title: echo issue in android pjsua2 (pjsip) android
body: <p>I have integrated pjsip for Android and every thing is fine. But I am having only one problem that is echo.</p>
  
  <p>Here is mycode in <code>MyApp.java</code></p>
  
  <pre><code>/* Set media config. */
  MediaConfig media_cfg =epConfig.getMedConfig();
  media_cfg.setSndAutoCloseTime(0);
  media_cfg.setEcOptions(2);
  media_cfg.setEcTailLen(100);
  </code></pre>
  
  <p>Your help help will be appreciated.</p>