This was suggested years ago and it worked for me years ago.

Only a suggestion. Worth a try and can be tested quite quickly with a mobile to see if phone rings.

Good morning all.
so this will probably be my last post on this problem. i moved the router so it was directly connected to the master socket then i even removed the phone. The line still keeps dropping out. As you can see from the list below it happens every other day and nearly always on both weekend days. It's been suggested that this is acceptable but i really can't remember this happening in the past and i would really like it to stop happening as it messes up a "smart" TV with constant IP address changes (i think)

So is this a fault or not?

Apr 30 08:53:31 INFO Internet down
Apr 30 08:54:17 INFO Internet up, PPPoA VC-Mux, 0/38, IP=79.64.119.254
May 1 21:33:03 INFO Internet down
May 1 21:34:25 INFO Internet up, PPPoA VC-Mux, 0/38, IP=79.72.109.144
May 1 23:19:40 INFO Internet down
May 1 23:20:58 INFO Internet up, PPPoA VC-Mux, 0/38, IP=79.72.110.234
May 2 09:25:14 INFO Internet down
May 2 09:26:36 INFO Internet up, PPPoA VC-Mux, 0/38, IP=79.64.6.91
moved router
May 3 10:42:24 INFO Internet up, PPPoA VC-Mux, 0/38, IP=88.144.124.75
May 5 14:17:49 INFO Internet down
May 5 14:18:32 INFO Internet up, PPPoA VC-Mux, 0/38, IP=79.72.111.1
May 7 18:14:30 INFO Internet down
May 7 18:15:13 INFO Internet up, PPPoA VC-Mux, 0/38, IP=79.64.117.70
May 9 17:13:41 INFO Internet down
May 9 17:14:24 INFO Internet up, PPPoA VC-Mux, 0/38, IP=79.64.119.3
May 10 22:42:19 INFO Internet down
May 10 22:42:59 INFO Internet up, PPPoA VC-Mux, 0/38, IP=79.72.111.250
May 12 06:41:07 INFO Internet down
May 12 06:41:49 INFO Internet up, PPPoA VC-Mux, 0/38, IP=88.144.124.31
May 14 15:40:38 INFO Internet down
May 14 15:41:23 INFO Internet up, PPPoA VC-Mux, 0/38, IP=62.64.183.90
May 16 14:11:10 INFO Internet down
May 16 14:11:52 INFO Internet up, PPPoA VC-Mux, 0/38, IP=62.64.183.90
May 17 20:32:22 INFO Internet down
May 17 20:33:01 INFO Internet up, PPPoA VC-Mux, 0/38, IP=79.64.6.106

We just switched to the Post Office Fibre Broadband from Plusnet after our contract expired and the price was bumped up.
Installed the new ZYXEL VMG3925-B10A Router - worked ok on Ethernet or on WI-FI with nearby devices, but my Desktop PC which is upstairs and not near the router kept getting cut-off after a few minutes.

After restarting and tweaking various settings on Zyxel Router (Nightmare - need a degree in Telecoms to even understand it) - which DID NOT solve the problem - I despaired, panicked and ordered a beefier Wi-Fi Dual Hub USB Adapter, thinking this would solve the problem.
In the meantime, I wondered if the old PLUSNET router would still work with the Post Office Broadband?
Answer: YES! Just use the old password and BINGO problem solved - no more dropped connections!
In your face ZYXEL!
Did not ask or tell the Post Office that we are using a competitors Router.

Those dodgy Chinese ZYXEL routers don't seem to be setup properly!

Thanks for your reply I thought this post was dead! My connection just keeps getting worse it’s now most days it drops out and restarts. Only about 2 minutes but still really annoying. Unfortunately I binned all the old routers as I was fed up with having them lying around. But I have raised the problem with the post office again, but have yet to have a reply.... (I just checked I raised a ticket on the 3rd and they haven’t got back to me) I only have 3 months left on the contract so I think it will be time to move on…

In reply to a post by mr_fid:

Thanks for your reply I thought this post was dead! My connection just keeps getting worse it’s now most days it drops out and restarts. Only about 2 minutes but still really annoying. Unfortunately I binned all the old routers as I was fed up with having them lying around. But I have raised the problem with the post office again, but have yet to have a reply.... (I just checked I raised a ticket on the 3rd and they haven’t got back to me) I only have 3 months left on the contract so I think it will be time to move on…

Yeah, I know what you mean about the old routers - we have a few we need to get rid of - some people sell them on Ebay. We only left Plusnet because they hiked the Tariff, but they did actually offer us a better deal when they found out we were leaving for the Post Office. I would recommend Plusnet (although the phone charges are a bit pricey), as our Plusnet Hub One router seems pretty solid compared to the ZyXel Router.
I am a bit suspicious of those Chinese branded ones - look at what's happening with Huawei and the 5G spyware allegations - I wouldn't be suprised if ZyXel gather data and send it back to China somehow!

If you have only 3 months to go, you could stick it out with the Post Office. Basically, I was told that the ISP's in our area use the same exchange and fibre network anyway, it's all serviced by BT Openreach, unless you are using Virgin who have their own Cable network.
The actual Telecoms behind it seems to be a Black Art - from Talking to the Technical Support of the ISP's I get the impression that even they don't fully understand it! I could talk to them all day and no one would suggest using the old router!

If you are trying an old Router, you need to reset it first. Eg. on the Plusnet Hub One this means pressing a ballpoint pen in the reset hole for 30 seconds while power is on, then entering the Password that comes with the Router into your device.
Anyway Good Luck mr_fid - especially with the Lockdown etc. although we have now switched to the Post Office, I tried contacting their Tech Support but it was closed as their Hours were reduced.
We will probably switch back to Plusnet again in 12 months time. It's like Car Insurance we have to Switch to get a good deal or haggle