Skip to main content
This guide walks you through setting up Telnyx to route calls to Butter AI.

​
Prerequisites

  • A Telnyx account.
  • A phone number in your Telnyx account.
  • A Butter AI SIP Inbound Trunk created (see Import Phone Number).

​
Step 1: Create a SIP Connection

  1. Log in to the Telnyx Portal.
  2. Navigate to Voice > SIP Trunking > SIP Connections.
  3. Click Add SIP Connection.
  4. Name it (e.g., “Butter AI”).
  5. Select SIP Trunking.
  6. Click Create SIP Connection.

​
Step 2: Configure Inbound Routing

This tells Telnyx where to send incoming calls.
  1. In your new SIP Connection, find the Inbound settings.
  2. SIP Transport Protocol: Select TCP (or UDP if preferred, but TCP is recommended for reliability).
  3. DNIS Type: E.164.
  4. Expert Settings: Ensure codecs include PCMU (G.711u) and PCMA (G.711a).
  5. SIP URI:
    • Select Add New IP/URI.
    • Type: SIP URI.
    • URI: The SIP Server Address provided by Butter AI (e.g., sip.your-region.livekit.cloud).
    • Port: 5060.
  6. Click Save.

​
Step 3: Assign a Number to the Connection

  1. Navigate to Numbers.
  2. Find your phone number.
  3. In the Connection dropdown, select the “Butter AI” connection you just created.
  4. Click Save.

​
Step 4: Configure Outbound (Optional)

If you plan to make outbound calls from Butter AI through Telnyx:
  1. In your SIP Connection, go to Outbound.
  2. Outbound Profile: Create a new profile or select an existing one.
  3. Authentication Method:
    • Select Credentials.
    • Create a Username and Password.
    • You will use these credentials when configuring the “Outbound SIP Trunk” in Butter AI.

​
Step 5: Verify

Call your Telnyx phone number. The call should route through Telnyx to the Butter AI SIP URI and connect to your agent.