Kurento Group Call
This library has used this java implementatioan as a blueprint (https://github.com/Kurento/kurento-tutorial-java/tree/release-5.1/kurento-group-call).
For more in deep information please have a look at this site describing the concepts behind (http://builds.kurento.org/dev/latest/docs/tutorials/java/tutorial-6-group.html !! not available any more).
Communication / Activity Diagram
You can install this nodejs library using npn (https://www.npmjs.com/package/kurento-group-call).
For starting the example:
cd example npm install node server.js
This example is currently only running with Chrome or Firefox.