ADSL Connection & Though-put Reduction

Hi All,
I have been having intermittent throughput issues with my ADSL connection for 1 year now, there have been many Openreach visits [copper path engineers] but from what I can see a real lack of anyone looking into the equipment side. There are a lots of details I could share but will try and keep the word count down.

My ADSL connection is 18Mb/0.8Mb, normally the throughput is 13Mb and a latency of 20-30 ms.
When the problem occurs the throughput reduces to 0.5Mb/0.01Mb with latency 1000ms [packet loss], the ADSL side remains as above, the ADSL connection never drops, there are no errors that are incrementing much more than 1 in 60 secs. I have the problem with an Ethernet cable which rules out wifi. The problem happens early evening or between 9 and 11am, not every day, can go for days/weeks without a problem. When the problem occurs it lasts for hours, you cannot even load web pages. We have had a REIN engineer who has ruled out issues. I have had my service moved to different equipment. I have tried traceroute and the when the problem occurs it points to the exchange.

I have noticed that when the problem occurs, if I power off the router and then back on again often the service is restored, sometimes it lasts say 60-120 seconds, other times for the rest of the day/evening, it is not an exact science but a couple of goes will restore service. I have since tried disconnecting the cable to the master phone socket and leaving the router powered, same result.

So looking for some insight into what dropping the ADSL link may be doing that resolves the problem, I’m thinking it could be flushing addresses rather resetting something ADSL related, I have noticed that the problem has not now happened for 2 weeks and that I am currently assigned an IP address from a different range to when I last had the issue and pulled the cable.

Any thoughts on what may be happening here please.

If the sync rate from the exchange isn’t changing, or dropping, my guess is, it’s something your end.

Are you able to disable the routers wifi, and just run a single ethernet connection to a newish machine ?

My guess is that some device on the LAN side of your router is swamping the upstream bandwidth …. Phones backing up to the cloud and similar cause exactly the kind of issue you describe

Yes, have disabled the routers wifi, have had just one laptop connected via ethernet, same issue.

I can see there is no other traffic based on the router status and also wireshark. When i disconnect the laptop the router LEDs are static.

If a phone or something else backing up to the cloud was the problem then powering off/on the router or removing the cable would not help, the backup would resume.