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My connection is unstable. What do I do?

How to check and improve your internet connection for lessons.

The picture freezes, the sound cuts out or you get kicked out of the room? It's usually your internet connection. For lessons, you need at least 10 Mbps upload.


How do I check my connection?

Before the lesson: Do the tech check. From 10 Mbps upload, you're in the green. Learn more in How do I test my camera, microphone and internet before a lesson?

During the lesson: Click the speedometer icon at the top right.

Under Network, you see how good your connection is right now and get tips if it's weak.


How to improve your connection

  • Connect your computer to the router with a LAN cable. That's the most important improvement.

  • If you use Wi-Fi, sit as close to the router as possible, ideally in the same room.

  • Close other programs and tabs.

  • Pause downloads, streaming and updates, also on other devices on your network.

  • Restart your router.

  • Try a different network, for example your phone's hotspot.

Quick help during the lesson

If the connection is weak, briefly turn off your camera. The sound then continues more reliably.


VPN, proxy and firewall

SIRIUS connects you directly with the other person. A VPN or proxy can interfere with this connection.

  • Turn off your VPN during the lesson.

  • On company or school networks, a firewall can block the connection. Outgoing traffic over TCP and UDP on port 443 must be allowed there. The IT department sets this up.

Restrictions in some countries

In some countries, for example Russia, China and the United Arab Emirates, this type of connection is restricted. SIRIUS may only work partly or not at all there.


Still not working?

Message us in the chat via the question mark at the bottom right of your account. Or book a short tech support appointment. We'll solve the problem together on a video call.

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