If you get the message in the browser:
JavaScript has been disabled or is not supported by your web browser which is needed by the Virtual KVM/Media applet. Please correct this problem.

Just download the JAR file from server.
Start the developer mode of your browser and search for “jar” to get the filename.
In my case it was M2.JAR

Now you have to download the file with http://<ip_of_lo100>/M2.JAR

Please note, that filename is CASE SENSITIVE.

To execute the java archive, JRE must be installed. I installed v8.121.

Now you can start it under Windows and Linux. Under Linux you have to mark the file as executable.