title: opentok interconnect with node js express
body: <p>I am implementing opentok interconnect with nodejs express.
   Getting <strong>error</strong>: </p>
  
  <blockquote>
    <p>No callback given to dial, while implementing dial-out.</p>
  </blockquote>
  
  <p>My use case is as per documentation.</p>
  
  <p>I am able to get all required values like <strong><em>config, sessionId, token, auth.</em></strong> , but still unable to connect the call.</p>
  
  <pre><code>    opentok.dial(sessionId, token, config.uri, options, {  
     auth: {      
   username: config.uname, password: config.pass     } 
  }, 
     function (err, sipCall) {  
      if (err) 
        return res.status(500).send('Platform error starting SIP Call:'+err); 
        res.send(sipCall);   
   });
  </code></pre>