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Low line speed compared to router Max Data Rate

Posts: 2
Registered: ‎16-09-2016

Low line speed compared to router Max Data Rate



Two related questions:


1. Is there a reason why my line speed has dropped while my Router Max Data rate has crept up?

My line rate has dropped down to ~28Mbps from 30+, while my Max data rate as reported by the router is 33Mbps.

Am I now stuck on a profile that limits me to ~28Mbps despite the router max rate?


2. Why has the BT line speed estimate dramatically increased while my line speed has dropped?

I had an engineer out to fix a previous low speed problem and at that point accepted that due to the external line distance/quality I was probably going to be at the low end of the previous line speed estimate.

That range was previously 27-39Mbps and I was getting about 28-30Mbps.

Since then I have swapped the PN HubOne for a BT HH5B, which has gained me about +3Mbps, so a line speed of 30-33Mbps.

Since about 1 week ago two things have happened:


The estimated line speed is shown as:

Phone exchange:LYMINGTON

Estimated line speed:51Mb (This may vary between 35Mb and 51.1Mb) - Checked on 2016-09-09 17:37:59

Current line speed:27.2 Mb


AND the drop in line speed covered by question 1.


I had left it connected for at least three days to see if it would improve. I Have not seen any disconnections that were not due to me rebooting, moving or disconnecting the router; or power cuts last night in the storms we had on the south coast.

Max Data Rates from HH Helpdesk summary page, currently showing:

3. Firmware version:
4. Board version:
5. VDSL uptime: 0 days, 00:34:21
6. Data Rate: 2000 / 27972
7. Maximum Data Rate: 6866 / 33486
8. Noise Margin: 16.3 / 6.4
9. Line Attenuation: 37.3 / 25.8
10. Signal Attenuation: 0.0 / 0.0


Have done speed test:


1. Best Effort Test: -provides background information.

  Download Speed
  26.41 Mbps
0 Mbps 27.08 Mbps
Max Achievable Speed


 Download speedachieved during the test was - 26.41 Mbps
 For your connection, the acceptable range of speedsis 18.95 Mbps-27.08 Mbps .
 Additional Information:
 IP Profile for your line is - 27.08 Mbps

2. Upstream Test: -provides background information.

  Upload Speed
  1.84 Mbps
0 Mbps 2 Mbps
Max Achievable Speed


Upload speed achieved during the test was - 1.84Mbps
 Additional Information:
 Upstream Rate IP profile on your line is - 2 Mbps

We were unable to identify any performance problem with your service at this time.
It is possible that any problem you are currently, or had previously experienced may have been caused by traffic congestion on the Internet or by the server you were accessing responding slowly.
If you continue to encounter a problem with a specific server, please contact the administrator of that server in the first instance.


Have done diagnostic test.


Posts: 2
Registered: ‎16-09-2016

Re: Low line speed compared to router Max Data Rate

An update.


Logged as a fault. PN response is no fault found.

Since then my Data rate has dropped further and is now 25Mb/s. Hub Max data is steadily increasing.

Following a Hub restart:

5. VDSL uptime: 0 days, 00:15:43
6. Data Rate: 2000 / 24997
7. Maximum Data Rate: 6926 / 34319
8. Noise Margin: 16.5 / 7.3
9. Line Attenuation: 37.2 / 25.6


Looking at my OOKLA speed test results for the last 2-3 months shows my transition from ADSL to a faulty fibre connection limited to 20Mb/s, the fix by the engineer resulting in 30+Mb/s, the Plusnet outage followed by a steady decline! Coincidence?