I've found some support documentation on the Microsoft website so I'm going to have a look at that during my next meeting later on in the week.

I tried setting up a test call with just me on it but I think Teams is clever enough not to waste bandwidth on a screen share if there's no one else on the call.

Apologies if this is a bit obvious but are you connecting to work over a vpn?
Also 100/100mbps is vastly more than the minimum required (assuming nothing else in your household is eating bandwidth); I'm on an 80/20 FTTC connection and never have issues with Teams.

As noted the powerline Ethernet adapter link can be problematic. They can introduce random delays and lagginess due to electrical interference and the nature of their operation.

Think of the data connection over that link as a quite a “dirty” channel - this will be most noticeable in realtime comms such as video calls, where the random delays can result in some bad distortion etc.

It may not be the culprit, but it would the first thing I would eliminate in any reconfiguration / testing.

If you didn't have 150 posts I'd swear this was the output of GenAI. You do not need anywhere close to 100Mbps for Teams and the fix for this issue is not going to be the OP upgrading their service.

If the issue is only apparent when screen sharing, take a look at your CPU usage during those sessions. What spec is your computer?

Edited by jpm (Tue 27-May-25 19:11:18)

In reply to a post by jpm:

If you didn't have 150 posts I'd swear this was the output of GenAI. You do not need anywhere close to 100Mbps for Teams and the fix for this issue is not going to be the OP upgrading their service.

If the issue is only apparent when screen sharing, take a look at your CPU usage during those sessions. What spec is your computer?

Only when I'm screen sharing and only occasionally. I was in a meeting earlier and my screen sharing was fine. No issues at all so I'm a bit stumped at the moment.

Hi,

When you do have an issue, are there any other devices that might be using your connection? Maybe someone else doing Teams / Zoom in the house? Video chatting on their phone, per chance??

HTH,

In reply to a post by mking90031:

When you do have an issue, are there any other devices that might be using your connection? Maybe someone else doing Teams / Zoom in the house? Video chatting on their phone, per chance??

No, nothing else using the network during the day.

I'll keep investigating.

Easiest thing would be to order a network cable of the length required to go from your router to your PC and run that for a few days to rule your Powerline adapters out. A 30m cable is £14 delivered:

https://www.kenable.co.uk/en/networking/network-patc...

Sorry I'm lost. How do you have 100/100? I thought zen was 100/20 on full fibre? Still shouldn't be a problem but I'm a bit confused here. Is this a city fibre tier?

What upload speed tests are you seeing? Does it get any better with your video off?

Also, what are the specs of this PC? It might be the computer is too slow to encode the video and Teams thinks it's a network issue when it isn't.

In reply to a post by mr_mojo:

Sorry I'm lost. How do you have 100/100? I thought zen was 100/20 on full fibre? Still shouldn't be a problem but I'm a bit confused here. Is this a city fibre tier?

I'm guessing that it is.

My understanding is that CityFibre provision one of to services to ISPs: 100/100 or 900/900.

I am on Zen via CF, contracted as 300 symmetrical, but whilst I get the full 300 down, my upload speed is just over 900 as Zen only seem to cap the download speed.

.

Edited by MK65 (Thu 29-May-25 04:51:25)