// Node.js后端示例
const twilio = require('twilio');
const accountSid = 'YOUR_ACCOUNT_SID';
const authToken = 'YOUR_AUTH_TOKEN';
const client = twilio(accountSid, authToken);

app.get('/token', (req, res) => {
  const AccessToken = twilio.jwt.AccessToken;
  const VoiceGrant = AccessToken.VoiceGrant;
  
  const voiceGrant = new VoiceGrant({
    outgoingApplicationSid: 'YOUR_TWIML_APP_SID',
    incomingAllow: true
  });

  const token = new AccessToken(
    accountSid,
    'YOUR_API_KEY_SID',
    'YOUR_API_KEY_SECRET',
    { identity: 'user123' }
  );
  
  token.addGrant(voiceGrant);
  res.send({ token: token.toJwt() });
});

<script src="//sdk.twilio.com/js/client/releases/1.13.2/twilio.min.js"></script>
<script>
fetch('/token')
  .then(response => response.json())
  .then(data => {
    Twilio.Device.setup(data.token);
    
    Twilio.Device.ready(function(device) {
      console.log('Twilio.Device Ready!');
    });
    
    Twilio.Device.error(function(error) {
      console.log('Twilio.Device Error: ' + error.message);
    });
    
    Twilio.Device.connect(function(conn) {
      console.log('Successfully established call!');
    });
  });
  
function call() {
  Twilio.Device.connect({
    phoneNumber: '+1234567890' // 要拨打的号码
  });
}
</script>