Broadband speed slow, high noise margin

This is my first time posting on the forums here and I would just like to report an issue with the connection I have, I live right at the end of the main phone line on a farm and have never had a good connection but recently the speeds have become appalingly slow and I dont understand what is causing it. Here are the stats of the line:
Very slow as you can see.
Here are the advanced options when doing the ping test which state that the maximum download speed is 0.25, which I don't understand as the day before I had 0.50. I asked a friend who said it was likely a noise issue so here are the stats for that:
I'm unfamiliar with what these stats mean but my friend who used to work for BT said my noise ratio is to high and would cause caps on my connection. I'm at a loss as to what to do and would appreciate any help on what may be causing this and any ways to fix it. As a bit of background I switched from AOL to BT a month ago due to infernally slow internet speeds, after a brief spell where the speeds under BT were good they suddenly went back to these levels again, I have spoken to BT staff over the phone who have reset the line twice which causes a brief spike in performance then it goes back to this level. Any help would be appreciated and thankyou for your time.

Hi Paul_Mastrangelo,
With a line attenuation of 70.9dB your landline is approx 5.1km long from your property to your local exchange.
With a line attenuation of 70dB you may not be able to get a broadband connection much over 1mbps or even much over 0.5mbps as your line is just too long in distance from your property to the exchange.
I also see your on Adsl2, nice too see such a long line that can atleast support it, mine can't 
As Keith and imjolly has said, it is recommended to keep the homhub/router connected 24/7 and constantly connected especially for those with longer lines as any slight upset to the sync rate can cause an effect to the speed.
You may also be interested in this here: http://goo.gl/MNb8s
It's about providing superfast broadband for rural communities and to areas with slow broadband speeds.
Hope that helps,
Cheers
EDIT
PS: The quite line test is when you dial 17070 from your landline phone and select option 2 called Quite line test. There should be no noise (such as crackling, hissing, popping, etc...) but a slight hum on a cordless phone is normal.
I'm no expert, so please correct me if I'm wrong

Similar Messages

  • Low speed - very high noise margin

    Hi,
    I'm looking to see if someone could resolve my connection issues. About a fortnight ago my broadband connection kept cutting out until I restarted the router, then the connection appeared fine (indeed, I was able to download 18GB that day). The following day, however, the noise margin was set much higher and the IP Profile was restricted to just over 1,000kbps.
    The problem got worse as my housemate kept restarting the router in a bid to get the speed back to normal (normal being about 8Mbps). As a result, for the past week the speed has been at 575kbps.
    There was no crackly interference when I tried the 17070 quiet line test and the stats I've attached to the bottom of this post are with the line plugged into the test socket:
    Previous to plugging in the test socket, the stats were very similar - speed of 575kbps, noise margin in the 40s, and something like 40 'FEC down' events over the past three days.
    There are now no other phoneline devices connected in the house at present (there was a landline phone which had been plugged in to another room, but was removed as a potential solution to the broadband speed problems).
    Is it possible that a BTCare mod might be able to reset the noise margin to something more manageable?
    Thanks in advance.
    Line state:
    Connected
    Connection time:
    0 day, 00:14:20
    Downstream:
    575 Kbps
    Upstream:
    440 Kbps
    VPI/VCI:
    0/38
    Type:
    PPPoA
    Modulation:
    G.992.5 Annex A
    Latency type:
    Interleaved
    Noise margin (Down/Up):
    46.6 dB / 29.6 dB
    Line attenuation (Down/Up):
    21.5 dB / 9.9 dB
    Output power (Down/Up):
    0.0 dBm / 12.1 dBm
    FEC Events (Down/Up):
    0 / 0
    CRC Events (Down/Up):
    0 / 0
    Loss of Framing (Local/Remote):
    0 / 0
    Loss of Signal (Local/Remote):
    0 / 0
    Loss of Power (Local/Remote):
    0 / 0
    Loss of Link (Remote):
    0
    HEC Errors (Down/Up):
    0 / 0
    Error Seconds (Local/Remote):
    0 / 0
    Solved!
    Go to Solution.

    Hi
    As John46 has said, you have been put into a banded profile automatically by the exchange equipment as the exchange has detected a multiple loss of connections (eg resyncs) over a period of time due to disconnections between the hub and the exchange.
    The system (dlm) will automatically release you from the banded profile after 3 to 5 days of a stable connection. Though your speed may take some time to recover.
    This is automatically done to prevent errors and to stabilise the line.
    As your on ADSL2+ your IP Profile will be 88.2% of connection speed, as your connection speed gets better and out of the banded profile your IP Profile will immediately change automatically.
     It is advised to keep the homehub/router switched on constantly and connected 24/7, as any restarts/disconnections or turning off of the router/homehub will make the dlm think there is a problem with your line and will either increase your noise margin, decrease your IP Profile, decrease your sync rate or put you into a banded profile.
    This is done automatically to stabilise the line.
    If you are not released from the banded profile in 3/5+ days then come back here and we can look into the issue further. If needed you can get manual be released from the banded profile (if not automatically already done so) by the BT Care Team then come back here, but you will need to have a 3+day stable connection first.
    Hope that helps,
    Cheers
    I'm no expert, so please correct me if I'm wrong

  • Slow connection speed but high noise margin

    My internet connection is slow (approx 0.5 mbit) and my noise margin seems exessive. How do i get this sorted?
     Download speedachieved during the test was - 0.44 Mbps
     For your connection, the acceptable range of speeds is 0.05 Mbps-0.5 Mbps.
     Additional Information:
     Your DSL Connection Rate :0.58 Mbps(DOWN-STREAM), 0.29 Mbps(UP-STREAM)
     IP Profile for your line is - 0.5 Mbps
    Connection Information
    Line state:
    Connected
    Connection time:
    14 days, 09:12:55
    Downstream:
    576 Kbps
    Upstream:
    288 Kbps
    ADSL Settings
    VPI/VCI:
    0/38
    Type:
    PPPoA
    Modulation:
    G.992.1 Annex A
    Latency type:
    Fast
    Noise margin (Down/Up):
    26.1 dB / 25.0 dB
    Line attenuation (Down/Up):
    53.9 dB / 30.0 dB
    Output power (Down/Up):
    16.4 dBm / 12.0 dBm
    FEC Events (Down/Up):
    0 / 1
    CRC Events (Down/Up):
    186 / 454

    when was the last time you renewed your BT contract?  looks like an old half meg connection.  if so you need to renew your contact and get moved to adslmax
    If you like a post, or want to say thanks for a helpful answer, please click on the Ratings star on the left-hand side of the post.
    If someone answers your question correctly please let other members know by clicking on ’Mark as Accepted Solution’.

  • Line dropping and high Noise margin follwing Excha...

    Hi guys.
    Back again for my biannual problem solving session. So heres my story. Our internet went off last Thursday for 10 minutes or so followed by an email letting us know that our local exchange had been upgraded, then began the problems. Incidentally, inicially I wa over the moon, my speed had increased to a blistering 10.8 Mbps.
    From then on, whenever we mad eor received a phone call our broadband would drop out. I made the usual call to India, mive the hub etc etc but to no avail. eventually I decided to buy and change the micro filters. This worked, great, but why did I have to do this? Why did my filters no longer work?
    I had hoped that would be the end of it, still at regular intervals, the BB is dropping out and reconnecting, each time it reconnects, the HH2 is syncing at a lower speed and the Noise margin is increasing. Only slowly but it is very irritating. We have gone down from 10.8 to just over 9Mbps. Where will it end? Anyhoo, I have spoke to India again and they are looking into it.
    Any ideas/comments? Here are my stats.
    ADSL line status
    Connection information
    Line state
    Connected
    Connection time
    0 days, 9:28:53
    Downstream
    10,883 Kbps
    Upstream
    1,112 Kbps
    ADSL settings
    VPI/VCI
    0/38
    Type
    PPPoA
    Modulation
    ITU-T G.992.5
    Latency type
    Interleaved
    Noise margin (Down/Up)
    8.7 dB / 5.7 dB
    Line attenuation (Down/Up)
    35.0 dB / 18.5 dB
    Output power (Down/Up)
    0.0 dBm / 12.7 dBm
    Loss of Framing (Local)
    0
    Loss of Signal (Local)
    0
    Loss of Power (Local)
    0
    FEC Errors (Down/Up)
    0 / 4294967264
    CRC Errors (Down/Up)
    672 / N/A
    HEC Errors (Down/Up)
    N/A / 0
    Error Seconds (Local)
    360
    Solved!
    Go to Solution.

    Just leave it alone, it will sort itself out after a few days, its best not to get the helpdesk involved, as there is nothing wrong with your connection, its just the normal period of settling in when the tline is upgraded.
    Its best not to restart or disconnect it for at least 10 days, otherwise you will end up with a much slower speed.
    ADSL2+ is uses more bandwidth, so its important to keep the distance from the point where your line comes in, to the home hub, as short as possible, and have a filter at the point it enters the house, so that the broadband signal does not go down the extension wiring.
    The ideal solution is a filtered faceplate at the master socket, that will ensure that you get the fastest connection speed.
    Like this http://forumhelp.dyndns.info/images/adslface.jpg
    or this
    http://forumhelp.dyndns.info/images/newnte.jpg
    Some of the older microfilters are not as effective at stopping the higher frequency ADSL2+ signals from getting into your phone circuit, which is most likely why you were asked to change them.
    There are some useful help pages here, for BT Broadband customers only, on my personal website.
    BT Broadband customers - help with broadband, WiFi, networking, e-mail and phones.

  • Slow Broadband, high noise margin.

    Hello,
    Recently I've been having some broadband issues. I'm on the 8mb package and have received these speeds for months.
    Last week, the download dropped to 6.5 downstream, and then has since slowly gone lower. It is now sitting at 3.375 and just won't rise.
    I've tried calling BT but the person on the other end of the line just isn't interested, they just spout the usual 'reset the router... okay there's nothing we can do'.
    So, the line has been stable for over 3 days since the last phone call to BT and the router stats are below:
    ADSL Line Status
    Connection Information
    Line state:
    Connected
    Connection time:
    3 days, 19:45:42
    Downstream:
    3.375 Mbps
    Upstream:
    448 Kbps
    ADSL Settings
    VPI/VCI:
    0/38
    Type:
    PPPoA
    Modulation:
    G.992.1 Annex A
    Latency type:
    Interleaved
    Noise margin (Down/Up):
    21.9 dB / 25.0 dB
    Line attenuation (Down/Up):
    29.6 dB / 15.5 dB
    Output power (Down/Up):
    19.2 dBm / 12.3 dBm
    FEC Events (Down/Up):
    281971 / 22
    CRC Events (Down/Up):
    263 / 16
    Loss of Framing (Local/Remote):
    0 / 0
    Loss of Signal (Local/Remote):
    0 / 0
    Loss of Power (Local/Remote):
    0 / 0
    HEC Events (Down/Up):
    970 / 9
    Error Seconds (Local/Remote):
    318 / 179
    BT Wholesale speedtest:
     Download speedachieved during the test was - 2.8 Mbps
     For your connection, the acceptable range of speeds is 0.6 Mbps-7.15 Mbps.
     IP Profile for your line is - 2.5 Mbps
    I've done a quiet line test and it's silent.
    Pretty much at the end of my tether with BT, we pay £55 per month for phone and 8mb broadband (Yes, daylight robbery). 
    The service and support are both completely horrendous.
    Can anyone here be of any help? It'd be greatly appreciated.

    I tried the test socket, went to 7.75~
    Put it back in the line next to my computer and it was 7.4~ (I assume due to the disconnections?)
    It then disconnected when I put my faceplate back on the master socket and it' now:
    Connection Information
    Line state:
    Connected
    Connection time:
    0 days, 00:00:36
    Downstream:
    5.813 Mbps
    Upstream:
    448 Kbps
    ADSL Settings
    VPI/VCI:
    0/38
    Type:
    PPPoA
    Modulation:
    G.992.1 Annex A
    Latency type:
    Interleaved
    Noise margin (Down/Up):
    8.8 dB / 25.0 dB
    Line attenuation (Down/Up):
    29.7 dB / 15.5 dB
    Output power (Down/Up):
    20.1 dBm / 12.2 dBm
    FEC Events (Down/Up):
    0 / 0
    CRC Events (Down/Up):
    0 / 0
    Loss of Framing (Local/Remote):
    0 / 0
    Loss of Signal (Local/Remote):
    0 / 0
    Loss of Power (Local/Remote):
    0 / 0
    HEC Events (Down/Up):
    0 / 0
    Error Seconds (Local/Remote):
    22 / 8
    Any way to get it back to 7+ again, or just to leave it?

  • High Noise Margin - Inconsistent Speed

    Hi,
    I had an issue between a month and two months ago, involving poor broadband speeds. This was eventually resolved after a line issue was detected and connection speeds are now better. However, when checking the noise margin through my homehub, the downstream noise margin is still much higher than before the fault (from reading other forum posts, I gather it should be around 6dB, whereas it ranges from 15dB - 17dB).
    Download speeds also fluctuate frequently since the fix. This is more noticeable when I am using a platform such as Steam to download a larger file. Before the line fault, download speed was constant, and normally around 1.1 Mbps. Now, however, it varies anywhere from 200 Kbps to 900 Kbps and never remains constant for more than 2 or 3 seconds.
    I have pasted the connection status page from my homehub below. Although the connection time shows 2 days, this was due to a restart I performed to see if it affected the line performance. Before this, I had 19 days continuous connection. A speedtest from speedtester.bt.com shows 5.67 Mbps download, 0.84 upload and 28.63 ping. Again, this is not as good as before the first line issue occurred.
    Line state:
    Connected
    Connection time:
    2 days, 16:37:59
    Downstream:
    6,607 Kbps
    Upstream:
    1,195 Kbps
      ADSL settings
    VPI/VCI:
    0/38
    Type:
    PPPoA
    Modulation:
    G.992.5 Annex A
    Latency type:
    Fast
    Noise margin (Down/Up):
    15.3 dB / 5.9 dB
    Line attenuation (Down/Up):
    36.5 dB / 21.3 dB
    Output power (Down/Up):
    0.0 dBm / 12.5 dBm
    FEC Events (Down/Up):
    0 / 0
    CRC Events (Down/Up):
    1276 / 183
    Loss of Framing (Local/Remote):
    0 / 0
    Loss of Signal (Local/Remote):
    0 / 0
    Loss of Power (Local/Remote):
    0 / 0
    Loss of Link (Remote):
    0
    HEC Errors (Down/Up):
    1526 / 113
    Error Seconds (Local/Remote):
    0 / 157
    Is there any reason why these issues are still occurring?
    Thanks,
    Ben

    Hi,
    Thanks for the quick replies!
    I have tried the quiet line test and there is no noise whatsoever on the line.
    I have tried the test socket previously, but am currently trying it again. The downstream speed has risen slightly, but the noise margin remains unchanged. I have restarted the homehub twice since connecting to the test socket, and it has currently been connected to the test socket for around half an hour altogether (in between homehub restarts).
    I have posted a screenshot from the BT speedtester in the next post.
    Here are the connection details from the home hub:
    Line state:
    Connected
    Connection time:
    0 day, 00:07:36
    Downstream:
    7,703 Kbps
    Upstream:
    1,183 Kbps
      ADSL settings
    VPI/VCI:
    0/38
    Type:
    PPPoA
    Modulation:
    G.992.5 Annex A
    Latency type:
    Fast
    Noise margin (Down/Up):
    15.1 dB / 6.1 dB
    Line attenuation (Down/Up):
    36.5 dB / 21.3 dB
    Output power (Down/Up):
    0.0 dBm / 12.4 dBm
    FEC Events (Down/Up):
    0 / 0
    CRC Events (Down/Up):
    6 / 0
    Loss of Framing (Local/Remote):
    0 / 0
    Loss of Signal (Local/Remote):
    0 / 0
    Loss of Power (Local/Remote):
    0 / 0
    Loss of Link (Remote):
    0
    HEC Errors (Down/Up):
    15 / 0
    Error Seconds (Local/Remote):
    0 / 0
    Thanks,
    Ben

  • High noise margin, low speed and repeated drop out...

    Hi - I have a Home Hub 3 which is always dropping the connection.  Unfortunately it gets re-booted alot as this seems to be the only way to get things moving again.  I have just ordered a new router/modem to ss if that will hold the connection better but have been reading these forums and see that the Line Status and Speedtest are a good place to start.  My Line Status shows a noise margin of 17.7dB - could this be my problem?
    ADSL Line Status
    Connection Information
    Line state:
    Connected
    Connection time:
    0 days, 03:09:09
    Downstream:
    7.781 Mbps
    Upstream:
    448 Kbps
    ADSL Settings
    VPI/VCI:
    0/38
    Type:
    PPPoA
    Modulation:
    G.992.1 Annex A
    Latency type:
    Fast
    Noise margin (Down/Up):
    4.3 dB / 22.0 dB
    Line attenuation (Down/Up):
    33.6 dB / 17.5 dB
    Output power (Down/Up):
    19.8 dBm / 11.7 dBm
    FEC Events (Down/Up):
    0 / 2
    CRC Events (Down/Up):
    3000 / 5
    Loss of Framing (Local/Remote):
    0 / 0
    Loss of Signal (Local/Remote):
    0 / 0
    Loss of Power (Local/Remote):
    0 / 0
    HEC Events (Down/Up):
    1907 / 1
    Error Seconds (Local/Remote):
    794 / 6
    Speed Test data via BT Wholesale site
    D/L speed 3.78  
    U/L Speed 0.23  
    Ping Latency 68.38
    and via BT domestic speed test
    D/L Speed 5.74
    U/L Speed 0.20
    Connection Speed 7.97
    Do you think noise is my problem and any suggestions please!!
    Many thanks in advance
    Andrew

    Ha - many thanks the quick reply but I am un-masked already as not having a clue what I am talking about! A few hours spent reading up on things before I posted was not enough! I am plugged in to the test socket - have just done the quiet line test on 17070 from a corded phone and there is no noise. A bit of history - 18 months ago we had issues with water damage to underground lines to the house and we are now on the last usable pair (?) at that time I had all extension wiring reoved and new Master socket fitted. We have been OK but not spectacular since - we struggle to have 3 computers running off the net at times and I dont beieve we are getting anywhere close to our expected speed and then recently we have experienced drop outs and really slow speed as mentioned in original post.

  • High Noise Margin

    Hi there,
    It seems like my line has been changed to a different profile with the Downlink Noise Margin Target being set to 10dB.
    I'd like to have it back to 6dB as before.  I've lost over 0.6Mbps and my speeds weren't exactly that high to begin with!
    Many thanks!
    1. Product Name: HomeHub4
    3. Firmware version: v0.07.01.0910-BT (Type B) Last updated 21/1/2015
    4. Board version: 01A
    5. DSL uptime: 3 days, 09:19:23
    6. Data Rate: 711 / 2203
    7. Maximum Data Rate: 724 / 2404
    8. Noise Margin: 5.5 / 10.3
    9. Line Attenuation: 35.0 / 51.5
    10. Signal Attenuation: 34.9 / 55.8
    11. Data sent/received: 192.8 MB / 3.9 GB
    13. BT Wi-fi: No
    14. 2.4GHz wireless network/SSID: BTHub4-Z6FQ
    15. 2.4GHz wireless connections: Enabled (802.11 b/g/n (up to 144 Mb/s))
    16. 2.4GHz wireless security: WPA & WPA2 (Recommended)
    17. 2.4GHz wireless channel: Automatic (Smart Wireless)
    18. 5GHz wireless network/SSID: BTHub4-Z6FQ
    19. 5GHz wireless connections: Enabled (802.11 n (up to 300 Mb/s))
    20. 5GHz wireless security: WPA2 Only
    21. 5GHz wireless channel: Automatic (Smart Wireless)
    22. Firewall: Default
    23. MAC Address: 18:
    24. VPI/VCI: 0/38
    25. Modulation: G.992.3(ADSL2)
    26. Latency type: Fast
    27. Software variant: -
    28. Boot loader: 0.4.3-BT (Mon Jun 9 14:23:56 2014)

    Hi HaoForNow,
    Thanks for posting and welcome back!
    Sorry for the connection problems you were having with your broadband.  Great to see everything has been stable over the last 3 days.  I'll help reset the profile to reduce the noise margin and push your connection speed in the right direction ^^^ 
    Click on my username and under the "about me" section of my profile you'll see the link to send us your details.
    Cheers,
    Robbie
    BTCare Community Mod
    If we have asked you to email us with your details, please make sure you are logged in to the forum, otherwise you will not be able to see our ‘Contact Us’ link within our profiles.
    We are sorry that we are unable to deal with service/account queries via the private message(PM) function so please don't PM your account info, we need to deal with this via our email account :-)
    If someone answers your question correctly please let other members know by clicking on ’Mark as Accepted Solution’.

  • Broadband Speed slowed to a crawl all of a sudden

    Hi,
    My broadband speed is currently 0.04mbps according to speedtest.net, I have been unable to complete the BT speed test because it is so slow, I get the following error:
    "We haven't been able to complete the speed test at this time.
    This may be due to a problem with the speed tester, or your line may be running very slowly."
    I have disconnected all other devices and closed any application using the internet on my PC. I can confirm nothing else on my PC is using the connection because I am monitoring the traffic.
    All I can give you is my router stats:
    ADSL Line Status
    Connection Information
    Line state:
    Connected
    Connection time:
    5 days, 18:58:00
    Downstream:
    15.43 Mbps
    Upstream:
    1.14 Mbps
    ADSL Settings
    VPI/VCI:
    0/38
    Type:
    PPPoA
    Modulation:
    G.992.5 Annex A
    Latency type:
    Fast
    Noise margin (Down/Up):
    6.7 dB / 6.2 dB
    Line attenuation (Down/Up):
    25.2 dB / 11.7 dB
    Output power (Down/Up):
    20.4 dBm / 11.8 dBm
    FEC Events (Down/Up):
    0 / 0
    CRC Events (Down/Up):
    121762 / 32
    Loss of Framing (Local/Remote):
    0 / 0
    Loss of Signal (Local/Remote):
    0 / 0
    Loss of Power (Local/Remote):
    0 / 0
    HEC Events (Down/Up):
    239648 / 7
    Error Seconds (Local/Remote):
    2171 / 0
    Thanks

    Hi Reed_Richards,
    The OP was trying to use the BT Retail speedtester (http://diagnostics.bt.com/login/?workflow=Speed) which does sometimes not work if the throughput speed is to slow.
    The BT Wholesale speed tester at http://speedtest.btwholesale.com should work though.
    @remondo,
    As well as what Reed_Richards and I have said, is there any known issues at your local exchange? Check via these websites:
    1) http://bt.custhelp.com/app/answers/detail/a_id/15036
    2) http://btbusiness.custhelp.com/app/service_status
    3) http://usertools.plus.net/exchanges/? 
    4) http://usertools.plus.net/exchanges/mso.php 
    Cheers
    I'm no expert, so please correct me if I'm wrong

  • Can anyone help? High noise margin and low sync sp...

    Hi all,
    just registered on the forum so this is my first post. Hopefully someone out there can help.
    I transferred my broadband to BT from Sky. With Sky my sync speed was around 4000kbps and download of about 3500kbps. I had a Netgear router with Sky but for some reason every day or so  my sync speed dropped to 2500kbps and download down to 1800kbps. I had to reboot the router to get the speeds back up again, very frustrating.
    I got BT broadband on 20/1/2010, set everything up and also fitted an I-plate. I noticed that line attenuation was 46db, this was previously 50.5 with sky and prior to I plate. The home hub sync was at 7200kbps at the start which i was very pleased with. I know this DLM thing is active for the first 10 days or so and speedtests during this time are not exactly accurate but still I was happy. after 3 days i did a speed test and got download of 5800kbps, chuffed to bits!
    But, after 2 days at that speed the sync dropped to 2176kbps, gutted. I have only rebooted the router 3 times since the service started and each time the sync goes back to 7000kbps ish but drops again a day later. The thing I dont understand is the noise margin. Its currently at 24.5db, isnt that awfully high? Why is this? when I reboot it drops to 8-9db ish but then goes up again with the speed dropping.
    currently connected to test socket, no other telephone equipment connected to any extensions
    Can anyone please help/advise whats going on or how to rectify it? I'm wondering if theres a line fault somewhere.
    And with attenuation at 46db I would have thought the speed could well be much higher than 2200kbps.
    I'll stop babbling now,
    Thanks

    whitesp wrote:
    Thanks for your reply Somerled,
    ok so something is causing noise at a particular time, i had wondered about the quality of the home wiring, there are 4 extension sockets in the property, but again i am currently only connected to the test socket.
    I dont have the old netgear router unfortunately so can't follow up on the suggestion you made.
    God this is gonna be a nighmare to track down, although come to think of it I do have a dimmer on quite close to where the master socket is.
    Can we say for sure that there definitely IS a source of noise/interference??
    Many thanks
    SOMETHING is forcing a resync, and at a low speed. The only thing that would cause that is a prolonged burst of noise.This is known to BT technicians as "REIN" (Repetitive Electrical Impulsive Noise). No point trying to get BT to investigate at this stage though, as it sounds very intermittent.
    The way to spot radio interference noise is to use a suitable receiver - and the most convenient is a portable medium wave transistor radio. Tune to a quiet spot at the lowest end of the scale, and turn up the volume. All you'll hear is white noise and the occasional quiet crackle. A burst of noise strong enough to affect the DSL signal will be unmistakeable - a LOUD crackling/buzzing/rasping noise.  If that coincides with a resync, you've found it. You then have to figure out what electrical device caused the noise.....
    Another possible source of DSL noise problems is less obvious -  noise caused by a line fault. This causes an unwanted mixing of the phone and DSL signal in a way that can't be corrected by the filters. This will have much the same effect as external interference noise.
    Check this : does the router resync when the phone rings, or when the phone is in use ?  If it does, then we're on to something - a fault known as an "HR" (High Resistance). If that doesn't happen, then we are back to external radio interference as the cause.
    I suppose the HV lines you mention might have some effect, but it's a bit of a long shot. I'd expect noise from them would be a bit more constant, and would cause problems all the time, rather than intermittently.

  • Very variable speeds. High noise. Should I follow ...

    On a good day my MaxADSL broadband gives me 6.5Mbps. On a bad day, like to day, it can be closer to 2Mbps. So far, it's never dropped low enough to give me V04 errors on BT Vision. And for working from home it's not a problem as my speeds are always better than theirs as the office is in a very rural location!
    However, I do have a lot of noise on the line:
    Line state
    Connected
    Connection time
    8 days, 12:30:50
    Downstream
    8,128 Kbps
    Upstream
    448 Kbps
    VPI/VCI
    0/38
    Type
    PPPoA
    Modulation
    ITU-T G.992.1
    Latency type
    Interleaved
    Noise margin (Down/Up)
    12.9 dB / 22.0 dB
    Line attenuation (Down/Up)
    21.0 dB / 11.5 dB
    Output power (Down/Up)
    19.8 dBm / 12.1 dBm
    Loss of Framing (Local)
    0
    Loss of Signal (Local)
    0
    Loss of Power (Local)
    0
    FEC Errors (Down/Up)
    4639 / 33
    CRC Errors (Down/Up)
    1 / 2147480000
    HEC Errors (Down/Up)
    nil / 19
    Error Seconds (Local)
    1
    And these figures don't seem to vary when I move my HH2 to the master socket (which is inconveniently located above a doorway!). Although I've only ever had it there for 10 minutes or so - does it need to be there longer to establish the correct noise levels?
    I use BBTalk as my primary phone. I received a call today and the quality was very poor.
    So my question is should I chase up BT? Do I have a line fault?
    Here's the BT Speedtest results. As always the speed they indicate is much higher than that given by ThinkBroadband.com or Speedtest.net:
    Solved!
    Go to Solution.

    as you are on adslmax and also have max speed and profile I don't think noise margin is a problem but more like what the call margin in hand which is a good thing.  your download on btspeedtester is 5mb and looks ok especially if run today when net could be busy
    If you like a post, or want to say thanks for a helpful answer, please click on the Ratings star on the left-hand side of the post.
    If someone answers your question correctly please let other members know by clicking on ’Mark as Accepted Solution’.

  • Broadband speed slow and drops

    Hi Just got Sky broadband and not really happy with the speed i am getting, it goes between 8 down to 2, really annoying especially when my neighbour can get between 12 & 13!! This is a screen shot of my stats, any ideas?Any help would be appreciated?thanks  PortStatusTxPktsRxPktsCollision PktsTx b/sRx b/sUp TimeWANPPPoE8314311434200002:07:47LANUp609003855503533241686902:09:07WLANUp877686882104668458502:08:44Broadband LinkDownstreamUpstreamConnection Speed10239 kbps670 kbpsLine Attenuation26.0 dB15.5 dBNoise Margin8.3 dB21.21 dB

    I don't know whether or not Sky still do the 10 day line training when your speeds can vary a lot, I thought I'd read on here that they stopped doing it.If they don't do it then your noise margin is too high especially upstream. Lift the phone, press any one number on the keypad and listen for noise on the line hissing or crackling. For a quiet line test dial 17070 option 4 and if you do have noise try plugging just a phone (no filter) into the test socket.If the noise is still there phone Sky and report a line fault (noise) not a broadband fault.

  • High noise margins

    Hi all, (nearly) a first time poster and am having SERIOUS issues with BT Broadband.
    I was with Sky for ages but migrated to BT, I had consistant and steady speeds with Sky of 4.5 to 5.5 mb.
    I had a recent loss of connection (towards the end of my 10 day "settling" period) and the full connection went down soon after and 5 days later re-connected me, the line is noisy to the ear, BT have conducted tests and they say all is fine, I even hear the modem noise connecting if I'm on the phone.
    I've checked all sockets, am using the master(there is no test socket in my box, there is no "bell" line connected). I'm on the Hartlepool exchange so don;t know if that has been recently upgraded to the 21CN, if so would this cause any of my problems??
    I've have checked everything at my end that could cause excess noise, have removed phones, Sky+box etc.. and still a crappy connection, any ideas guys n gals?? Thanks
    Stats below:
    ADSL line status
    Connection Information
    Line state
    Connected
    Connection time
    0 days, 00:00:31
    Downstream
    575 Kbps
    Upstream
    888 Kbps
    ADSL Settings
    VPI/VCI
    0/38
    Type
    PPPoA
    Modulation
    G.992.3 Annex A
    Latency type
    Interleaved
    Noise margin (Down/Up)
    12.5 dB / 9.6 dB
    Line attenuation (Down/Up)
    49.1 dB / 27.8 dB
    Output power (Down/Up)
    4.4 dBm / 1.3 dBm
    Loss of Framing (Local/Remote)
    0 / 0
    Loss of Signal (Local/Remote)
    0 / 0
    Loss of Power (Local/Remote)
    0 / 0
    FEC Errors (Down/Up)
    0 / 0
    CRC Errors (Down/Up)
    0 / 32
    HEC Errors (Down/Up)
    0 / 0
    Error Seconds (Local/Remote)
    0 / 0

    when you say the line is noisy have you tried the quiet line test preferably with a corded phone in master socket - dial 17070 and option 2 - you should hear nothing
    your exchange has been upgraded to 21CN and you are currently on adsl2 with modulation of 992.3
    If you like a post, or want to say thanks for a helpful answer, please click on the Ratings star on the left-hand side of the post.
    If someone answers your question correctly please let other members know by clicking on ’Mark as Accepted Solution’.

  • Broadband speed slow

    My Broadband speed is nowhere near what is advertised.
    Is there anything I can do to improve things?
    BT Home Hub 3
    ADSL Line Status
    Connection information
    Line state:     Connected
    Connection time:     12 days, 15:45:27
    Downstream:     5,184 Kbps
    Upstream:     448 Kbps
      ADSL settings
    VPI/VCI:     0/38
    Type:     PPPoA
    Modulation:     G.992.1 Annex A
    Latency type:     Interleaved
    Noise margin (Down/Up):     7.8 dB / 17.0 dB
    Line attenuation (Down/Up):     48.5 dB / 31.0 dB
    Output power (Down/Up):     19.3 dBm / 12.6 dBm
    FEC Events (Down/Up):     36918351 / 3940
    CRC Events (Down/Up):     64685 / 3271
    Loss of Framing (Local/Remote):     0 / 11
    Loss of Signal (Local/Remote):     5 / 11
    Loss of Power (Local/Remote):     0 / 0
    Loss of Link (Remote):     0
    HEC Errors (Down/Up):     763004 / 3343
    Error Seconds (Local/Remote):     0 / 0
    Broadband Speed Test
    at 11:20  14th March 2014
    From Exchange    5.18Mb
    At PC Download    4.54Mb
               Upload    0.36Mb
    Quiet Line Test is quiet, no noise.
    Master Socket is where the phone line enters the house.
    Solved!
    Go to Solution.

    welcome to the forum where customers help customers
    your conenction speed appears about what I would expect for someone with an attenuation of 48/49db on adslmax
    your download speed appears consistent with your connection speed suggesting that your ip profile is correct
    check speed here 
    check speed
    If you like a post, or want to say thanks for a helpful answer, please click on the Ratings star on the left-hand side of the post.
    If someone answers your question correctly please let other members know by clicking on ’Mark as Accepted Solution’.

  • Fault rectified, but still high Noise margin and a...

    Hi, I had a fault on my dropwire from the pole causing crackling on the line, of which caused my broadband to drop constantly and increase my noise margin to 13db, from the previous 6db. This caused my broadband speed to drop from 2.5Mb down to 1.05. The engineer when he replaced the drop wire and replaced my socket with a new Openreach one with a built in filter (the infinity one) said I just need to phone BT and get put through to second level support who can drop the target SNR. After many many many phonecalls to bt technical, they refuse to drop my target snr, and refuse to pass me on to second level support who can action this! Can anyone help me on here, as my fuse is getting very short!
    Current Line Stats : 
    ADSL Line Status
    Connection Information
    Line state:
    Connected
    Connection time:
    0 days, 00:10:01
    Downstream:
    1.156 Mbps
    Upstream:
    448 Kbps
    ADSL Settings
    VPI/VCI:
    0/38
    Type:
    PPPoA
    Modulation:
    G.992.1 Annex A
    Latency type:
    Interleaved
    Noise margin (Down/Up):
    13.4 dB / 8.0 dB
    Line attenuation (Down/Up):
    63.0 dB / 31.5 dB
    Output power (Down/Up):
    16.8 dBm / 11.9 dBm
    FEC Events (Down/Up):
    185 / 2
    CRC Events (Down/Up):
    19 / 5
    Loss of Framing (Local/Remote):
    0 / 0
    Loss of Signal (Local/Remote):
    0 / 0
    Loss of Power (Local/Remote):
    0 / 0
    HEC Events (Down/Up):
    44 / 0
    Error Seconds (Local/Remote):
    4 / 1

    ADSL Line Status
    Connection Information
    Line state:
    Connected
    Connection time:
    4 days, 06:03:56
    Downstream:
    1.188 Mbps
    Upstream:
    448 Kbps
    ADSL Settings
    VPI/VCI:
    0/38
    Type:
    PPPoA
    Modulation:
    G.992.1 Annex A
    Latency type:
    Interleaved
    Noise margin (Down/Up):
    11.5 dB / 8.0 dB
    Line attenuation (Down/Up):
    62.8 dB / 31.5 dB
    Output power (Down/Up):
    16.6 dBm / 11.9 dBm
    FEC Events (Down/Up):
    1289 / 719
    CRC Events (Down/Up):
    131 / 14
    Loss of Framing (Local/Remote):
    0 / 0
    Loss of Signal (Local/Remote):
    0 / 0
    Loss of Power (Local/Remote):
    0 / 0
    HEC Events (Down/Up):
    234 / 6
    Error Seconds (Local/Remote):
    118 / 11

Maybe you are looking for