title: Making Sip call in android
body: <p>I am using ngn stack library to make sip calls.</p>
  
  <p>If I test on local server when I am connected to WI-FI, it works very fine with audio as well as video. But, on original server I am unable to make call, even there is no request being hit on server side. If I use other applications like 'ZOIPER' it works also fine.</p>
  
  <p>Following error occurs when I click call button after registering both clients. below is the logcat output for the error</p>
  
  <pre><code>12-14 10:35:54.146: D/org.doubango.ngn.services.impl.NgnSipService(4383): OnDialogEvent (Transport error,3)
  12-14 10:35:54.146: D/org.doubango.ngn.sip.NgnAVSession(4383): setState(TERMINATED)
  12-14 10:35:54.147: D/dalvikvm(4383): create interp thread : stack size=128KB
  12-14 10:35:54.149: D/org.doubango.ngn.media.NgnProxyAudioProducer(4383): stopCallback
  
  please help me out.
  </code></pre>