Line speed

[#1]

I've had a new line put in for Plusnet FTTC, I can see DLM made a positive bump in download sync speed going from 50 to 53 and lowering noise margin. Before the bump my real world speed was approx 47 due to overheads etc. This morning my real world speed is still 47 despite the change in modem sync. This points to a mismatch between the reported sync speed and my ip profile or account profile at Plusnet? I've looked online and people talk about being able to see your line speed on your Plusnet account, I can't find this option anywhere, can someone point me to it? If that option is outdated and doesn't exist on the account I'm assuming that over time Plusnet will pick up on the increased bump in sync speed?

[#2]

This points to a mismatch between the reported sync speed and my ip profile or account profile at Plusnet? I've looked online and people talk about being able to see your line speed on your Plusnet account, I can't find this option anywhere, can someone point me to it? If that option is outdated and doesn't exist on the account I'm assuming that over time Plusnet will pick up on the increased bump in sync speed?

The Plusnet profile (Current line speed) is no longer used on the majority of connections, it only exists now on accounts with a static IP. There is still a BT IP Profile and it could well be that hasn't caught up with the change in sync speed.

[#3]

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@JHarland wrote:

I've had a new line put in for Plusnet FTTC

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Does that imply that this is a new Plusnet account, or a line upgrade to an existing account ?.

I ask, because Plusnet run two routes through their network, "high touch" and "low touch".

The "current line speed" you are looking for is associated with the "high touch" network.

"high touch" is typically for legacy accounts, or those that have a static WAN IP address (before they became unavailable).

Most customers, have a dynamic WAN IP address, and are on the "low touch" network, so "current line speed" doesn't apply.

Therefore if your new line is on account that was started in since 18-Dec-2024, then you'll be on a dynamic address.

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[#4]

It's an old account (since may) but I was having disconnects and the attenuation would go crazy high and noise margin drop to 0. Openreach came out in the week and hooked me up to a new physical copper line

[#5]

Static IPs have not been available since the end of last year. 

[#6]

I'm assuming over the next few days it will catch up and reflect my increase in sync speed, my download noise margin is only at 5.1 so I'm hopeful the line stays stable and it drops to the max target of 3 with a corresponding increase in download sync speed. Roll on full fibre being available in my area....😂

[#7]

@JHarland  it could be that the slightly faster re-sync rate was coincident with increased depth interleaving, which due to the increased transmission overheads, could mean that your real world (speed test) bandwidth remains about the same.

On my FTTC connection, my modem either syncs around 76Mbps on FASTPATH (no interleaving), or 80Mbps with interleave depth of 8,  but the IP profile and therefore the useable bandwidth is more or less in the same ballpark.

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[#8]

That is a possibility as I have noticed a slight increase in ping? Before the higher sync point was approximately 8ms my nearest speedtest server, now it's consistently 11/12, that would fit with increased interleaving depth?

[#9]

Yes, increased interleave depth, does typically raise ping latency by a few ms with each step (1, 8, 16, etc).

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@JHarland wrote:

I'm assuming over the next few days it will catch up

No, if you have only had the account since May 2025, then there is nothing to catch up, your line is what it is.

FWIW, for the 17 years I was on Plusnet ADSL and FTTC, with as static IP via the "high touch" routing,

my "current line speed" was always quick to drop to a lower speed due to short term poor weather conditions,

but NEVER 'updated' to a higher speed when the DLM sync speed recovered - I ALWAYS had to get staff to manually update it.

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@JHarland wrote:

Roll on full fibre being available in my area....😂

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Same here, fortunately for me on Wednesday, Openreach closed a nearby road for a week, while they lay new FTTP ducting cables under the carriageway,  I also received an email notification from Openreach saying that they are now building in my area.

[#10]

Lucky you! My post code has recently updated on the openreach availability checker from "before December 2026" to "coming in the next year" so that's progress!?

[#11]

How did you get staff to update it? Just phone in and ask for the profile to be refreshed to match the modem sync speed?

[#12]

I used to send a 'Private Message' via this forum to staff members who I knew would be sympathetic to my request,

and include a screenshot of the BTW IP Profile to substantiate my request,  unfortunately that is no longer available !.

Other customers on here have said that they had success with "current line speed" updates by phoning in to Plusnet support.

[#13]

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@JHarland wrote:

Roll on full fibre being available in my area....😂

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Have you signed up to receive Openreach build notifications for your address ?

Go to - https://www.openreach.com/fibre-broadband 

Enter your postcode and address, then [Check Availability]

on the result page in the 'Full Fibre Broadband' box, click on the [Keep Me Updated] button, and provide your email info.

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[#14]

I'll wait to see out the full DLM observation period as I would expect the noise margin to drop to 3 and the sync speed to increase further, once it hits that I'll contact Plusnet and get them to refresh the profile their end, saves me contacting them a number of times

[#15]

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@JHarland wrote:

I'll wait to see out the full DLM observation period as I would expect the noise margin to drop to 3 ...

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If you're doing that, perhaps post here a screen shot of your router's line stats,

for what it looks like today, and again after 10 days of DLM settling time. 

I believe the screen you are looking for has this header -

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