> ## Documentation Index
> Fetch the complete documentation index at: https://docs.lyzr.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Voice Configuration

> Voice engine and telephony configuration options.

# Voice Configuration

Voice configuration controls the engine, providers, behavior, and telephony settings used by a voice agent.

## Core settings

* Engine mode: Realtime or Pipeline
* Voice and speaking style
* STT, LLM, and TTS providers for Pipeline mode
* Who speaks first
* Knowledge and tool access
* Call recording and transcript settings

## Telephony

Connect providers such as Twilio, Telnyx, or Plivo, then assign phone numbers to voice agents.