In reply to a post by MrSaffron:

1. Check that speeds are not improved when using the test socket, reason being some homes have extensions people forget about
2. If using a flat profile cable with RJ11 plugs then a twisted pair cable (round profile) might help to stop some noise creeping in locally e.g. https://amzn.to/2RXWPt1
3. If you've been switching off/on a lot i.e. a few times a day then you might have triggered DLM that will slow you done for stability and if you leave alone and line behaves you might see speeds increase after some weeks/months

NOTE: I have two lines perhaps 100m longer, but with a better cabinet (Huawei) but on one I can only get 17 Mbps, the other is at the higher end of the range at 27 Mbps.

1) Test socket???
2) Already using
3) Been a few reboots over the last day or two, but before than no, I'm not a regular rebooter

Test socket

https://www.thinkbroadband.com/assets/guides/orderin...

i.e. socket that you find underneath the small removable part of the master socket.

The procedure for unlocking and getting stats from the Huawei HG612 is described here.

You con't need a router connected to the modem just to get the stats.

OK, so I have my new tp-link TD-W9970 modem in place. Still getting the same speeds, so it hasn't improved anything in that respect.

How can I get stats of the new modem to share with you guys?

I also unscrewed the face plate to see the test socket underneath, but I don't have an adapter to plug my rj11 cable into the bt test socket

Does this mean anything?

DSL

Yes, it reveals a lot.

The downstream is very heavily banded/capped at 15Mb but should get nearer 35Mb (or about 31-32Mb if interleaving is active).

Call the ISP immediately and report the line as banded/capped by DLM.

This takes months and months to remove on its own, if ever.

This is almost always caused by multiple disconnections in a short time period. Restarting modems over and over or turning the power on/off during works etc are a common cause.

And if the line is allowed to sync freely - looks like it will outperform expectations by some margin.

I've had lines go banded before, and have not pestered anyone, but just left things alone i.e. not fiddled with modem and you do after a month or two see the speed coming back.

Last time this happened was what drove me to get the TP-Link W9970 I use, and it took my 'good' line from the 17 under the cap to its 27 Mbps today.

So try the ISP, and if no traction then just keep an eye on the router stats. Something to watch out for is the SNR margin dropping a lot lower when its dark, if that is happening then we know why the line is banded, i.e. probably was unstable before due to noise fluctuations.

In reply to a post by sobeitjedi:

I also unscrewed the face plate to see the test socket underneath, but I don't have an adapter to plug my rj11 cable into the bt test socket

You just need a micro-filter.