# Feature Overview

## Voice Selection

| Voice Selection                                                                          |
| ---------------------------------------------------------------------------------------- |
| [Deepgram TTS Voice Models](/guides/aura-tts-models)                                     |
| [Third Party TTS Voice Models](/guides/self-hosted-deployments-3-voice-agent-tts-models) |

## Supported LLM Models

| Models                                                                 |
| ---------------------------------------------------------------------- |
| [LLM Models](/guides/self-hosted-deployments-3-voice-agent-llm-models) |

## Conversation Context

| Feature                                                                               |
| ------------------------------------------------------------------------------------- |
| [Agent Context](/guides/self-hosted-deployments-3-configure-voice-agent#agentcontext) |

## Inputs: Client Messages

| Feature                                                                                    |
| ------------------------------------------------------------------------------------------ |
| [Settings](/guides/self-hosted-deployments-3-voice-agent-settings)                         |
| [Update Speak](/guides/self-hosted-deployments-3-voice-agent-update-speak)                 |
| [Update Think](/guides/self-hosted-deployments-3-voice-agent-update-think)                 |
| [Update Prompt](/guides/self-hosted-deployments-3-voice-agent-update-prompt)               |
| [Inject Agent Message](/guides/self-hosted-deployments-3-voice-agent-inject-agent-message) |
| [Inject User](/guides/self-hosted-deployments-3-voice-agent-inject-user-message)           |
| [Force End Turn](/guides/self-hosted-deployments-3-voice-agent-force-end-turn)             |
| [Agent Keep Alive](/guides/self-hosted-deployments-3-agent-keep-alive)                     |

## Outputs: Server Events

| Feature                                                                                                                              |
| ------------------------------------------------------------------------------------------------------------------------------------ |
| [Welcome](/guides/self-hosted-deployments-3-voice-agent-welcome-message)                                                             |
| [Settings Applied](/guides/self-hosted-deployments-3-voice-agent-setting-applied-message)                                            |
| [Conversation Text](/guides/self-hosted-deployments-3-voice-agent-conversation-text)                                                 |
| [User Started Speaking](/guides/self-hosted-deployments-3-voice-agent-user-started-speaking)                                         |
| [Agent Thinking](/guides/self-hosted-deployments-3-voice-agent-agent-thinking)                                                       |
| [Acknowledgements](/guides/self-hosted-deployments-3-voice-agent-acknowledgements) (`PromptUpdated`, `SpeakUpdated`, `ThinkUpdated`) |
| [Agent Audio Done](/guides/self-hosted-deployments-3-voice-agent-agent-audio-done)                                                   |
| [Errors & Warnings](/guides/self-hosted-deployments-3-voice-agent-errors-warnings)                                                   |

## Input / Output Events

| Feature                                                                                        |
| ---------------------------------------------------------------------------------------------- |
| [Function Call Request](/guides/self-hosted-deployments-3-voice-agent-function-call-request)   |
| [Function Call Response](/guides/self-hosted-deployments-3-voice-agent-function-call-response) |

## Session Length

Sessions close automatically after 2 hours. The server warns you 5 minutes ahead with `MAXIMUM_SESSION_LENGTH_APPROACHING` and closes the session with a `MAXIMUM_SESSION_LENGTH_REACHED` error. To keep a conversation going, start a new session and replay the prior turns in `agent.context`. See [Maximum session length](/guides/self-hosted-deployments-3-voice-agent-errors-warnings#maximum-session-length).

## Rate Limits

:::callout{intent="info"}
For information on Deepgram's Concurrency Rate Limits, refer to our [API Rate Limits Documentation](/guides/self-hosted-deployments-2-reference-api-rate-limits).
:::

## Deepgram Self-Hosted

:::callout{intent="info"}
Having challenges with performance and latency? Check out Deepgram's [Self-Hosted Solution](/guides/self-hosted-deployments-index) to get the benefits of running your own hosted instance of Deepgram.
:::

## Related pages

- [Architecture Overview](./self-hosted-deployments-3-voice-agent-architecture.md)
- [Build a Voice Agent](./self-hosted-deployments-3-build-a-voice-agent.md)
- [Template Apps](./self-hosted-deployments-3-voice-agent-template-apps.md)

# Agent Instructions

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