RTCPeerConnection

Connection.js

var webRTCHub = $.connection.rtcHub;
    
    webRTCHub.client.sendMessage = sendMessage;
    $.connection.hub.start(startHub);

control.html

<video id="videoLocal" autoplay></video>
<video id="videoRemote" autoplay></video>
<button id="startBtn" disabled="disabled">Start Call</button>

script.html

<script src="Scripts/adapter.js"></script>
<script src="Scripts/jquery-1.6.4.js"></script>
<script src="Scripts/jquery.signalR-2.0.3.js"></script>
<script src="signalr/hubs"></script>

sendMessage.js

function sendMessage(data) {
        var message = JSON.parse(data);
        var connection = localPeerConnection || initialRTCPeerConnectionAPI();

        // An SDP message contains connection and media information, and is either an 'offer' or an 'answer'
        if (message.sdp) {
            connection.setRemoteDescription(new RTCSessionDescription(message.sdp), function () {
                if (connection.remoteDescription.type == 'offer') {
                    trace('received offer, sending answer...');

                    // Add our stream to the connection to be shared
                    connection.addStream(localMediaStream);

                    // Create an SDP response
                    connection.createAnswer(function (desc) {
                        // Which becomes our local session description
                        connection.setLocalDescription(desc, function () {
                            // And send it to the originator, where it will become their RemoteDescription
                            webRTCHub.server.send(JSON.stringify({ 'sdp': connection.localDescription }));
                        });
                    }, function (error) { trace('Error creating session description: ' + error); });
                } else if (connection.remoteDescription.type == 'answer') {
                    trace('got an answer');
                }
            });
        } else if (message.candidate) {
            trace('adding ice candidate...');
            connection.addIceCandidate(new RTCIceCandidate(message.candidate));
        }

        localPeerConnection = connection;
    }

serverside.cs

using System;
using System.Web;
using Microsoft.AspNet.SignalR;
namespace WebRTCDemoWithSignalR
{
    public class rtcHub : Hub
    {
        public void Send(string message)
        {
            // Call the sendMessage method to update clients.
            Clients.Others.sendMessage(message);
        }
    }
}