Telnyx SIP

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

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Prerequisites

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

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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.

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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.

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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.

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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 importing a SIP phone number in Butter AI.

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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.