Connection status icon

[Lee Cujes]

Hi Fred and team

Can you point me in the direction of further details of under what circumstances the connection icon in the top right changes colour?

We have a moderator who appears (given speedtests) to have more than adequate internet speed/quality, yet his connection icon is often red and his students report audio issues.

In what circumstances would this be the case? What is the threshold, and what is being tested to determine it?

Kind Regards

Lee Cujes

[Paulo Lanzarin]

>  Can you point me in the direction of further details of under what circumstances the connection icon in the top right changes colour?

https://github.com/bigbluebutton/bigbluebutton/blob/9649483cd489e0a058249b149cab0fc14453db83/bigbluebutton-html5/private/config/settings.yml#L538-L553

These are the basic stats used for the heuristics that indicate the connection "health". Notice that it does not include uplink/downlink bandwidth. We focus on round-trip

time, packet loss and jitter to try and infer whether a connection is not faring well for real-time conferencing.

The level property describes the colors you see in the connection status icon. Notice that all stats are arrays and are ordered from best to worse. So, for instance, if your

user has a consistent 10% packet loss (loss[1]), it'll trigger a danger indicator (level[1]). There's more to it, though; I'm just illustrating how if kind of works.

That being explained: a common fallacy is that high bandwidth is the sole requisite for a good video conferencing experience. In truth, packet loss and latency are far

more damaging to an user's experience in a realtime call than an internet link that is not in the 100 mbit range.

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[Lee Cujes]

Thanks prlanzarin, this is precisely what I was looking for.

Combined with "Presenters require a minimum of 16Mbps download and 2Mbps upload" (written in the docs elsewhere), I think we're getting close to understanding the requirements.

Do you know of any easy tests a teacher could do before a class that supplies an indication of jitter, packet loss and round trip time? In the example above, the teacher meets the speed requirements but is obviously failing one of the other requirements. Is there an easy way to troubleshoot this?

Kind Regards

Lee Cujes

[Paulo Lanzarin]

Well, there's a myriad of fine-grained speed testing websites out there that can give you info on RTT and jitter.

You have to look for one that provides a similar geolocation to your server's. So no, I don't have any specific

easy test to recommend.

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