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Sudden changes to speed & latency.....why?

Community Veteran
Posts: 1,259
Thanks: 20
Fixes: 3
Registered: 22-06-2012

Sudden changes to speed & latency.....why?

About 10 days ago during some overnight Plusnet maintenance to one of its systems my Gateway changed, as I had expected. However, my fibre speed dropped markedly & my latency doubled. During this period my speed checks also became very erratic. I have tried a couple of Gateway changes but with no positive result.
When I logged on just after 6 AM this morning I checked as usual & lo & behold both my speeds & latency have returned to their previous values. My Gateway hasn't changed.
Is anyone able to provide me with an explanation? If so I will be most grateful. Roll eyes

4 REPLIES
Community Gaffer
Community Gaffer
Posts: 5,186
Thanks: 512
Fixes: 5
Registered: 04-04-2007

Re: Sudden changes to speed & latency.....why?

Sounds like Fibre DLM to me!
Kelly Dorset
Broadband Service Manager
Community Veteran
Posts: 1,259
Thanks: 20
Fixes: 3
Registered: 22-06-2012

Re: Sudden changes to speed & latency.....why?

Quote
Fibre DLM to me!

Thanks Kelly. Over which neither you nor BT have any control? Huh
Community Gaffer
Community Gaffer
Posts: 5,186
Thanks: 512
Fixes: 5
Registered: 04-04-2007

Re: Sudden changes to speed & latency.....why?

We can't influence the Fibre DLM.  It's looking at the errors/stability of your line and making its own decisions.  Perhaps you were on a threshold and the maintenance disconnection triggered it, but because your line was stable for that whole period, the next disconnection let the DLM relax a bit Smiley
Kelly Dorset
Broadband Service Manager
Community Veteran
Posts: 1,259
Thanks: 20
Fixes: 3
Registered: 22-06-2012

Re: Sudden changes to speed & latency.....why?

Thanks Kelly, I continue to learn more & more.