1. Click the Gear icon on the upper right corner of the screen
2. Select Setup from the dropdown menu
3. In the Quick Find field on the left side of the screen, search for Visualforce Pages
4. Once the Visualforce Pages page loads, click the Preview Open CTI Index in New Window icon beside OpenCTIIndex. This action will open to a new tab or window
5. Copy the URL from the redirected tab or window
6. Return to the setup page
7. In the Quick Find field on the left side of the screen, search for Call Centers
8. Select Call Centers from the result
9. Under All Call Centers page, click Edit on Call Center for Engage Voice App
10. Paste the copied URL in the CTI Adapter URL field
11. Select the Save button