<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Twilio WebRTC Voice Call</title>
    <script src="https://media.twiliocdn.com/sdk/js/client/v1.13/twilio.min.js"></script>
  </head>
  <body>
    <h1>Twilio WebRTC Voice Call</h1>
    <button id="callButton">Make a Call</button>
    <button id="hangupButton" disabled>Hang Up</button>
    <p>Status: <span id="status">Disconnected</span></p>

    <scrip