HI after a bad session of errors and disconnects + an unusable phone line we got it fixed , but 10 days later the DLM has not altered the IP profile even though the line has been stable with low errors . I'm stuck on a 2.7 profile and max down stream is 4700 I know it's not a huge difference but when my connection is so low every little helps . Cheers
Normally ADSL does recover on its own, as that is what I assume you have. It does require that you do not restart or disconnect your router for at least 10 days.
If after 10 days the connection speed has not improved, then a single disconnection of the DSL input for about 10 seconds, normally causes the connection to re-sync at the correct speed.
The IP profile can take a few days later to improve.
Dry a single disconnect of the DSL input, to force a resync. Do not restart router as that causes a longer disruption.
See if the line connection speed improved.
The BT Wholesale Performance tester, always seems to give odd results on my ADSL connection, so I just use other speed test sites.
I use a TP Link modem/router and find ADSL very stable.
I am surprised there is an issue on the EO cable, unless its in a joint where the cable pairs split. A contact on the MDF is a possibility, but would be easily found.
EO cables were often used to serve factories, and tend to get re-used if the site is re-developed.
My ADSL connection is about 10Mbs, as I am about 1.5Miles from the exchange. There is VDSL available, however I prefer to have a connection coming from equipment in the exchange (MSAN) which comes from the Essential Services mains supply, as opposed to some batteries in the cabinet, as we do tend to suffer from random power cuts, so I have mains backup at this end.
I assume you have considered 4G mobile broadband, provided you have mobile coverage. I have a 4G router on Three mobile, as an alternative connection, especially if I need a faster upload speed.
I have a TP Link TD- W9970 for ADSL and a TP Link TL-MR8400 LTE router for 4G. This is a full featured device which allows port forwarding as well, as I use remote monitoring.
I chose Three Mobile because they offer a routable IPv4 address option, as I do not think EE offer that, which is probably why your Wi-Fi calling did not work, as I think CGNAT (Carrier Grade Network Translation) may prevent it, due to a shared IP address, meaning your network cannot be addressed from the Internet.
For wireless distribution I use the TP Link Deco M4 mesh, with four nodes. I also use TP Link Kasa and Tapo smart devices. Their stuff is very reliable.