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

# SIP Trunking

> Step by step guide to understand SIP trunking

## What is SIP Trunking?

**SIP Trunking** is a cloud communication service that allows you to connect your phone numbers from a provider to SigmaMind's SIP infrastructure.

This enables your AI agents to :

* Receive **inbound calls** on your existing numbers.
* Make **outbound calls** using your provider’s numbers.

***

## Prerequisites

Before setting up SIP trunking, ensure the following:

* You have already purchased a number from **Twilio** or **Telnyx**.
* You have access to the provider’s dashboard to configure SIP trunking.
* You have access to **SigmaMind** Dashboard to register and manage numbers.

***

## SigmaMind SIP Trunking Requirements

To connect a number to **SigmaMind**, you will need:

* **SIP Server URI**:\
  `sip:28y698lhv2f.sip.livekit.cloud`

* **Transport Methods Supported**:
  * UDP
  * TCP
  * TLS

* **Media Encryption Supported**:
  * SRTP

<Note>
  Currently, **SigmaMind** does **not** support static IP whitelisting.\
  If your provider requires IP whitelisting, this may not work.
</Note>

***

### Provider Guides

To set up SIP trunking with your provider, follow the detailed guides:

* [Twilio SIP Trunking Guide](/documentation/numbers/sip-integration/providers/twilio)
* [Telnyx SIP Trunking Guide](/documentation/numbers/sip-integration/providers/telnyx)