topic Re: Periodic dropouts in connection - router shows 0.00 noise margin... in Fibre

Periodic dropouts in connection - router shows 0.00 noise margin...

andyox — Tue, 09 Dec 2025 10:09:39 GMT

I'm getting periodic dropouts in broadband connection. Last one was earlier this morning. Browser video streaming was interrupted, and the laptop briefly showed No Internet connection. Several days ago, I had a more extended period of dropouts.

As I understand it a very low noise margin (see details below) means my connection is unstable with low tolerance to any noise on the line.

Is it possible that the Router is not displaying the noise margin correctly, and the figure is higher?

Is it possible, using DLM, to have the BB connection speed tweaked down somewhat to give more stability?

What's the best plan of action?

Thanks

Account Fibre 65

Fibre to cabinet line, then copper

Typical Download: 50 Mbps

Typical upload: 8Mbps

Router: SAGECOM FAST5364 3.00 vSG4K100208

Noise margin: Down 0.00 Up 3.00

Attentuation: Down 19.1 Up 0.00

xDSL connection time: 10d06h

Re: Periodic dropouts in connection - router shows 0.00 noise margin...

siphosethu-TT — Tue, 09 Dec 2025 10:14:36 GMT

Hi there @andyox, will need to run checks on the issue you are having so we can have it resolved as soon as possible. Please confirm if you are currently at home?

Re: Periodic dropouts in connection - router shows 0.00 noise margin...

andyox — Tue, 09 Dec 2025 10:24:00 GMT

Thanks. Yes, I'm at home.

Re: Periodic dropouts in connection - router shows 0.00 noise margin...

siphosethu-TT — Tue, 09 Dec 2025 10:27:51 GMT

Great, do the dropouts affect both wired and wireless connections in your home?

Re: Periodic dropouts in connection - router shows 0.00 noise margin...

andyox — Tue, 09 Dec 2025 10:40:38 GMT

The dropouts affect wireless connection. I haven't used wired connections for a while - so am not aware if this is an issue.

Re: Periodic dropouts in connection - router shows 0.00 noise margin...

siphosethu-TT — Tue, 09 Dec 2025 10:45:09 GMT

Thank you

Re: Periodic dropouts in connection - router shows 0.00 noise margin...

Mandisa-TT — Wed, 10 Dec 2025 09:30:17 GMT

Reboot the router (power off for 20-30 minutes, then power back on) and check the SNR/Noise Margin again.

If you’re on DSL, ensure the modem is on the primary socket, microfilters are fitted correctly (if required), and there are no extension leads that could introduce noise.

If the margin still shows 0.00 after reboot I will run checks.