title: Looking for a VoIP service provider
body: <p>I am looking for a VoIP service my application can use to call landlines and mobile phones.</p>
  
  <p>What I need:</p>
  
  <ul>
  <li>I would generate an audio file and send it to the service. The service would then place the call and play the audio file. </li>
  </ul>
  
  <p>Other features that would be a plus:</p>
  
  <ul>
  <li>TTS (I send text and the service converts it to audio for me)</li>
  <li>Ability to receive DTMF responses</li>
  </ul>
  
  <p>Any suggestions?</p>