Connect to ElevenLabs

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Overview

Calls to your Callr number are routed over SIP to an ElevenLabs Agent. Callr handles the phone number, carrier connectivity and call routing. ElevenLabs handles speech recognition, the conversation and speech synthesis.

How it works

1. A caller dials your Callr number.
2. Your Callr Actions scenario uses dial@v2 to send the call to sip.rtc.elevenlabs.io over TLS, addressed to your number.
3. ElevenLabs matches the number in the SIP URI with a number imported in your ElevenLabs account, and hands the call to the agent assigned to it.
4. Audio flows between the caller and the agent until one side hangs up.

Prerequisites

• A Callr account, a Callr phone number and a Callr Actions scenario
• An ElevenLabs account with an agent configured (voice, prompt, tools)

Step 1 – Import your Callr number in ElevenLabs

In ElevenLabs, open Phone Numbers, click Import number, then From SIP Trunk.

Click Import.

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The number must match exactly

ElevenLabs routes the call on the user part of the SIP URI. +33199001234 in the URI only matches +33199001234 in ElevenLabs: keep the + on both sides.

Step 2 – Assign your agent

Select the imported number, click Assign Agent, and choose your agent.

Step 3 – Create the Callr scenario

description: Route inbound calls to an ElevenLabs agent

compat:
  version: "2025-09-01"

defaults:
  autoAnswer: false

branches:
  inbound-call:
    actions:
      - action: dial@v2
        params:
          targets:
            - number: sip:[email protected]:5061;transport=tls
              timeout: 60

Replace +33199001234 with the number you imported in Step 1. Port 5061 with transport=tls encrypts the signaling, and media is encrypted with SRTP.

Step 4 – Attach the scenario to your number

In the Callr Console, open your phone number and attach the scenario.

Step 5 – Test

Call your Callr number, then check that:

• the Live Debugger shows dial@v2 with the status bridged;
• the call appears in the agent's conversation history in ElevenLabs, with its Phone Call tab.

Secure the trunk

Once the test call works, restrict who can send calls to your imported number: in its inbound settings, set Allowed Source IP Addresses to the Callr SIP addresses listed in SIP Connectivity for your region. Make a new test call after the change.

Add a fallback

Routing stays in Callr, so you can add business hours, an IVR before the agent, recording, or a fallback to a human when the agent does not answer:

compat:
  version: "2025-09-01"

branches:
  inbound-call:
    actions:
      - action: startRecording@v2

      - action: dial@v2
        params:
          targets:
            - number: sip:[email protected]:5061;transport=tls
              timeout: 20
            # called if ElevenLabs does not answer within 20 seconds
            - number: "+33199005678"
              timeout: 60
        result: $dial

      - if: "!$dial.ok"
        action: play@v3
        params:
          tts:
            text: Sorry, we are unable to connect you at the moment.

Call recording must comply with the rules of your jurisdiction.

Troubleshooting

See ElevenLabs' SIP trunking guide for every inbound setting.