title: How can one initiate a call in Linux?
body: <p>i am trying to implement a telephone service between <strong>two Linux computers</strong> using their in-built Mics and Speakers. I have managed to transmit Audio signals using <strong>WLAN</strong> over <strong>IP</strong> from one Linux computer to another using <strong>Gstreamer Tool</strong>.And it is Real time ( i used <strong>RTP, UDP</strong> )</p>
  
  <p>In the whole Real-time-call story , this would only be the Media transfer level. </p>
  
  <p>Now my question is how do i implement a signaling application i.e. it would try to connect to a destination IP and port and if it an <strong>acknowledgment</strong> is received the <strong>Transport layer</strong> (my Gstreamer Tool ) would start to work and send voice signals?  </p>