title: Exchanging WebRTC RTCPeerConnection signals manually
body: <p>I read that RTCPeerConnection doesn't care about the transport mechanism chosen to exchange signals (websocket, google channel, etc..). Do you think it would be possible to collect those signals, encode them with JSON and ask the user to send them to the other peer using an external mechanism (chat, email, ...) in order to completely bypass the need of a remote server? </p>
  
  <p>I've done a little POC and this seems working only when both peers are on the same machine; any clue?  </p>
  
  <p>Thanks! </p>