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.

Similar Messages

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.

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
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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.

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

Very high noise margin even after line re-wiring

Hi
I'm having some building work done at my house, and as part of it they first of all moved some old phone wiring, which meant the phone line was dreadful (on voice you could frequently not get a connection and when it worked would be very noisy). The internet as a result became ridiculously slow, to the point of being unusable. Subsequently, the line has been re-wired and the master socket moved such that it is about a foot of new cable from the incoming line to the new socket. All seems well on the voice front, but while the upstream bandwidth has moved a bit (to 1090kbps), downstream is still 258kbps.
The noise margin on downstream seems huge at 31db, which I assume is the problem:
15:18:29, 19 Nov.
( 832.450000) DSL noise margin: 5.90 dB upstream, 31.00 dB downstream
15:18:28, 19 Nov.
( 831.760000) DSL line rate: 1090 Kbps upstream, 286 Kbps downstream
so I'm wondering if this will automatically reset, or does someone need to do something at the BT end to reset it? I had booked an engineer to come and look at the line but I imagine this will in fact be a waste of time? I've tried multiple filters, plugging straight into the test socket, multiple routers and so on to no avail. There are no phone extensions or indeed anything plugged into the phone but the modem at the moment.
thanks
Pete
Solved!
Go to Solution.

Thanks everyone for helping, left it alone and the router seemed to kick the connection this morning by itself and all is well:
11:51:32, 21 Nov.
(161214.830000) DSL is up
11:51:30, 21 Nov.
(161213.120000) DSL noise margin: 6.60 dB upstream, 8.20 dB downstream
11:51:29, 21 Nov.
(161212.110000) DSL line rate: 1072 Kbps upstream, 18008 Kbps downstream
11:51:02, 21 Nov.
(161184.470000) DSL is down after 2672 minutes uptime
11:51:02, 21 Nov.
(161184.470000) ETHoA is down after 2672 minutes uptime
11:51:01, 21 Nov.
(161184.110000) PPPoA is down after 2672 minutes uptime [Waiting for Underlying Connection (WAN DSL - Up)]
11:50:57, 21 Nov.
(161180.010000) PPP LCP Send Termination Request [User request]
Phew!
Thanks
Pete

Constant brief disconnects - high noise margin? Pl...

Hi. Desperately seeking some help, this problem is driving me mad.
Every evening when using my XBOX360, my connection is dropping from time to time. The middle light either disappears and reappears or goes yellow, flashes for a bit, then ultimately comes back. It doesn't generally stay off long but the effect it's having is that I lose connection to the game (NHL 11) and get credit for a disconnect loss.
I've spent countless hours on this to no avail. I've done all the usual tricks and nothing. I then spent a while reading every thread before posting this just in case -- seems there's 1 or 2 others who've experienced some similar things. 1 thing I will do is email the mods to ask if my line can be changed to fast as I've read that may help a gamer like me. I also read that the noise margin should be in the 6 region while mine currently sits at 2.5x that amount.
I'd REALLY appreciate some help here. I'll pay it forward however I can; heck, I'd pay good money to get this **bleep** problem fixed.
Line state
Connected
Connection time
0 days, 00:40:03
Downstream
11,998 Kbps
Upstream
888 Kbps
ADSL Settings
VPI/VCI
0/38
Type
PPPoA
Modulation
G.992.5 Annex A
Latency type
Interleaved
Noise margin (Down/Up)
14.9 dB / 14.6 dB
Line attenuation (Down/Up)
17.0 dB / 6.2 dB
Output power (Down/Up)
18.0 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)
15 / 0
CRC Errors (Down/Up)
1 / 0
HEC Errors (Down/Up)
1 / 0
Error Seconds (Local/Remote)
1 / 0

Thanks for replying. I have moved the Home Hub to at least five different areas, all in good space and free of any interference. I've had it in my window, in my hallway and also raised high in my living room. It hasn't made any difference. I've tried every possible means I can think of or that I've read. I actually just this second got disconnected again. Think it lasted about 40 minutes this time.
Here are the new stats:
Line state
Connected
Connection time
0 days, 00:02:57
Downstream
11,847 Kbps
Upstream
888 Kbps
ADSL Settings
VPI/VCI
0/38
Type
PPPoA
Modulation
G.992.5 Annex A
Latency type
Interleaved
Noise margin (Down/Up)
15.0 dB / 14.1 dB
Line attenuation (Down/Up)
16.9 dB / 6.2 dB
Output power (Down/Up)
17.8 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 / 15
CRC Errors (Down/Up)
0 / 110
HEC Errors (Down/Up)
0 / 0
Error Seconds (Local/Remote)
0 / 6

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’.

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

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 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 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
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Frequent SNR drops and high error rates

Heya all,
As of the past few days, I've been having issues with my BT Infinity 2 connection suffering from long periods where the SNR drops, and error rates increase. I've contacted support on the phone, but sadly unless I'm using a Home hub, they won't help me, and I don't have one to use. I've offered to provide them with any information they require by email, but they say it's not possible to send them anything. They've tried several line tests and they insist that everything is fine with the line, and that I must have faulty hardware on my end.
For a bit of history; I've had this connection since March 2012. When it was first set up, I was getting no interleaving down or up, and I was getting over the 40/10 I was quoted. A few months later, I was given an upgrade to 80/20. The interleaving remained at 0 both directions, and latency was around 12ms to bbc.co.uk (as an example). As time went on, errors began to show in my modem logs, the speed began to drop, interleaving kicked in, and the latency has increased. I called them about it originally, and an engineer came out. They replace the face plate, gave us a new modem, and issues an line reset. This solved the problem completely for a few months. Around 2 months later, the same things began to happen again. I called support again, but this time, I was outside of my contract period, so they effectively refused to help unless I was using their Home Hub thing, and blamed my equipment. Since this last call, things have steadilly got worse, until recently when the SNR drops began to occurr...
All I want is my connection how it was when I first changed to 80/20, with no interleaving. Nothing has changed in my flat since the connection was installed. There have been issues with street lighting and roadworks in the past, but I believe these were resolved. I suspect that there is a fault with either our line down to the distribution box downstairs (BT's responsibility) or the wire from there to the cabinet (Ashton-under-Lyne, Cabinet 6) (also BT's responsibility). I would ask for an engineer to come out, but I know they won't find a problem (even though there is clearly one there) and I'll get charged for a call-out, and still have my problem! What can I do to try and get it back to how it was?
Asn additional note, there's a neighbor of mine around the corner who's got the same product, going to the same cabinet, and they don't have any of these problems.
This is the current state of my connection as of 2014/07/17 09:47:35:
http://brins0.net:5555/~mhisani/vdsl/2014-07-17/ConnectionStats-2014-07-17-09.47.35.txt
Here are a few graphs of the SNR when these drops have occurred:
There are many days worth of stats here to browse:
http://brins0.net:5555/~mhisani/vdsl/
Hardware:
Modem: Huawei HG612v3b
Router: Asus N66U (Tomato v1.28)
Faceplate: NTE5 (Mk2 SSFP)
No extensions
no bell wire
no phones plugged in
Line to modem is under 1m long
If there's any other information, at all, which will help diagnose my problem, please let me know and I'll do my best to provide it.
Please help!

Can you try the above mentioned program in order to monitor the errors on your line ? You should be able to tell as and when the errors start to increase dramatically which in tirn, can make it easier to narrow down any problems.....
I don't suppose you have a plasma TV ?
If you found this post helpful, then please click the star on the left, after all, I'm only trying to help........

BT high noise margin

For four months since they done the Migration my internet has gone slow upload has gone up a bit download has gone down to half if not more had two eng out and they all say the same noise level is fine the fault is at the exchange (WELL FIX THE STUPID FAULT THEN ) Getting fed up with paying near on £40 a month spending half my life talking to call centres just to find out if i have it plugged into the master socket ( YES IT IS ) then they clear the fault of there system saying fixed wait 10 p*****g days.

did you ever manage to get your noise margin down and get on to adsl2+ rather than adsl2?
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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

Line dropping and high Noise margin follwing Excha...

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