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

# Overview: Telephony

> Connect Ultravox to traditional phone networks for AI-powered voice calls.

Ultravox Realtime offers several options for connecting your AI agent to traditional phone networks.

## Connection Methods

Ultravox supports multiple ways to connect to phone networks:

<Columns cols={3}>
  <Card title="SIP" href="./sip">
    Connect your existing phone system through our SIP integration.
  </Card>

  <Card title="Telephony Platforms" href="./telephony-platforms">
    Native support for Twilio, Telnyx, Plivo, and Exotel.
  </Card>

  <Card title="Voice Platforms">
    Integrations with [Voximplant](/integrations/voximplant) and [jambonz](/integrations/jambonz).
  </Card>
</Columns>

## Learn More

* Discover how to get started with [Telephony Platforms](./telephony-platforms).
* Learn how to integrate with your existing phone system in the [SIP Guide](./sip).
* Build a custom integration with [Voximplant](/integrations/voximplant) or [jambonz](/integrations/jambonz).