This topic

Fibre

Del61 — Tue, 09 Dec 2025 23:43:35 GMT

I upgraded to fibre , everything was done ,bt engineer put all the equipment inside but could not connect to the hub as there was a red light on the box he said when there is 2 green lights just plug the hub in and it should just work, did tgat after a week when 2 green lights but the hub was flashing red and there was 3 green lights still trying to get it fixed , bt should of been out on moody but no show .

Fibre upgrade

Del61 — Tue, 09 Dec 2025 23:51:09 GMT

I upgraded to fibre , everything was done ,bt engineer put all the equipment inside but could not connect to the hub as there was a red light on the box he said when there is 2 green lights just plug the hub in and it should just work, did that after a week when 2 green lights but the hub was flashing red and there was 3 green lights still trying to get it fixed , bt should of been out on moody but no show . Had to go back to the old system at the moment

Re: Fibre upgrade

chrisjp — Wed, 10 Dec 2025 11:40:22 GMT

If you could go back to the old system (which I presume you mean you've plugged your hub into the old telephone master socket) - and it works, this suggests that your FTTP system hasn't yet been fully turned on, despite the green lights on the ONT.
You're probably best reporting this as a fault using the online system - www.bt.com/exp/engineer-booking.
This avoids having to speak with BT's telephone agents who really only want to upsell you something so they can get their commission, and are not trained in understanding faults.
As an aside, it would have been an Openreach engineer who installed your fibre, not a BT one. But, because of Ofcom requirements, you have to raise all issues with BT as your service provider.

Re: Fibre upgrade

Del61 — Wed, 10 Dec 2025 16:12:30 GMT

Yes I have gone back to my old master socket which is not turned off yet, should my hub be set at full fibre mode.
Should I change it ,would it change the hub settings and if it didn't work how could I turn it back ?.

Re: Fibre upgrade

licquorice — Wed, 10 Dec 2025 16:23:37 GMT

It doesn't matter how your hub is set until you change to FTTP. All it does is change port 4 from a LAN port to a WAN port. When you get FTTP, you connect the ONT (optical modem) to port 4.

Re: Fibre upgrade

Del61 — Wed, 10 Dec 2025 16:31:21 GMT

I have plugged it in port 4 as I was told when I saw 2 green lights on and when I plug it in all 3 lights are green and the hub just flashes pinky / red

Re: Fibre upgrade

licquorice — Wed, 10 Dec 2025 17:24:00 GMT

Right, if the ONT is green you need to set the Hub to FTTP mode and disconnect the DSL lead.

Re: Fibre upgrade

chrisjp — Wed, 10 Dec 2025 17:32:55 GMT

If your hub was NOT set for Port 4 to be a WAN port (that is for full fibre, Fibre to the Premises, FTTP) then that may be why your hub won't connect when it's plugged into Port 4.
For Fibre to the Cabinet (your old system) it doesn't matter which way Port 4 is configured because it's not used to connect to the Hub.
I would set your Port 4 to WAN (FTTP) mode and try connecting to your hub again.
You can change Port 4 mode back and forth by accessing the Hub manager by typing 192.168.1.254 into a browser on a computer connected to the Hub, and switching "Full Fibre Mode" from "Off" to "On" and vice-versa.

Re: Fibre upgrade

Del61 — Wed, 10 Dec 2025 19:33:51 GMT

if I switch to full fibre mode from off to on would I not loose Internet to change it back if i had to, I was told to plug it into port 4

Re: Fibre upgrade

iniltous — Wed, 10 Dec 2025 19:53:28 GMT

If you don’t normally have anything in the 4th yellow socket , like a smart TV or a games console, then switching it from LAN to WAN obviously can’t affect anything , because nothing is using that socket , but as stated for the router to connect to the ONT successfully (so using FTTP ) the router via the 4th port connected to the ONT needs to be set to ‘full fibre mode’ to turn the 4th socket to a WAN socket from a LAN

FWIW , the fact your ADSL/VDSL is still working suggests switching to full fibre mode when connected to the ONT won’t fix the issue , as your account details are still associated with the copper pair based service, but obviously in the future when whatever the problem is sorted this is how the router and ONT will need to be connected together.

TBH , if the LOS light was lit when the engineer was on site , then the ONT was probably never authenticated successfully (the ONT normally needs to be connected correctly to do this ) , so I think you will need to a new engineer visit to authenticate the ONT now the LOS light is extinguished and the PON light is green , the engineer who said wait until the light goes from red to green and it will work was probably being a little optimistic.

Re: Fibre upgrade

gg30340 — Wed, 10 Dec 2025 19:57:38 GMT

If you turn FTTP on in the hub's management pages and if you are still on a working VDSL line and you have the hub plugged into your phone line nothing will change. The VDSL broadband will still work and you can happily turn it on or off without affecting the VDSL broadband line.

If you have been changed to FTTP and you have connected port 4 of the hub to the ONT and the ONT lights are all green and you have checked that FTTP in the management pages is turned on your FTTP connection should start.

If it does not make sure you have unplugged your phone line from the hub.

If it still does not work you would appear to have a problem that will require you to report a fault to BT.

Re: Fibre upgrade

Del61 — Wed, 10 Dec 2025 19:58:40 GMT

I will just have to contact BT again and wait at least I still have Internet I don't want to move anything incase i make problems.

Re: Fibre upgrade

licquorice — Wed, 10 Dec 2025 22:47:12 GMT

I give up, you are not listening to the answers to your questions.

Re: Fibre upgrade

Del61 — Wed, 10 Dec 2025 23:33:13 GMT

If i turn the FTTP on in the hub's management pages will it not change the settings and I would have to disconnect from my master socket and move it to the fibre socket and if it doesn't work how can I get back to normal broadband if the hub changes the setting , would I have to do a factory reset ?

Re: Fibre upgrade

gg30340 — Thu, 11 Dec 2025 07:40:57 GMT

You should already have plugged into the fibre socket otherwise how do you expect your new fibre to work!

I have already explained that if you turn on the Fibre in thd hubs settings IT WILL NOT affect your "old" broadband or its settings.