This topic

What speed should I reasonably expect?

Scrums — Thu, 03 Sep 2020 17:34:20 GMT

These are my broadband checker results:

Telephone Number xxxxx on Exchange WALTHAMSTOW is served by Cabinet 4

Featured Products Downstream Line Rate(Mbps) Upstream Line Rate (Mbps) Downstream HandbackThreshold(Mbps) WBC FTTC Availability Date WBC SOGEA Availability Date Left in JumperHigh Low High Low VDSL Range A (Clean)
VDSL Range B (Impacted)

36.2	22.4	7.6	5.9	18.1	Available	Available	--
35.5	19.1	7.6	5.2	15	Available	Available	--

Featured Products Downstream Line Rate(Mbps) Upstream Line Rate (Mbps) Downstream Range (Mbps) Availability Date FTTP Install ProcessFTTP on Demand

330

Available

ADSL Products Downstream Line Rate (Mbps) Upstream Line Rate (Mbps) Downstream Range(Mbps) ADSL Availability Date WBC SOADSL Availability Date Left in JumperWBC ADSL 2+WBC ADSL2+ Annex MADSL MaxWBC Fixed RateFixed Rate

Up to 8	--	6 to 10	Available	Available	--
Up to 8	Up to 0.5	6 to 10	Available	Available	--
Up to 2.5	--	2 to 5.5	Available	Available	--
2	--	--	Available	Available	--
2	--	--	Available	--	--

Observed Speeds VDSLMax Observed Downstream SpeedMax Observed Upstream SpeedObserved Date

16.49

5.2

2020-08-22

Other Offerings Availability DateVDSL MulticastADSL Multicast

Available

Premise Environment StatusBridge TapVRINTE FacePlateLast Test Date

20-08-2020

These are my current hub stats (I have a Fritzbox 7590):

Negotiated Connection Properties

Receive Direction Send Direction

Max. DSLAM throughput	kbit/s	16496	10000
Min. DSLAM throughput	kbit/s	128	-
Attainable throughput	kbit/s	22626	5753
Current throughput	kbit/s	16486	5753
Min. effective data rate	kbit/s	16439
Seamless rate adaptation		off	off

Latency		1 ms	fast
Impulse Noise Protection (INP)		33	0
G.INP		on	off

Signal-to-noise ratio	dB	10	6
Bitswap		on	on
Line attenuation	dB	27	29
approximate line length	m	918

Profile	17a
G.Vector		off	off

Carrier record		J43	J43

BT wholesale Performance Test Results Report
Basic Performance Test -
Time Stamp Latency Download Upload
Monday 31 August 2020 | 9:58:34 19 Ms 15.25 Mbps 5.29 Mbps
Advanced Performance Test -
Download Test
Download speed achieved during the test was 15.25 Mbps
For your connection, the acceptable range of speeds is 11.16-15.94 Mbps
Your DSL Connection Rate: 0 Mbps(DOWN-STREAM),0 Mbps(UP-STREAM)
For your connection, the maximum achievable download speed is 15.94 Mbps
IP Profile for your line is 15.94 Mbps
Upload Test
Upload speed achieved during the test was 5.29 Mbps
For your connection, the maximum achievable upload speed is 10 Mbps
IP Profile for your line is 10 Mbps
Summary Advanced Performance Test -
Result Message
We were unable to identify any performance problem with your service at this time.It is possible that any
problems you have experienced may have been caused by traffic congestion or by a server responding
slowly. Please visit the Speed Test Guidance if you are unable to understand the test results.

As far as I can tell from all these numbers I should be getting more than I am getting now, 16,486. Can anyone see anything in any of these numbers that suggests that that would not be possible?

I would really appreciate some feedback.

Re: What speed should I reasonably expect?

imjolly — Thu, 03 Sep 2020 18:15:33 GMT

from what you have posted I would hope to get near your attainable speed which is bottom end of the expected range. The one stat missing is dsl connection time. From the high noise margin of 10db it suggests you are or have been having connection problems with router dropping connection maybe often. If you can get a stable connection then DLM should reduce noise margin giving more speed but could take quite a few weeks

is there any line noise. Dial 17970 option 2 should be silent and best with corded phone

Re: What speed should I reasonably expect?

Scrums — Thu, 03 Sep 2020 18:40:56 GMT

Hi it is interesting that you say 10 DB is a high noise margin. Apparently a problem was fixed on my line somewhere outside yesterday. When they told me it was fixed the noise margin was 13 DB. It has gradually returned to 10. I have read that a noise margin of less than 6 is problematic but anything higher is not. My router help files states " The higher the value, the better the signal transmission."
Nevertheless I haven't noticed any dropouts either as 'user' or looking in the Internet logs on my router.
I will need to dig out our corded phone as it is a long time since we've used it 🙂

Re: What speed should I reasonably expect?

imjolly — Thu, 03 Sep 2020 18:45:04 GMT

The optimal noise margin is 6db reducing to 3db if G.INP is activated by DLM. Your connection speed will increase as and when you can get noise margin down to 6db which will happen when DLM sees your stable connection

Re: What speed should I reasonably expect?

Scrums — Thu, 03 Sep 2020 19:01:21 GMT

Sorry but I'm still confused. Again quoting the help file for my router:
"The signal-to-noise ratio is a value for the quality of the DSL signal. The higher the ratio, the more stable the DSL connection."

Re: What speed should I reasonably expect?

licquorice — Thu, 03 Sep 2020 19:59:18 GMT

The figure quoted is signal to noise MARGIN, which is the amount of margin your signal to noise ratio has. DLM will attempt to set your speed to give a margin of 3dB, if your line is unstable at that it will lower your speed to increase the margin until you have stable line.

Re: What speed should I reasonably expect?

Scrums — Fri, 04 Sep 2020 07:48:43 GMT

Okay assuming I do the noise test on my line and find a problem, I will raise a fault with BT to get that fixed.

I would hope then that the SNR lowers and as a result my speed increases. Is that a fair assumption?

What I'm asking really is does this work in both directions? If the line is noisy, the DLM lowers my speed. My line becomes healthier will the DLM automatically raise my speed, or do I have to ask someone at BT to do this?

My router is already configured for maximum performance in this area:

Re: What speed should I reasonably expect?

pippincp — Fri, 04 Sep 2020 07:56:14 GMT

Yes, DLM works both ways and is totally automatic.

Re: What speed should I reasonably expect?

licquorice — Fri, 04 Sep 2020 07:56:48 GMT

Yes, if your line is audibly noisy, report it as a noisy line don't mention broadband. DLM is a continuous automatic process that monitors your line to give optimum speed and stability.

Re: What speed should I reasonably expect?

imjolly — Fri, 04 Sep 2020 07:59:46 GMT

if you find you have a noisy line then that will interfere with your broadband causing DLM to increase noise margin and reduce connection speed. when you get your line fixed and rid of the noise then DLM will reduce noise margin back to normal 6db (3db if G.INP active) and your connection speed will increase. However although this is an automatic process it can take DLM a few week of stable connection before DLM starts to take any action

Re: What speed should I reasonably expect?

Scrums — Fri, 04 Sep 2020 11:19:24 GMT

Sorry to be a pest but I have another question. Why is the SNR higher at the receive line than the send? You may have already answered this but I'm not sure. Does it have something to do with GNIP?

PS still trying to find the phone

Re: What speed should I reasonably expect?

Carlusha — Fri, 04 Sep 2020 11:27:03 GMT

@Scrumswrote:
PS still trying to find the phone

Argos are doing a simple corded phone for £6.99 which can be collected from a nearby Sainsburys if required.

I gave up searching for ours!

Re: What speed should I reasonably expect?

imjolly — Fri, 04 Sep 2020 11:28:25 GMT

this may help with G.INP

https://kitz.co.uk/adsl/retransmission.htm

the first stage is to check for line noise and if present report phone fault

Re: What speed should I reasonably expect?

Scrums — Fri, 04 Sep 2020 13:24:05 GMT

We found the phone 🙂 As I am disabled (MS) I will have to wait for my husband to remove faceplate to get to the master socket. And I am working from home so will have to wait until 5.

I have just received a filter and yesterday received a BT Smart Hub 2. We will have to replace our Fritzbox with that. It seems that neither Openreach engineers or people that I speak to at BT are at all happy that we are not using BT equipment.And by the way the Number to test the line is 17070 not 17970 🙂

Re: What speed should I reasonably expect?

Scrums — Sat, 05 Sep 2020 07:25:42 GMT

Faceplate removed and replaced with filter to master socket
Quiet line test from master socket was quiet. We'll test again around midday.
SNR according to router stats downstream is now 8, occasionally dropping to 7
Attainable throughput has dropped to 19,000
Synch speed is still the same (unsurprisingly). According to BT wholesale performance tester my IP Profile is 15.94 Mbps
2 errors when reconnecting to DSL. PPPoE error: Timeout.
I haven't plugged in the BT smart hub yet. Will do this if I need to contact BT about a fault

I don't know whether the PPPoE error: Timeout errors are something I need to contact BT about. Regardless, I plan to leave everything as is for a while to see whether anything improves, unless of course any of you suggest otherwise.

Re: What speed should I reasonably expect?

Scrums — Sat, 05 Sep 2020 10:11:49 GMT

I gave in and connected the BT hub. I was in a chat with someone at BT and they would not help me until I connected the BT hub as expected.

Here are the current connection stats from that hub:

DSL uptime:0 days,00 Hours25 Mins08 Secs

Data rate:5.719 Mbps / 16.496 Mbps
Maximum data rate:5.719 Mbps / 18.840 Mbps
Noise margin:6.5 / 7.9
Line attenuation:11.5 / 24.1
Signal attenuation:11.5 / 34.9

I am using this hub basically to provide Internet and my Fritzbox is still acting as my router. I wanted this setup because the Fritzbox has so much more telephony functionality and I had already set up all the IP reservations on that box. Also I have a couple of devices that will not connect to wireless while 5G is enabled. I didn't want to go through all that setup again…

Anyway the girl at BT said that there is a fault on my line between my flat and the Cabinet. An engineer is coming on Monday morning.

Re: What speed should I reasonably expect?

Scrums — Sat, 05 Sep 2020 13:47:27 GMT

I have seen these errors in the log on the BT hub:

PPP IPCP Receive Configuration NAK

I assume these are errors as the N stands for negative

perhaps these are related to the PPoE errors I was getting on my other device?

Re: What speed should I reasonably expect?

imjolly — Sat, 05 Sep 2020 13:59:33 GMT

your connection speed is still below your expected range so hopefully engineer on monday will be able to at least get connection speed with range. just try and maintain a stable connection until engineer visit on monday

Re: What speed should I reasonably expect?

Scrums — Sat, 05 Sep 2020 14:03:42 GMT

Hopefully 🙂

Re: What speed should I reasonably expect?

Scrums — Mon, 07 Sep 2020 20:17:57 GMT

Engineer came today and spent hours fixing my line. It was also clear to me from the TR69 logs on the BT device that he was also resetting my broadband limits. I now have a current throughput of 18+ Mbps, both SNR values are 6. Max DSLAM throughput is now 55,000, it was 16,486.

Tired now. Will leave it for a while and see how it settles down.I'm just glad to see the back of that constant 16,486.

Thanks everybody for your help and advice. 🤗