The OP doesn’t have g.Fast on his line. He has FTTC. Top sync is 80/20

Opps.

Tired brain

I think this is the OP's question:

My question is:- does VDSL use the highest possible frequencies it can which have a lower SNR so that more distant connections can get good rate on lower frequencies?

and I think the answer is no. I think the line optimisation system deals with individual lines and does not try to "trade off" one line's settings with another. This sounds like "vectoring" which I'm pretty sure has not been rolled out by Openreach.

In reply to a post by Eeeps:

I get 5ms to bbc.co.uk so I guess I'm on Fastpath.

Fastpath ?, maybe, but not conclusive.
I'm on 80/20 FTTC with interleave depth = 8 (i.e. NOT fastpath), and just pinged bbc.co.uk @ 5.089ms.

In reply to a post by Eeeps:

My question is:- does VDSL use the highest possible frequencies it can which have a lower SNR so that more distant connections can get good rate on lower frequencies?

I wonder whether viewing your modem's VDSL tone bits/BIN graph would reveal anything interesting regarding the frequencies used ?.
Unfortunately the TD-W9970 appears to not include the tone graph in it's GUI, but Grok suggests that it's possible (but slightly tedious) to enable Telnet on the the TD-W9970 to allow a nearby PC running RouterStats, to plot the tone graphs.

This sounds like "vectoring" which I'm pretty sure has not been rolled out by Openreach.

A handful of Openreach cabinets do have vectoring enabled.
What criteria was used to decide that it would be deployed on a particular cab I know not. Unless you had prior knowledge, that the line was vectoring enabled would be mentioned in the notes .. but the usual sign was graffiti on the inside of the cab door . Written to stop engineers thinking they were on a faulty DSLAM port due to the greatly increased time to gain sync.

Back when I was on a VDSL2 connection, I also had a solid 80/20 connection. With a max attanable of around 100mbps.

It sucks they dont let the line run as fast as it can but they dont do that as it would cause more support calls due to unstable conections etc etc

In reply to a post by Zarjaz:

A handful of Openreach cabinets do have vectoring enabled.
What criteria was used to decide that it would be deployed on a particular cab I know not.

Possibly a response to a lot of reports of poor speeds/low SNRs due to crosstalk in the cabling to the customer premises connected to a particular cabinet, but I have no idea how comprehensive the OR data on such things would be.

It's a bit of a vague memory but I believe vectoring was used in some rural areas with long D-side lines to reach a particular download speed required by the installation contract, presumably BDUK deployments. Not sure of the figure but so called superfast speeds of 25 or 30Mbps seem likely.

Edited by Realalemadrid (Mon 27-Oct-25 14:55:41)

In reply to a post by rippedcotton:

In reply to a post by Zarjaz:

A handful of Openreach cabinets do have vectoring enabled.
What criteria was used to decide that it would be deployed on a particular cab I know not.

Possibly a response to a lot of reports of poor speeds/low SNRs due to crosstalk in the cabling to the customer premises connected to a particular cabinet, but I have no idea how comprehensive the OR data on such things would be.

I was experiencing some unexplained drops even with what seemed to be a very good line.

So I tried connecting the modem directly to the 'test socket' and was surprised to see a 2.5dB improvement in downstream margin and about 8Mb/s in the max rate.
The socket is about 3 years old and the pins on the PCB that mate with the test socket are simply tinned.

I reckon my line could easily provide a stable 100Mb/s if allowed!

I've unclipped the plastics in the NTE5C faceplate and removed the PCB.
The faceplate cover is now back in place with the wire feeding out through one of the lower cut-outs.

Stats are now ...


Upstream Downstream
Current Rate (kbps) 19999 79999
Max Rate (kbps) 34069 107919
SNR Margin (dB) 14.9 8.6
Line Attenuation (dB) 6.8 4.5