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Yet another speed/drop-out problem

Posts: 3
Registered: ‎27-09-2014

Yet another speed/drop-out problem

It's about 6 weeks since I switched to the usual fibre broadband, FTTC, and while it's been a lot slower than the Minimum Guaranteed Speed, it's been reliable and hugely faster than the previous ADSL. Over this time there have been signs of the normal speed testing and resulting speed increases, until things started going bad over the last week.

From the email of 14th April confirming the change was to be made:

At peak times, we estimate that you'll get the following speeds on your line: 

Download: 31 - 40Mb 
Upload: 6 - 9Mb 
Minimum Guaranteed Speed: 30.9Mb 

I've done checks with various sites that give speed comparisons, different ISPs plotted on the map, and for my location, the above figures look optimistic, though I realise that these sites may be biased toward people checking on lower than expected speeds.

Speeds settled to about 75% of the MGS, one of the fastest speeds reported from around my location, and reliable, with the usual margin between the Data rate reported by the router and the actual throughput. I was a little disappointed, but put it down to the usual advertising hype.

For the past bit-more-than-a-week, may have started just before the end of May, the system has been trying to push the speed, getting up to this, about 83% of the MGS

Data Rate:                                                      25.710 Mb/s / 5.943 Mb/s
Max. Attainable Data Rate (ATTNDR):        26.455 Mb/s / 5.946 Mb/s

And this is when the line drops started...

They seem to be happening after about 11pm, which sort of fits with a sensible trial and error timing, no obvious weather elements, though the forecast for the coming week suggests that if rain is a factor, it will be thoroughly tested.

Other info;

Modem/Router: BT Home Hub 5A running firmware OpenWrt 18.06.1 r7258-5eb055306f

Computer connected with Gigabit ethernet

Computer running Linux Mint, Kernel 4.15.0-51, all software up-to-date

There are, incidentally, known limits on the open-source drivers used by OpenWRT, not quite as fast as the stock BT firmware, but that only reduces the maximum throughput on the ethernet and Wi-Fi, not the ADSL/VDSL connection. Most of my LAN uses a separate Gigabit switch

I do have some settings under OpenWRT that might help reliability, but I don't want to confuse things.

If somebody has noticed I am not getting the MGS, and has started pushing things from your end, maybe they should stop trying so hard. There are two possible routes my connection to the cabinet could follow, one almost a straight line, and one about 150% longer, and the various surface physical signs, manhole covers and overhead cables, are consistent with both, so I can see how a mistake might have been made.



Plusnet Help Team
Plusnet Help Team
Posts: 7,277
Thanks: 762
Fixes: 291
Registered: ‎01-01-2012

Re: Yet another speed/drop-out problem

Thanks for getting in touch @WolfBaginski

We've tested your line and we can see that your speeds are below your minimum guaranteed speed however they aren't showing any cause for this.

So we can investigate this further please raise a fault here and post back once you've done so.

This will allow us to get this picked up straight away for you

If this post resolved your issue please click the 'This fixed my problem' button
 Matthew Wheeler
 Plusnet Help Team
Posts: 3
Registered: ‎27-09-2014

Re: Yet another speed/drop-out problem

I have one or two things still to check here, getting a replacement modem-to-master-socket lead

As I said, there are two plausible routes for the wire to take from the cabinet to here, and the distance difference is big enough to explain the speed difference, so if there's nothing obvious been detected, that could be the reason.