Line attenuation

A while ago I was having problems with my connection dropping out but after some advice from the forum its improved. Now only drops roughly once every 4 days or so even though the noise margin is around 2.7. The thing is I have been told that the line attenuation is what limits the line speed and is set by the distance from the exchange. But my attenuation keeps changing it can be anything from 47 to 49. The modulation always stays at G.992.5 as I know this can effect it. These are my hub stats from just now.
ADSL line status
Connection information
Line state Connected
Connection time 3 days, 19:16:44
Downstream 5,635 Kbps
Upstream 1,060 Kbps
ADSL settings
VPI/VCI 0/38
Type PPPoA
Modulation ITU-T G.992.5
Latency type Interleaved
Noise margin (Down/Up) 2.8 dB / 6.0 dB
Line attenuation (Down/Up) 48.5 dB / 27.0 dB
Output power (Down/Up) 0.0 dBm / 12.9 dBm
Loss of Framing (Local) 0
Loss of Signal (Local) 0
Loss of Power (Local) 0
FEC Errors (Down/Up) 317314834 / 4294967264
CRC Errors (Down/Up) 81068 / N/A
HEC Errors (Down/Up) N/A / 0
Error Seconds (Local) 65611
Cheers for any help.

I am surprised that the error second reset themselves, that normally only happens when the line re-synchs.
FEC errors can normally be ignored, as they are corrected errors. The one to watch is the CRC errors, which indicate uncorrected errors, and will reduce your throughput.
You are operating on a very low noise margin, so a fair number of errors are likely. If the disconnections become a problem, then you can ask for your target SNR to be increased to 6dB.
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

Question about Noise Margin and Line Attenuation a...

1.       For several years I have had a BT telephone line. From the utilities provided by http://www.kitz.co.uk/adsl I find that I am connected to the Exchange at Merton Park (BT Code: LSMEPK) Distance:-   Direct:   960 metres (appx)* By Road: 1.29 km. Exchange Status ADSL enabled: March 30, 2000 DSL Max enabled:   March 30, 2006 SDSL enabled : Enabled 21CN due : (PSTN) N/A 21CN WBC (Broadband)   Enabled 15.02.09
2.       I previously had broadband from UKOnline and used a Speedtouch 570 adsl modem. I was paying £9.99 for a speed of 1MBit/s – in practice 700K – which was fine for most purposes but BBC iplayer did struggle a bit. UkOnline has been taken over by SKY so I switched to BT Total Broadband Option 3 in mid December, and initially used the Speedtouch 570 as there were delivery delays on BT Home Hub 2.0 due to weather conditions. Speed was initially very good but did not measure it.
3.       After Xmas I set up the BT Home Hub and ran a speed test - the profile was 2.5MBit/s. I was disappointed to get less than 3Mbit/s which is needed for BBC iplayer HD.
ADSL line status
Connection information
Line state Connected
Connection time 0 days, 2:26:57 ------> 6th January 2011
Downstream 2,268 Kbps
Upstream 440 Kbps
ADSL settings
VPI/VCI 0/38
Type PPPoA
Modulation ITU-T G.992.5 ---à this apparently means ADSL2+
Latency type Interleaved
Noise margin (Down/Up) 15.7 dB / 31.9 dB
Line attenuation (Down/Up) 27.0 dB / 9.7 dB
Output power (Down/Up) 0.0 dBm / 12.7 dBm
Loss of Framing (Local) 22
Loss of Signal (Local) 3
Loss of Power (Local) 0
FEC Errors (Down/Up) 6512 / 0
CRC Errors (Down/Up) 0 / 2147480000
HEC Errors (Down/Up) nil / 0
Error Seconds (Local) 2
4.       As part of the “slow speed wizard” I looked into getting the accelerator plate for my NTE5 split face master socket available for postage only (£1.20) but the web form advised me that if I proceeded with this order the broadband contract would automatically be extended by 12 months. I checked my BT internet account and was surprised to find an email (23rd Dec 2010) advising me that as an Option *1* customer I was in danger of exceeding my usage allowance – which surprised me as I am definitely Option 3. I wondered if I had had the speed throttled. Therefore phoned BT accounts who said the email was a mistake - I am Option 3, also said that accelerator plate was unlikely to make a difference.
5.       I contacted the BT call centre who talked me through various options. Plugging the hub direct into the master socket made no difference. They also ran a line test and said the line was fine.
6.       I therefore browsed the community care forum and find that disappointing speeds are not uncommon. One of the threads mentioned disconnecting the bell wire on the extensions. I follow this advice and removed line 3 on all extensions and then checked the ADSL status on the hub.
ADSL line status
Connection information
Line state Connected
Connection time 0 days, 6:33:45 10th January 2011
Downstream 2,272 Kbps
Upstream 888 Kbps
ADSL settings
VPI/VCI 0/38
Type PPPoA
Modulation ITU-T G.992.5
Latency type Interleaved
Noise margin (Down/Up) 31.8 dB / 14.4 dB
Line attenuation (Down/Up) 27.0 dB / 9.7 dB
Output power (Down/Up) 0.0 dBm / 12.3 dBm
Loss of Framing (Local) 0
Loss of Signal (Local) 0
Loss of Power (Local) 0
FEC Errors (Down/Up) 0 / 0
CRC Errors (Down/Up) 0 / 2147480000
HEC Errors (Down/Up) nil / 0
Error Seconds (Local) 0
7.       This had a dramatic improvement on Upstream speed – and a big change to the noise margin Noise margin which had been (Down/Up) 15.7 dB / 31.9 dB and is now Noise margin (Down/Up) 31.8 dB / 14.4 dB. It did not improve the download speed.
8.       In the following days the BT hub has not been particularly stable with some intermittent loss of wireless connectivity every few hours. Examining the event log I was a bit disconcerted to see alterations to firewall settings had happened (which I hadn’t made) and resets which I am pretty certain I hadn’t made – and a userid login with a name like TR69. Perhaps these are occasioned by the BT speedtester? To be fair I had reset and powered off the hub a number of times in attempt to sort out this problems.
9.       I have switched to a Netgear DG83GT (V1.03.23) for the time being until I have what I can regard as a reasonably fast stabile connection. At the time of writing this has been stable for 20 hours DownStream Connection Speed 2268 kbps UpStream Connection Speed 888 kbps.As stated earlier I would like downstream to be faster.
The perceived wisdom on the forum seems to be that several days of complete stability are required if there is to be any improvement on speed.
10.   If a moderator or anyone with the relevant experience reads this I would be very grateful for answers to the follow questions:
A.      Is the change in the Noise Margin parameter a good thing or a bad thing?
B.      Are the line attenuation figures acceptable for a distance of under 1.5kilometres to the exchange?
C.      Should I be able in theory to get a faster speed i.e. downstream 3Mbit/s?
D.      From the forum it seems to take several days for speed adjustments to be effected or to take effect – is this a technical issue or a policy issue?
Many thanks.
Robert
Solved!
Go to Solution.

Good Morning - it is now 6 days since this posting. During this time there have been 2 resets of the adsl line
Fri, 2011-01-14 03:28:43 - LCP down.
Fri, 2011-01-14 03:28:54 - Initialize LCP.
Fri, 2011-01-14 03:28:54 - LCP is allowed to come up.
Fri, 2011-01-14 03:28:54 - CHAP authentication success
and
Sun, 2011-01-16 16:37:26 - LCP down.
Sun, 2011-01-16 16:37:36 - Initialize LCP.
Sun, 2011-01-16 16:37:36 - LCP is allowed to come up.
Sun, 2011-01-16 16:37:36 - CHAP authentication success
These were not initiated by me - and since noise margins and sync speeds changed as a consequence can I assume that this is evidence of the adaptive process working?
Secondly, as you can see, the noise ratio has vastly improved as have the upstream and downstream sync speeds
        System Up Time 157:54:52
      ADSL Link          Downstream          Upstream
      Connection Speed           11199 kbps           1091 kbps
      Line Attenuation           27.0 db           9.9 db
      Noise Margin           14.8 db           9.2 db
BUT from the BT speedtester, as shown below I seem to be stuck in a banded IP profile of 1750/1091 which is very different from the downstream sync speeds of 11199 Kbps(DOWN-STREAM)
Can BT staff take action to alter this? If they can how do I contact them?
Regards,
Robert
18th Jan 2010
Download Speed    1288 Kbps
0 Kbps   2000 Kbps
Max Achievable Speed
Download speedachieved during the test was - 1288 Kbps
For your connection, the acceptable range of speedsis 800-2000 Kbps.
Additional Information:
Your DSL Connection Rate :11199 Kbps(DOWN-STREAM), 1091 Kbps(UP-STREAM)
IP Profile for your line is - 1750 Kbps
The throughput of Best Efforts (BE) classes achieved during the test is - 2.28:10.77:87.0 (SBE:NBEBE)
These figures represent the ratio while sententiously passing Sub BE, Normal BE and Priority BE marked traffic.
The results of this test will vary depending on the way your ISP has decided to use these traffic classes.
2. Upstream Test: -provides background information.
Upload Speed       896 Kbps
0 Kbps   1091 Kbps
Max Achievable Speed
>Upload speed achieved during the test was - 896 Kbps
Additional Information:
Upstream Rate IP profile on your line is - 1091 Kbps

Why does my line attenuation change all the time?

Why would my line attenuation have gone from 65dB to 72.3dB? I think there is a bad connection on my line, but BT's test equipment says my line is fine.
1st ADSL Line Status
Connection Information
Line state:
Connected
Connection time:
0 days, 00:52:21
Downstream:
1.372 Mbps
Upstream:
659.6 Kbps
ADSL Settings
VPI/VCI:
0/38
Type:
PPPoA
Modulation:
G.992.5 Annex A
Latency type:
Interleaved
Noise margin (Down/Up):
6.2 dB / 5.8 dB
Line attenuation (Down/Up):
65.0 dB / 43.9 dB
Output power (Down/Up):
15.0 dBm / 12.4 dBm
FEC Events (Down/Up):
113157 / 9145
CRC Events (Down/Up):
421 / 240
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):
1850 / 810
Error Seconds (Local/Remote):
169 / 215
2nd ADSL Line Status
Line state
Connected
Connection time
2 days, 12:34:52
Downstream
928 Kbps
Upstream
446 Kbps
ADSL Settings
VPI/VCI
0/38
Type
PPPoA
Modulation
G.992.5 Annex A
Latency type
Interleaved
Noise margin (Down/Up)
6.2 dB / 11.9 dB
Line attenuation (Down/Up)
72.3 dB / 44.0 dB
Output power (Down/Up)
1.4 dBm / 0.8 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)
5666 / 0
CRC Errors (Down/Up)
442 / 0
HEC Errors (Down/Up)
2257 / 0
Error Seconds (Local/Remote)
87 / 0

I got a reply from the chairmans office
I’ve spoken with BT
Wholesale again today and I’m waiting on a report coming in from the Chief
Engineers Office.
What I’ve
been doing
I’ve also gone
through all the history available of the work that has been done on your line
and can confirm the following:
Your line is
all copper and is on the best E and D side cables available.
We have changed
the network equipment in the exchange on multiple occasions.
And it doesn’t
look like there is any more physical work can be carried out.
The report I’m
waiting for from BT Wholesale is about a known issue that we have had with
certain exchange equipment which is used to make the phone ring when it is
being called and causing the broadband connections to drop, I need this to
confirm if your line is affected by this specific issue.
I think you
have spoke with Donal earlier today and discussed the option of moving onto an
8meg service instead of the upto 20meg, and you told him this has been tried
before and did not work, can you remember roughly when this was so I can check
it with BT Wholesale?
What happens
next
There is still
an engineer on his way out to you tomorrow between 1pm and 6pm. I’m not sure
what this engineer will be able to do given that we have had it confirmed that
you are already on the best lines available but we will see how he gets on and
take it from there. (Might get a nice surprise!)
I’ll give you a
call tomorrow to confirm the update from the chief engineers office and also
see if the engineer has been out on site with you.
Best Wishes
Chris
My reply
Hi,
Thanks for the reply, some of the information in your email isn’t correct.
The D-side is only the “best lines available” because it’s the only one available!
I had the BB disconnecting when the phone rang, long before going on the new equipment.
They have exchanged the network equipment on “multiple occasions”, even though I told them not to bother because I knew it would make no difference.
The facts are:
NO WORK has been done on my D-side (apart from the connections directly outside my property)
Many people that have had the same fault have told me it turned out to be the D-side
I was told by a BT Openreach engineer that they would not do any work on my D-side because part of it was aluminium. But this now turns out not to be true, so I have no idea why they will not do any work on my D-side.
At the cab, the broadband is the correct speed and works fine.
My caller display, often doesn't work. I think this is the same line fault that causes this.
A leakage to earth was detected on my line, but was never fixed.
My phone often rings 2 or 3 times, when I finish a call. I think this is the same line fault that causes this.
When the BB speed goes up, the router records a huge amount of errors.
A few years ago my BB failed altogether, it turned out to be the connection outside my property. The connection was green and in bad condition. There are loads more of these connections between my house and the cab, they will be just as old or older.
A BT engineers test equipment detected a change in resistance somewhere on my D-side, I haven’t heard if that was ever looked into.
Every piece of evidence points at a bad connection on my D-side, so you can see why I will not rest until I know that all the connections have been replaced. BT wholesales answer of “that there is nothing wrong with your line” just isn’t good enough because the fault still exists.

Line Attenuation - New Install

Hi there,
I had a new BT line installed last week into a new build house and BT Total Broadband Option 3 activated today. While checking out my connection details I noted the following information from the router:
Downstream: 1 Mbps
Upstream: 448 Kbps
Modulation:G.992.1 Annex A
Latency type:Fast
Noise margin (Down/Up):3.2 dB / 12.0 dB
Line attenuation (Down/Up):66.6 dB / 31.5 dB
Output power (Down/Up):15.7 dBm / 12.5 dBm
CRC Events (Down/Up):1087 / 33
HEC Events (Down/Up):512 / 1
Error Seconds (Local/Remote):682 / 34
The Line attenuation worried me the most as when placing the order with BT, they estimated I should be able to receive 13 Mbps, not the current 1 Mbps I have.
I understand that the BT line needs to "Sit" for 10 days, but surely the line attenuation isn't going to suddenly drop and give me the speed that was advertised?
The exchange is over 5km away, but has been enabled for FTTC and the nearest street cabinet is just around the corner from the house.
I'm wondering if the engineer connected the new line directly to the exchange rather than the street cabinet. (Unless I'm mistake on how they can connect a new line).
Can anything be done? I'm going to give tech support a ring tomorrow, but wanted to ask here in the meantime.
Thanks for your patience.

Thanks for the reply.
The checker came back with the following results:
"For Telephone Number 028******** on Exchange WARINGSTOWN
Your exchange is ADSL enabled, and our initial test on your line indicates that your line should be able to have an ADSL broadband service that provides a fixed line speed up to 512Kbps.
However, due to the length of your line, an engineer visit may be required, who will, where possible, supply the broadband service.
Our test also indicates that your line currently supports a fibre technology with an estimated WBC FTTC Broadband where consumers have received downstream line speed of 13.8Mbps and upstream line speed of 4.6Mbps."
So Fibre is available, so I'm confused why I seem to be only getting 1Mbps with such an awful Attenuation rate.
I'll e-mail the mods as suggested, is there anything I can do if I speak to BT today? (I really want to get this moving if another engineer is required as it took nearly 2 months notice to book one last time)
Thanks

High line attenuation

I had BT Broadband activated on 30th June and am coming to the end of the "settlement" period. However, the connection has never been above 352kbs(downstream). I am connected directly into a Broadband ADSL master socket which a BT Engineer fitted at the end of 2005 when I was told I would not be able to receive Broadband at the time. I re-ordered with BT last month to establish whether I could now receive broadband before trying alternatives (satellite, wifi etc).
As shown in the stats below, I have a very high line attenuation of 79.6db - (I am located in rural west Wales). From the BT Wholesale ADSL Checker it advised I would get a broadband line speed of 1Mbps on ADSL Max. Estimated line length being 5.0km(direct), 8.2km (by road).
Basically, is there any way of improving my connection speed based on these stats or should I cancel with BT and explore alternatives.
Connection Information
Line state:
Connected
Connection time:
4 days, 01:39:19
Downstream:
256 Kbps
Upstream:
320 Kbps
ADSL Settings
VPI/VCI:
0/38
Type:
PPPoA
Modulation:
G.992.1 Annex A
Latency type:
Interleaved
Noise margin (Down/Up):
8.1 dB / 7.0 dB
Line attenuation (Down/Up):
79.6 dB / 31.5 dB
Output power (Down/Up):
13.8 dBm / 12.2 dBm
FEC Events (Down/Up):
88913 / 2511
CRC Events (Down/Up):
243 / 449
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):
421 / 257
Error Seconds (Local/Remote):
124758 / 53899
9th July BT Speedtester 11.15am
Test1 comprises of Best Effort Test: -provides background information.
Download Speed
107 Kbps
0 Kbps
250 Kbps
Max Achievable Speed
Download speed achieved during the test was - 107 Kbps
For your connection, the acceptable range of speeds is 50-250 Kbps.
Additional Information:
Your DSL Connection Rate :256 Kbps(DOWN-STREAM), 320 Kbps(UP-STREAM)
IP Profile for your line is - 135 Kbps

Hi Welcome a few points the checker is an estimate only and your attenuation 79.6 you are actually at the extreme edge of broadband service changing suppliers would make no difference and cancellation would be expensive
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SNR & Line Attenuation

Hi
I am a new broadband customer.
I think the SNR and Line Attenuation are at the limits of what is acceptable. Please could you advise if there is anything that can be done to improve these.
Downstream
Upstream
SNR Margin
6.5
23.0
db
Line Attenuation
50.5
29.5
db
Data Rate
5664
448
kbps
Max Rate
6112
1112
kbps
POWER
19.5
12.0
dbm
CRC
633
2

there is nothing wrong with the stats you posted. attenuation is dependent on your line length from the exchange so will fluctuate 1 amybe 2db but unless you move it should be pretty constant your noise margin ( it is snrm shown by router) is about the normal of 6db
you actually have a good connection speed for your attenuation check here
check speed
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If someone answers your question correctly please let other members know by clicking on ’Mark as Accepted Solution’.

Very high line attenuation on new connection with ...

Hi,
I got BT broadband yesterday and I've been having slow speeds (2mbit down, 7mbit at best) - only now have I found out about banding - I've reset the router twice in the last daydays. I realise I should wait 3 days for it to settle down/escape banding.
My worry is the line/signal attenuation:
It seems very high - should I be worried? I'm 0.3 miles as the crow flies to my exchange (in central london) and my previous flat 200 meters down the road (further from the exchange) got 19.5mbit down. I also have another ADSL socket in my flat on the other side of the room to this one. Is there a way to tell if it's the master socket?
Is it worth trying out the other socket at this point? I'm scared that disconnecting my broadband again will put my firmly into banding hell.
My expected speed is 17.5mbit to 20mbit. My full WAN log is here: http://pastebin.com/A61gBCH3. Interesting log lines:
09:11:59
06 Sep. DSL Link Up: Down Rate=7003Kbps
Up Rate=299Kbps; SNR Margin Down=6.0dB
Up=6.4dB
18:54:45
05 Sep. DSL Link Up: Down Rate=2567Kbps
Up Rate=187Kbps; SNR Margin Down=6.0dB
Up=7.7dB
18:52:59
05 Sep. DSL Link Up: Down Rate=18527Kbps
Up Rate=1235Kbps; SNR Margin Down=6.1dB
Up=6.7dB
17:54:08
05 Sep. DSL Link Up: Down Rate=2711Kbps
Up Rate=199Kbps; SNR Margin Down=5.9dB
Up=7.9dB
17:47:06
05 Sep. DSL Link Up: Down Rate=3203Kbps
Up Rate=208Kbps; SNR Margin Down=6.0dB
Up=7.9dB
17:37:15
05 Sep. DSL Link Up: Down Rate=5699Kbps
Up Rate=335Kbps; SNR Margin Down=3.2dB
Up=7.2dB
17:19:35
05 Sep. DSL Link Up: Down Rate=4579Kbps
Up Rate=248Kbps; SNR Margin Down=3.3dB
Up=6.3dB
00:02:08
01 Jan. DSL Link Up: Down Rate=4555Kbps
Up Rate=251Kbps; SNR Margin Down=3.4dB
Up=6.3dB
17:09:30
05 Sep. DSL Link Up: Down Rate=4288Kbps
Up Rate=244Kbps; SNR Margin Down=3.4dB
Up=6.3dB
I have no landline phone so can't do the quiet line test.
Thanks.
Solved!
Go to Solution.

can you enter your phone number and post results remember to delete number https://www.btwholesale.com/includes/adsl/main.html
can you conenct to the test socket?
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High attenuation on short line

I'm getting what seems to be quite a high attenuation on what should be quite a short line, router stats below.
Hub is connected to the socket after the master but it makes little difference when connected to the test socket. I've tried the quiet line test and there's a little bit of noise, more so after the BB was activated
I'd estimate I'm no more than 1KM from the exchange (I can see it out of my window!)
What do you guys think? Worth investigating or not?
ADSL Line Status
Connection Information
Line state:
Connected
Connection time:
13 days, 04:40:27
Downstream:
9.368 Mbps
Upstream:
1.078 Mbps
ADSL Settings
VPI/VCI:
0/38
Type:
PPPoA
Modulation:
G.992.5 Annex A
Latency type:
Fast
Noise margin (Down/Up):
5.7 dB / 6.5 dB
Line attenuation (Down/Up):
35.5 dB / 20.1 dB
Output power (Down/Up):
20.5 dBm / 11.9 dBm
FEC Events (Down/Up):
0 / 0
CRC Events (Down/Up):
62774 / 134
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):
249038 / 82
Error Seconds (Local/Remote):
51663 / 62
Hide details

PowermanC3 wrote:
That reports almost 4KM, which is probably quite a bit out. Could it indicate a bad connection somewhere maybe?
Possibly it could however, have you tried to replace your Microfilters?
When I had the problem with my connection (here), the line noise was terrible and I could clearly hear the modem syncing when connecting. Had researched it and found out it could be caused by a HR (High Resistance) fault. 1 month later and having a new lead-in installed, the line was fixed.
Obviously it probably isn't the same scenario but one way to find out is; Does your connection disconnect a lot? I can see your connection has a high uptime so I'm guessing it probably doesn't.
One way I found to diagnose a HR fault by myself was to leave the modem disconnected overnight and in the morning before turning on the modem again, listen for any noise on the line. In my case the Noise seemed to disappear mostly after leaving the modem off for a period of time, despite being diagnosed as a very bad HR fault in the buried Tee which later which turned out to be correct.
The DSL and Phone Signals are on different frequencies and therefore you shouldn't be able to hear the DSL signal on the phone. It means somewhere the DSL signals are leaking into the phone which could be the microfilter, Line Card or a HR fault. Could also be caused by a dodgy phone or Wireless phone.
Any noise on the line as John said shouldn't happen.
Microfilters are the best place to start off with first though if you haven't tried replacing it.
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At a loss with phone line and broadband

Hi,
First of all, sorry for cross posting this, but as you might gather I'm currently stuck between a rock and a hard place.
http://community.bt.com/t5/Phones/At-a-loss-with-phone-line/td-p/54639
I'm not going to repeat everything in that post, just to say when all equipment is unplugged and you get crackles and white noise through the phone, it can not be equipment, no matter how intermittent. Am I correct?
The main reason for cross posting is around the annoying BRAS IP profile. It seems that for 30mins of static, I get stuck on a 130k profile for 3days. I could cope with the occasional outage or slow down, but 3days is half a week and when you have the recent bad weather, you get 1day of decent profile before the next spat! As a result of this, I would like to see if anyone else in the community has been through similar?
I will point out that I have been working in IT for 13years, so I like to pretend that I know something about things, but I must say that BT is one of the only companies that I deal with and dealt with that seem insistent on blaming the customer for everything.
Connection information
Line state Connected
Connection time 0 days, 1:44:21
Downstream 2,048 Kbps
Upstream 448 Kbps
ADSL settings
VPI/VCI 0/38
Type PPPoA
Modulation ITU-T G.992.1
Latency type Interleaved
Noise margin (Down/Up) 9.6 dB / 19.0 dB
Line attenuation (Down/Up) 53.0 dB / 29.5 dB
Output power (Down/Up) 17.8 dBm / 12.1 dBm
Loss of Framing (Local) 0
Loss of Signal (Local) 0
Loss of Power (Local) 0
FEC Errors (Down/Up) 5261636 / 45
CRC Errors (Down/Up) 0 / 2147480000
HEC Errors (Down/Up) nil / 28
Error Seconds (Local) 134
Solved!
Go to Solution.

No I'm suggesting the mod team is preferable to calling India ....
What they do with you is down to them .... and you.
Allbeit I doubt you'll see a profile reset, but even better you may see a lasting resolution, hopefully.

High amount of daily d/c's and line noise regularl...

Afternoon all, heres my problem/gripe:
I'm a regular online gamer, and i'm finding that i get anything from 8-15 disconnections from the network daily, which, as you can understand, is a lil bit frustrating. I have tried different modem/routers, and, at the moment, the HomeHub 3, although it gives slightly lower speeds than the Netgear DG834v4 I was using before, it's not bad for handling the d/c's, ports are forwarded etc for games....
    Also, i have a lot of line noise on the phoneline using the quiet test, heres my stats below. I find that if I completely unplug the filter, it settles the noise for an hour or so, then its all cruddy again. Im using the filters provided by BT. Also, the speed drops randomly, its pretty stable at the moment, but sometimes can drop as low as 0.98kbps, sending me into the dark ages, having me scrabbling around for my club and loincloth, which is annoying, as when i first moved into this house, the net was a respectable 1.4mbps, but has dropped in about three noticable stages over the 6 months since i've lived here.
     I have tried both microfilters that BT have given me, and, am unable to really get a stable line thru the test socket as it would involve metres of extension cable, which would be a pointless exercise..Oh..and the other annoyance is that every time, without fail, the landline rings...I get a disconnection.
    Apologies for the wall of text..but it's not isolated incidents, but daily, regularly..often.. and ofc, i'm a bit wary of phoning the helpdesk, as, ofc, I don't want to be taught to suck lemons, and want to eliminate any hardare error before risking the £130 callout..
   Apologies for wall of text, I have a VERY manly chest and have a lot to get off it!!!
ADSL Line Status
Connection information
Line state:
Connected
Connection time:
0 day, 00:16:16
Downstream:
9,619 Kbps
Upstream:
1,103 Kbps
  ADSL settings
VPI/VCI:
0/38
Type:
PPPoA
Modulation:
G.992.5 Annex A
Latency type:
Fast
Noise margin (Down/Up):
3.0 dB / 6.3 dB
Line attenuation (Down/Up):
33.5 dB / 18.2 dB
Output power (Down/Up):
0.0 dBm / 12.3 dBm
FEC Events (Down/Up):
0 / 0
CRC Events (Down/Up):
41 / 0

As you can hear line noise that needs to be resolved first If you connect via the test socket and try the quiet line test socket and can still hear the noise then you need to report it to BT faults on 151 but do not mention broadband when you call as you are disconnecting when the phone rings that also implies a line problem providing you connect at the test socket and the problem is still there you will not be charged for an engineers visit
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Fault with phone line cleared, but IP profile stil...

Hi,
Apparently there was a fault with my phone line (didn't seem anthing wrong to me), which had caused my IP profile to be dropped, although my connection had never dropped. So an Openreach engineer came out and did something down the road from my house. He called later that day (Friday) to say the fault had been fixed and that my broadband should return to normal after 3 days. Its now over 3 days and I'm still stuck at 2mbps.
Download speedachieved during the test was - 1.91 Mbps
For your connection, the acceptable range of speeds is 0.4 Mbps-2 Mbps.
Additional Information:
Your DSL Connection Rate :8.13 Mbps(DOWN-STREAM), 0.45 Mbps(UP-STREAM)
IP Profile for your line is - 2 Mbps
System Up Time 201:57:13
Port
Status
TxPkts
RxPkts
Collisions
Tx B/s
Rx B/s
Up Time
WAN
PPPoA
937740
1332346
0
420
5663
78:43:14
LAN
10M/100M
2043242
1579859
0
2650
453
201:56:55
WLAN
54M/65M/150M
1062059
503669
0
951
153
201:56:58
ADSL Link
Downstream
Upstream
Connection Speed
8128 Kbps
448 Kbps
Line Attenuation
24.0 dB
14.5 dB
Noise Margin
8.4 dB
27.0 dB
Could a mod help to get this reset please, or do I just need to sit it out and wait?
Thanks
J

Once the Forum Mods have read your post they will post an invite here once you reply to them they will take personal ownership of the problem until resolved.
Do not send them a Personal Message as this is the incorrect contact method and cannot be properly tracked also the mod contacted may not be on shift for sometime and this will delay your help
The forum mods normally reply within 3/5 working days after you have contacted them
They will contact you personally by email or phone
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Noise on phone line and broadband cutting out when...

Hi, I have been experiencing a problem with my broadband dropping out when the phone is in use. I have also had a very crackly/noisy line whilst using the phone.
After reading various problems on these forums (some sound similar) I wanted to see if anyone else could help as I’m still unsure what to do next. I haven’t really had much help out of BT except for them sending out a new Hub (V3) saying that it should fix the problem. It did not fix it and I have since had a few more conversations, which have resulted each time in BT saying that there is no fault on the line, and it will be £130 minimum call out for any further action.
I have done everything I can think of in the house to see if the problem was to do with my household wiring including replacing the wiring for my extension. The filters have all been replaced and I have also used the quiet line facility and there is still noise on the line and the broadband still drops out when the phone is used.
At the moment I really have no clue what to do next so thought if I post up my ADSL line status results that maybe someone would see a problem or maybe have a thought on what to try next as I don't really want to be paying £130.
My set up is BT HomeHub 3 (option 3) with a BT Vison Box. The problem with the broadband dropping out seems to have started around the time I was notified by email that there was an upgrade on the network completion that was on the 24th June.
Any help would be very much appreciated as this is understandably getting a very tiresome. Cheers in advance.
My ADSL line status:
Connection Information
Line state:
Connected
Data Transmitted/Received (GB):
4.3 / 4.3
Downstream:
4.438 Mbps
Upstream:
1.129 Mbps
ADSL Settings
VPI/VCI:
0/38
Type:
PPPoA
Modulation:
G.992.5 Annex A
Latency type:
Interleaved
Noise margin (Down/Up):
13.2 dB / 5.9 dB
Line attenuation (Down/Up):
25.3 dB / 14.5 dB
Output power (Down/Up):
18.3 dBm / 12.6 dBm
FEC Events (Down/Up):
0 / 229
CRC Events (Down/Up):
0 / 85
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 / 7
Error Seconds (Local/Remote):
60 / 25

One thing to add, are you sure on how they phrased the info regarding to the £130 charge. That should only really be applied if it is YOUR equipment that is at fault (and on some occassions if you have damaged the external line).
I have what sounds to be a much more intermittent issue than yours, the vast bulk of my visits have resulting in the engineer not finding an issue (occassionally they do but then seem to lose that info before the next one) and I have never been charged since there is no issue with my equipment and the effect on the broadband can be seen via BT's own logging (ie speed reductions etc).
There has been some reports that sound like inappropriate charging but really you have an obvious line issue and even if intermittent should not be chaged providing you have confirmed it is an external cause.
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Crackly phone line and broadband disconnecting

For a month or two i have been having problems with our phone line and broadband connection. The phone line is extremely noisy (interferance) and when you make a call or recieve a call the broadband disconnects. I have tried different filters, routers and wires but no good. I have conducted a quiet line test and the result was i could hear nothing on the line. When i unplug the hub and just have the phone connected to the socket the noise on the phone has gone and their is no problem, connecting the hub make the noise come back. As a result of all this my broadband speeds are very low.
Here is my hub stats and a bt whole sale speed test.
ADSL Line Status
Connection Information
Line state:
Connected
Connection time:
0 days, 00:36:05
Downstream:
6.75 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):
19.7 dB / 22.0 dB
Line attenuation (Down/Up):
7.0 dB / 3.0 dB
Output power (Down/Up):
13.9 dBm / 12.2 dBm
FEC Events (Down/Up):
7077 / 0
CRC Events (Down/Up):
12 / 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):
19 / 0
Error Seconds (Local/Remote):
131 / 114
Hide details
Download Speed
0.81 Mbps
0 Mbps
2 Mbps
Max Achievable Speed
Download speedachieved during the test was - 0.81 Mbps
For your connection, the acceptable range of speeds is 0.4 Mbps-2 Mbps.
Additional Information:
Your DSL Connection Rate :6.91 Mbps(DOWN-STREAM), 0.45 Mbps(UP-STREAM)
IP Profile for your line is - 1.25 Mbps
My dsl connection rate can get as high as 7.9 Mbps
Any advice would be helpful thank you
Solved!
Go to Solution.

your drops in connection have at one point reconnected with a far lower speed than normal resulting in the low ip profile. if you stay conencted 24/7 for 3/5 days the profile will correct itself for your current connection speed
I would as john46 suggested connected to test socket with a new filter and see if that helps
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Slow throughput on 7.1 Mb/s line

I ran some speed tests today to check my 7.1 Mb/s line as I do occasionally and I found out that even though I was syncing with the CO at 7661 my download speed tests are only coming back in the 1.1 to 2.0 range. Some were actually well below 1.0 today. Previously I was routinely getting speed tests in the 6.5 to 6.6 range on this line, which has been provisioned at this speed for 3 and a half years. My current transceiver stats are as follows:
Transceiver Statistics
Transceiver Revision: 7.2.3.0
Vendor ID Code: 4
Line Mode: ADSL2+ Mode
Data Path: Interleaved
Transceiver Information Downstream Path Upstream Path
DSL Speed (Kbits/Sec) 7661 863
Margin (dB) 6.0 14.0
Line Attenuation (dB) 45.0 25.0
Transmit Power (dBm) 19.4 12.1
I know that my downstream margin is low at 6.0 but this is a VERY STABLE line that will go weeks without losing sync even with that low margin. The ADSL2+ is really giving me some help at my attenuation.
So far today for troubleshooting I tried replacing my 7-year-old Westell 327W B90 modem with a brand-new Westell 327W D90 modem that I had stored away in a box. There was no difference in the speed tests when I used either modem. They were both running the 4.04.03 firmware which is the latest for the Westell 327W modems.
I also tried uninstalling and reinstalling my NIC card as I'm connected via ethernet cable to my modem. That made no difference in my speed tests either.
I did run a Network Diagnostic Tool at M-Lab with the following results:
Upload speed
0.73 Mb/s
Download speed
1.1 Mb/s
Network latency: 5.8e+2 msec round trip time
Jitter: 8.1e+2 msec
Your system: Windows XP version 5.1
Java version: 1.7.0_04 (x86)
TCP receive window: 255552 current, 255552 maximum
9.62464E-4 packets lost during test
Round trip time: 70 msec (minimum), 875 msec (maximum), 580.12 msec (average)
Jitter: 805 msec
0 seconds spend waiting following a timeout
TCP time-out counter: 935
130 selective acknowledgement packets received
No duplex mismatch condition was detected.
The test did not detect a cable fault.
Network congestion may be limiting the connection.
No network address translation appliance was detected.
0.9756% of the time was not spent in a receiver limited or sender limited state.
0.0% of the time the connection is limited by the client machine's receive buffer.
Optimal receive buffer: 261685248 bytes
0 duplicate ACKs set
So it looks like I have a network congestion issue going on. I'm wondering if it has to do with the router that I'm on or if my local CO (Fall River, MA) is having a more widespread problem. I'm thinking of keeping an eye on it for the next few days and see if it gets back to normal on its own. I'm very hesitant to contact Verizon as the last time I did a few years ago they cut my speed down to 5 from 7.1 and took away my ADSL2+. I had to talk to executive customer relations to get them back and it was not an easy task!
Does anyone have any suggestions or opinions about my situation?

PROBLEM RESOLVED
I contacted the Verizon Direct Forum at DSL Reports and received a telephone call from someone at the executive customer relations department at Verizon. He was able to have someone from my local Central Office who does network management/DSL provisioning contact me directly by phone. I was changed over to a "less congested" router right while I was on the phone with this person from my local CO. My ADSL2+ and 7.1 speed package were left intact on my line during the change to a new router. All seems to be well as I am now getting actual speed throughput of 6.5 to 6.6 even during peak evening hours!

How do I get my line back to 13.5meg?

Hello,
I would like to get my 14meg speed back, how do I go about this?
Stats:-
ADSL Line Status
Connection Information
Line state:
Connected
Connection time:
13 days, 00:04:45
Downstream:
13.494 Mbps
Upstream:
1.152 Mbps
ADSL Settings
VPI/VCI:
0/38
Type:
PPPoA
Modulation:
G.992.5 Annex A
Latency type:
Fast
Noise margin (Down/Up):
15.3 dB / 6.6 dB
Line attenuation (Down/Up):
24.4 dB / 14.8 dB
Output power (Down/Up):
18.3 dBm / 11.9 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):
3 / 0
Error Seconds (Local/Remote):
4 / 2
Speedtest (speed.io):
BT Speedtest:
<script type="text/javascript"></script> Test1 comprises of three tests
1. Best Effort Test: -provides background information.
Download Speed
7417 Kbps
0 Kbps
7150 Kbps
Max Achievable Speed
Download speedachieved during the test was - 7417 Kbps
For your connection, the acceptable range of speeds is 2000-7150 Kbps.
Additional Information:
Your DSL Connection Rate :9721 Kbps(DOWN-STREAM), 1179 Kbps(UP-STREAM)
IP Profile for your line is - 8000 Kbps
2. Upstream Test: -provides background information.
Upload Speed
919 Kbps
0 Kbps
1179 Kbps
Max Achievable Speed
>Upload speed achieved during the test was - 919 Kbps
Additional Information:
Upstream Rate IP profile on your line is - 1179 Kbps
3. Quality Service Test: -provides background information.
Video Service Quality Test Passed
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.
Thanks

Hello,
Reason for the wild downstream variations are unknown... ADSL Line Status
Connection Information
Line state:
Connected
Connection time:
13 days, 00:24:46
Downstream:
9.494 Mbps
Upstream:
1.152 Mbps
ADSL Settings
VPI/VCI:
0/38
Type:
PPPoA
Modulation:
G.992.5 Annex A
Latency type:
Fast
Noise margin (Down/Up):
15.5 dB / 6.6 dB
Line attenuation (Down/Up):
24.4 dB / 14.8 dB
Output power (Down/Up):
18.3 dBm / 11.9 dBm
FEC Events (Down/Up):
0 / 0
CRC Events (Down/Up):

Line attenuation

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