Technical Prerequisites

Below are some frequently asked questions regarding the technical prerequisites for our eLearning If your question is not answered in the FAQ below, please send an email to We will get back to you with a solution right away!


Questions considering browser, firewall settings, etc.

Which browsers meet all criteria?

  • Participants have an HTML5 capable browser (Chrome, Firefox, Edge) on their desktop operating system
  • JavaScript is enabled at the browser and domain
  • Synchronized audio input and is set up on the system (implicitly via telephone), e.g. using a headset

Do I need to make changes to my firewall?

  • The firewall of the computer or network firewall does not block outgoing connections to all NO MONKEY sub-domains * The WebRTC protocol (tunneling is done via a TURN server and can be tested in advance with

  • TCP/IP ports 80/443 (for HTTP/HTTPS)

  • UDP ports in the range 16384 - 32768 (for FreeSWITCH/HTML5 RTP streams)


Questions considering your bandwidth, workplace, etc.

What do I need to consider about my workplace?

The computer has:

  • At least downstream bandwidth of at least 3 MBit/s and upstream of 1 MBit/s

  • Recommended quad core processor and 8 GB working memory or more

  • Recommended a workplace with two screens where one is of 24" inch, mouse and keyboard