In reply to a post by dect:

Sky will probably want to go through the pointless motion of getting Openreach to replace the ONT before they look at investigating their own backhaul. Can't believe its Openreach's PON to be honest but trying to convince Sky is another matter.

Unfortunately Sky say there is nothing they can do and cannot send out an OR engineer as their system will not allow it as no fault is shown.

Specifically though, do you know if the OR speed test is between OLT and ONT omitting Sky's network ?

Yes

In reply to a post by Pheasant:

Yes

Thanks, what I thought.

In reply to a post by starfire:

Unfortunately Sky say there is nothing they can do

I've heard them say this before and I found that if you raise a high level complaint with Openreach they should then pass it to Sky high level complaints to deal with and so far this has ended up with a resolution from Sky. I cannot make a guarantee yours will go the same way.

You need to check the link status between the router and the ONT. A faulty port at either end could cause it to drop to 100Mbps, or become intermittent. The Openreach test won't have picked that up.

Ideally, when the router is connected to the ONT, you'd go to the router's web interface and ask *it* whether the WAN port is running at 1G or 100M. But most routers are too dumb for that.

If you're lucky, the following might work:

1. Plug in a PC with ethernet port, directly into the ONT, with a CAT5 cable. Check the NIC status on the PC to see whether it says 1G or 100M.

2. Then plug the PC's NIC directly into the router WAN port, also with a CAT5 cable. Do the same NIC status check.

If either of those shows 100M, it shows where the problem is. But if they both say 1G, you're none the wiser.

In neither case will you get Internet access. However you can in case (1), PC to ONT, if you configure a PPPoE client on your PC. If you do that and run a speedtest, it gives you another way to try to narrow down the problem, by ruling out a problem with Sky's router.

In reply to a post by dect:

I've heard them say this before and I found that if you raise a high level complaint with Openreach they should then pass it to Sky high level complaints to deal with and so far this has ended up with a resolution from Sky. I cannot make a guarantee yours will go the same way.

How do you raise a high level complaint with OR though? I thought consumers always had to go via their ISP ?

In reply to a post by candlerb:

You need to check the link status between the router and the ONT. A faulty port at either end could cause it to drop to 100Mbps, or become intermittent. The Openreach test won't have picked that up.

Ideally, when the router is connected to the ONT, you'd go to the router's web interface and ask *it* whether the WAN port is running at 1G or 100M. But most routers are too dumb for that.

If you're lucky, the following might work:

1. Plug in a PC with ethernet port, directly into the ONT, with a CAT5 cable. Check the NIC status on the PC to see whether it says 1G or 100M.

2. Then plug the PC's NIC directly into the router WAN port, also with a CAT5 cable. Do the same NIC status check.

If either of those shows 100M, it shows where the problem is. But if they both say 1G, you're none the wiser.

In neither case will you get Internet access. However you can in case (1), PC to ONT, if you configure a PPPoE client on your PC. If you do that and run a speedtest, it gives you another way to try to narrow down the problem, by ruling out a problem with Sky's router.

Yes, I run OpenWRT firmware on a 3rd party router and it confirms 1Gbps connection from router to ONT.

Haven't thought about my laptop directly into the ONT but I can try that.

I have tested from the router to my laptop using iperf and it consistently reports just under 1Gbps transfer rate.

In reply to a post by starfire:

How do you raise a high level complaint with OR though? I thought consumers always had to go via their ISP ?

Use the email address [removed by tbb] which high level complaints monitors, explain you have an issue and what speed your paying for and what you're currently getting and say the ISP is unwilling to sort the issue out for you.

Edited by seb (Mon 02-Feb-26 21:39:46)

In reply to a post by starfire:

Well, this issue is still ongoing.

Now I'm down to around 60Mbps and router/ONT reboots aren't helping.

Sky technical support say they can't find an issue, they contacted Openreach who apparently ran a test to my ONT and said it was reporting 150Mbps.

Personally I think the issue is elsewhere on Sky's network.

Do you have a Sky Q TV box with mini boxes maybe?

If you do then power off all the Sky TV boxes and reboot the router only and do another test. DO NOT reboot the ONT.

Had a few faults with random slow speeds or even connection drops and turning off the Sky Q set top boxes clears it.

No idea what causes it, but something to do with the Q boxes for sure, and even being hard wired makes no difference.

In reply to a post by TheInstaller:

Do you have a Sky Q TV box with mini boxes maybe?

If you do then power off all the Sky TV boxes and reboot the router only and do another test. DO NOT reboot the ONT.

Had a few faults with random slow speeds or even connection drops and turning off the Sky Q set top boxes clears it.

No idea what causes it, but something to do with the Q boxes for sure, and even being hard wired makes no difference.

Don't have mini boxes.

We tested by changing the WiFi SSD so only one device was then configured and connected, and wired we had everything disconnected apart from my laptop direct into a router port.