ai/voice-ai-orchestration/ultravox/function-calling.md): This example answers an inbound call, connects it to Ultravox, and handles **client tool invocations** via Ultravox data messages.