title: Embedded audio conference API
body: <p>I really don't have knowledge about this area (WebRTC, video conference, audio conference, etc).</p>
  
  <p>I want to add to my system (web application) a client support using audio conference.</p>
  
  <p>I was looking for Twilio, it seems a good solution, but I think it doesn't fit my case, because it always need a virtual phone number to get works and I don't need it at my system.</p>
  
  <p>What I need is something like Facebook calls, Google Hangouts (without video).</p>
  
  <p>Is there any solution/library/API for it? It's no necessary be a free solution.</p>