SIP trunk setup

Overview

LiveKit is compatible with any SIP trunking provider. This guide provides general instructions for setting up a SIP trunk with an external provider and then associating it with your LiveKit Cloud project.

External provider setup

The usual steps to create a SIP trunk are as follows:

1. Create a SIP trunk with your provider.
2. Add authentication or limit trunk usage by phone numbers or IP addresses.
3. Purchase a phone number and associate it with your SIP trunk.
4. Add your LiveKit SIP endpoint to the SIP trunk.

SIP endpoint

Depending on your SIP trunking provider, you might need to use a SIP endpoint to configure inbound calls instead of your SIP URI. The SIP endpoint is your LiveKit SIP URI without the sip: prefix. You can find your SIP URI on the Project settings page.

For example, if your SIP URI is sip:vjnxecm0tjk.sip.livekit.cloud, your SIP endpoint is vjnxecm0tjk.sip.livekit.cloud.

Provider-specific instructions

For step-by-step instructions for Telnyx, Twilio, or Plivo, see the following quickstarts:

LiveKit setup

Now you are ready to configure your LiveKit Cloud project to use the SIP trunk.

The following steps are common to all SIP trunking providers.

Inbound trunk setup

An inbound trunk allows you to accept incoming phone calls.

Create an inbound trunk using the LiveKit Cloud dashboard.

1. Sign in to the Telephony → Configuration page.

2. Select Create new → Trunk.

3. Select the JSON editor tab.

4. Select Inbound for Trunk direction.

5. Copy and paste the following text into the editor, replacing the phone number with the number you purchased from your SIP trunk provider:

   {
     "name": "My inbound trunk",
     "numbers": ["+15105550123"]
   }

6. Select Create.

Create a dispatch rule

You must set up at least one dispatch rule to accept incoming calls into a LiveKit room.

This example creates a dispatch rule that puts each caller into a randomly generated unique room using the name prefix call-. For many applications, this is the only configuration you need.

1. Sign to the Telephony → Configuration page.

2. Select Create new → Dispatch rule.

3. Select the JSON editor tab.

4. Copy and paste the following text into the editor:

   {
      "name": "My dispatch rule",
      "rule": {
         "dispatchRuleIndividual": {
            "roomPrefix": "call-"
         }
      }
   }

5. Select Create.

After you create an inbound trunk and dispatch rule, you can create an agent to answer incoming calls. To learn more, see the resources in the Next steps section.

Create an outbound trunk

Create an outbound trunk to make outgoing phone calls with LiveKit.

This example creates an username and password authenticated outbound trunk with the phone number +15105550123 and the trunk domain name my-trunk-domain-name.

1. Sign in to the Telephony → Configuration page.

2. Select Create new → Trunk.

3. Select the JSON editor tab.

4. Select Outbound for Trunk direction.

5. Copy and paste the following text into the editor:

   {
     "name": "My outbound trunk",
     "address": "<my-trunk-domain-name>",
     "numbers": [
       "+15105550123"
     ],
     "authUsername": "<username>",
     "authPassword": "<password>"
   }

6. Select Create.

Now you are ready to place outgoing calls.

Next steps

See the following guides to continue building your telephony app.

Additional documentation

See the following documentation for more details on the topics covered in this guide.