Overview

This guide shows how to integrate Vapi with Vobiz using the dashboard. By the end, you'll be able to make outbound calls where your AI assistant talks to real people on their phones.

Prerequisites

Before starting:

Step 1: Create SIP Trunk Credentials in Vapi

1. Log in to Vapi Dashboard
2. Click on Integrations in the sidebar
3. Navigate to SIP Trunk Credentials
4. Click Add New Credential
5. Name your trunk (e.g., "Vobiz Trunk")
6. Add Gateway URL: Enter your Vobiz SIP domain from Vobiz Console (e.g., bfab10fb.sip.vobiz.ai)
7. Add Credentials: Enter username and password from your Vobiz trunk
8. Enable outbound calling
9. Click Save

Step 2 & 3: Get Vobiz SIP Credentials

From Vobiz Console:

1. Log in to Vobiz Console
2. Go to SIP Trunk → Outbound Trunks → Trunks
3. Select your trunk
4. Scroll down to the Authentication & Linking section
5. Copy the SIP Domain, Username, and Password

Use these credentials in Vapi:

• SIP Domain/Gateway URL: bfab10fb.sip.vobiz.ai
• Username: Vapi_user
• Password: Password@123

These are the credentials you enter in Step 1 above.

Step 4: Import Your Phone Number

1. In Vapi Dashboard, go to Phone Numbers
2. Click Add Number
3. Select BYO SIP Trunk Number
4. Enter your Vobiz number (e.g., 08071387149 - the number you purchased from Vobiz)
5. Select SIP Trunk Credentials: Choose the credential you created in Step 1
6. Give it a label/name (e.g., "Vobiz Main Line")
7. Click Import SIP Trunk Number

Step 5: Make an Outbound Call

1. In Vapi Dashboard, click Make a Call or go to Phone Calls → New Call
2. Go to Outbound Settings
3. Enter the phone number you want to call (e.g., +919148223344)
4. Select your assistant from the dropdown
5. Select the phone number to call from (your imported Vobiz number)
6. Click Make Outbound Call
7. The call will initiate!

Step 6: Configure Call Transfer Tool

To enable the AI agent to transfer calls to a human agent or another department, you need to configure the "Transfer Call" tool.

1. Select "Transfer Call" from Tools menu

2. Configure Destination and Transfer Mode

1. In the Vapi Dashboard, navigate to the Tools section.
2. Click Create Tool and select Transfer Call from the dropdown menu.
3. Phone Number: Enter the destination number in E.164 format (e.g., +919876543210).
4. Transfer Mode: Select Blind Transfer.
5. Click Create Destination or Save to confirm.

Troubleshooting

Inbound Step 1: Create Inbound SIP Trunk in Vapi

1. In Vapi Dashboard, click More → Integrations in the sidebar
2. Navigate to SIP Trunk and click Create New SIP Trunk
3. Name the trunk (e.g., "Vobiz Inbound Trunk")
4. Add Gateway IP: 13.233.44.61
5. Check Allow Inbound Calls
6. Set Port: 5060, Netmask: 32, Protocol: UDP
7. Uncheck Outbound Calls (for inbound-only)
8. Click Save

Inbound Step 2: Get the Vapi Trunk ID

After saving the trunk in Vapi, you need the Trunk ID to configure Vobiz. The Trunk ID is only available via the Vapi API.

Run this cURL command to list your SIP trunk credentials:

curl -X GET "https://api.vapi.ai/credential" \
  -H "Authorization: Bearer <YOUR_VAPI_API_KEY>"

Get your API key from Vapi Dashboard → Organization Settings.

Find the trunk matching your inbound trunk name in the response:

{
  "id": "46deea29-645d-44a3-bf42-7c6ec2d4b65c",
  "orgId": "0c147555-d9bc-41ff-8c89-82eca29f891c",
  "provider": "byo-sip-trunk",
  "gateways": [
    {
      "ip": "13.233.44.61",
      "outboundEnabled": false
    }
  ],
  "name": "Vobiz Inbound Trunk"
}

Inbound Step 3: Create Inbound Trunk in Vobiz Console

1. Log in to Vobiz Console
2. Go to SIP Trunks → Inbound Trunk
3. Click Create New Trunk
4. Name the trunk (e.g., "Vapi Inbound")
5. Set Transport: UDP
6. Set Primary URI to: <VAPI_TRUNK_ID>.sip.vapi.ai
   Example: 46deea29-645d-44a3-bf42-7c6ec2d4b65c.sip.vapi.ai
7. Link your Vobiz phone number to this trunk
8. Click Save

Inbound Step 4: Import Phone Number in Vapi

1. In Vapi Dashboard, go to Phone Numbers in the sidebar
2. Click Create Phone Number
3. Select BYO SIP Trunk Number
4. Enter your Vobiz phone number (e.g., +918071387376)
5. In SIP Trunk Credential, select the inbound trunk you created in Step 1
6. Label it (e.g., "Vobiz Inbound Line")
7. Click Import SIP Phone Number

Inbound Step 5: Assign Assistant & Test

1. On the phone number you just imported, scroll down to Inbound Settings
2. Under Select Assistant, choose your Vapi AI assistant
3. Click Save
4. Test it! Dial your Vobiz number from any phone — your AI assistant will answer

Next Steps