Kitz Forum
Broadband Related => ADSL Issues => Topic started by: ben_moore34 on June 01, 2009, 10:57:38 PM
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Hello
Over the past 3 weeks my internet connection has been very slow.
I used to get between 1.5 and 2 meg downloads but now it's more like 30k
My router (Linksys WAG354G) is connected at the following -
DSL Modulation Mode: GDMT
DSL Path Mode: INTERLEAVED
Downstream Rate: 384 Kbps
Upstream Rate: 448 Kbps
Downstream Margin: 14 db
Upstream Margin: 19 db
Downstream Line Attenuation: 49
Upstream Line Attenuation: 30
Downstream Transmit Power: 0
Upstream Transmit Power: 0
I have at the request of my ISP conducted several BT speed tests and they all report the following
est1 comprises of Best Effort Test: -provides background information.
Your DSL connection rate: 384 kbps(DOWN-STREAM), 448 kbps(UP-STREAM)
IP profile for your line is - 250 kbps
Actual IP throughput achieved during the test was - 182 kbps
My ISP have been telling me to leave my router on and not re-boot, I usually leave everything on anyway. The stats have remained the same.
About a week agao I got fed up with the low speeds and decided to re-boot the router. The router synced at about 1056kbps which was a lot better than the 384 I was getting previously. After 2 days I noticed that my sync had dropped to 900kbps and then 600. I rebooted again and ended up back on 384kbps.
I'm not sure what to do now. I'm tempted to purchase a new router to see if that gives me any better results.
Is it worth me rebooting again to try and get a better sync or should I leave my connection alone as advise by my ISP?
Many thanks in advance for your help.
Cheers
BM
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It's unlikely to caused by the router. You've got a bad problem with the connection, which could be due to internal wiring, high interference or a line fault. Have a read of this (http://www.kitz.co.uk/adsl/troubleshooting.htm) and the associated pages, which should help you to home in on the source of the problem. In particular, connecting to the test socket disconnects all internal wiring, so you would see if this is the cause.
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hi edit roseway beat me to it
quote Your DSL connection rate: 384 kbps(DOWN-STREAM), 448 kbps(UP-STREAM)
IP profile for your line is - 250 kbps
Actual IP throughput achieved during the test was - 182 kbps
you seem to have had some bad connection probably due to noise .with your aattenuation I would expect a synch of 5088Kbps and a profile of 4000. That is assuming you are on 8max
have a read of this http://www.kitz.co.uk/adsl/socket.htm to make sure your problems are not internal.
Who is your ISP?
Can you provide full router stats this link should help http://www.kitz.co.uk/adsl/frogstats.php
Regards Jeff
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Hello
Thanks for the quick reply
My house has only one phone socket so there is no internal wiring (line was put in 3 years ago).
My microfilter is connected to the master socket and has been for 2 weeks now as advised by my ISP.
My ISP is Namesco NDO
My line stats are (from the router page link)
ADSL Line Type GDMT
ADSL Line CodingADSL Line Coding INTERLEAVED
Line Attenuation (Down):49 (Up):30
Noise Margin (Down):14 (Up):19
Total Output Power (Down):0 (Up):0
Current State DownStr: 384(K) UpStr: 448(K)
undefined UP
FEC(FAST) (Near):0 (Far):0
FEC(INTERL) (Near):16252 (Far):10098
CRC(FAST) (Near):0 (Far):0
undefined (Near):115 (Far):4
HEC(FAST) (Near):0 (Far):0
HEC(FAST) (Near):7820 (Far):0
Showtime last(sec) 1243898846
ADSL FW Version 0.54
ADSL Board Type Annex A
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Is there any noise on your actual phone line?? Is the filter new?? All probably daft questions. I am not 100% on error rates but some of the guys on here are great - I won't comment on the errors although I think it looks like there are some on the line.
Yes you could try another router but I don't think that is what is causing the issue either...I think it is likely a fault at the exchange if you have one phone socket and your router is plugged in there.
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Hello
Yeah I have tried 3 microfilters so far all new, I also tried an old BT Voyager USB modem which connected at the same speed.
My phone line is clear of noise.
I have just tried an exchange checker which is showing
Virtual paths: Red
The ETA fix time is: 14 May 09
not sure how accurate this checker is, the eta time for the fix was 2 weeks back.
So you reckon the problem could be the exchange? If so I guess I'll just have to bear with the slow connection until they upgrade it.
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>> Line Attenuation (Down):49
A good 49dB line should be able to sync some where in the 4.5 - 5Mb region.
Since youre only connecting at 384 kbps... then that points to a low SNR (http://www.kitz.co.uk/adsl/lowSNR.htm)type problem or a fault on the physical wire (either internal or external).
Do you have a test socket behind the faceplate which you can try connecting via? This is an important test in cases like yours.
[NTE5]
>> My phone line is clear of noise.
It may also be worthwhile trying a quiet line test. (Dial 17070 and select option 2).
>> So you reckon the problem could be the exchange?
Nope... a red exchange means you can expect to see some slower than anticipated throughput (real-time) speeds.
That does not in any way impact on, nor will it affect your sync (connection) speed.
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Hello
Thanks for all the replies so far.
Yeah my line has been plugged into the test socket for 2 weeks now & it doesn't seem to have made any difference.
My pc is right next to the socket and it's the only one in the house.
The maximum speed I've seen on my line has been just over 2meg, that was a year or so ago, it's usually been 1- 2mb up until the past few weeks of course.
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Thanks again for the comments
Looking back through my correspondance with the support at my ISP they are saying -
"Looking back through your connection history your line is dropping synch for between 30 an 50 seconds but your ADSL line figures do not indicate an issue with SNR figures being outside of the range for you provisioned speed."
"Rebooting your ADSL router indicates to BT that your ADSL line is unstable causing them to reduce the line speed to try an obtain a stable connection. It can take up to 5 days before any change becomes apparent."
I might re-boot the router later and see what happens, it's been sitting at 384kbps for days now, I guess it'll either sync higer or lower.
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>> Looking back through your connection history your line is dropping synch for between 30 an 50 seconds but your ADSL line figures do not indicate an issue with SNR figures being outside of the range for you provisioned speed."
You may like to ask them then if they consider that a 384kb sync speed is right for a 49dB attenuation line.
- I think not!
>> "Rebooting your ADSL router indicates to BT that your ADSL line is unstable causing them to reduce the line speed to try an obtain a stable connection. It can take up to 5 days before any change becomes apparent."
Ummm.. that 5 day thingy is in relation with your IPprofile - it has no bearing at all upon your sync speed.
Your line should always sync (connect) as fast as it can depending on the available SNRM.
It may be worth asking them if they can perform a WOOSH test (xdsl status check).
From those figures they should be able to see your loop loss. If your loop loss is 49dB and you are syncing at <512 kbps.. then alarm bells should hopefully start ringing somewhere.
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Cheers Kitz
Have sent them a mail, hopefully it'll get sorted out.
I was close to changing supplier as I don't seem to be getting anywhere fast.
I remember ages ago I was on a fixed speed 2mb connection on this same line. Every so often the connection would drop and re-connect really quickly (every second or so) This made the connection unusable so they put me on the adsl max service which was much better for a while.
BM
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Good luck - let us know how it goes.
In the meantime - could you put your details in the adsl checker (http://www.kitz.co.uk/adsl/adslchecker.php) please.
The figures I'd be interested to see are :-
~ Under the Exchange information section
Distance:- Direct:
(appx)* By Road:
~ Under the BT Line Speed Estimation
What it says for your line speed estimation.
For the line speed estimation first of all can you perform the test using both your phone no and post code.
Then I'd like you to repeat the test using just the post code.
I'd like to see if your attenuation is approx right for the line length (this isnt an exact science but it may show something).
and secondly.. I'd like to see if the BTw database for your line ties up on both your phone no and on your post code.
Post code only gives me an idea of what others in your area see.. Phone no results should be more specific to your own line.
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Ok
Exchange: Montfort. BT Code: EMMONTF
Location: Wellington Street, LE1 6HL
Distance:- Direct: 1.86 km
(appx)* By Road: 2.74 km
Status
ADSL enabled : September 30, 2000
DSL Max enabled: March 31, 2006
SDSL enabled : Enabled
21CN due : (PSTN) No Info
21CN WBC (Broadband) Enabled 31.05.09
Broadband Access† Market 3
Fixed ADSL: 1024 kbps (1 Mb)
DSL Max : 3000 kbps (3 Mb)
21CN WBC : Not Available
Thanks
BM
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That one above is with postcode and phone number
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Here it is with postcode only
Exchange: Montfort. BT Code: EMMONTF
Location: Wellington Street, LE1 6HL
Distance:- Direct: 1.86 km
(appx)* By Road: 2.74 km
Status
ADSL enabled : September 30, 2000
DSL Max enabled: March 31, 2006
SDSL enabled : Enabled
21CN due : (PSTN) Phone No Required
21CN WBC (Broadband) Enabled 31.05.09
Broadband Access† Market 3
Fixed ADSL: 1024 kbps (1 Mb)
DSL Max : 3500 kbps (3.5 Mb)
21CN WBC : Not Available
I've just had a look at my router stats and my sync seems to have gone up a bit! After weeks of being on the same speed.
ADSL Line Type GDMT
ADSL Line CodingADSL Line Coding INTERLEAVED
Line Attenuation (Down):49 (Up):31
Noise Margin (Down):6 (Up):18
Total Output Power (Down):0 (Up):0
Current State DownStr: 736(K) UpStr: 448(K)
undefined UP
FEC(FAST) (Near):0 (Far):0
FEC(INTERL) (Near):0 (Far):235836
CRC(FAST) (Near):0 (Far):0
undefined (Near):0 (Far):1
HEC(FAST) (Near):0 (Far):0
HEC(FAST) (Near):0 (Far):0
Showtime last(sec) 13937
ADSL FW Version 0.54
ADSL Board Type Annex A
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Thanks for those.
>> By Road: 2.74 km
Most lines follow the road for the E-side(to the green cab) but can go 'around the houses' a little bit after that..
so comparing that to your router reading
>> 49dB = approx 3.55 km
so that is possible.. I was more wanting to make sure that a much longer line length didn't come up, Some lines may also have aluminium on the line which increases the attenuation so Im happy that those figures tie up the right way.
>> Phone no : DSL Max : 3000 kbps (3 Mb)
>> Post code: DSL Max : 3500 kbps (3.5 Mb)
BT expects your line to perform at 3000 kbps... which is slightly less than those in your neighbouring area.. suggesting that it does seem to under perform on occasions.
>> Current State DownStr: 736(K)
Without a doubt that line has a problem caused by low SNR.
Your Noise margin is currently 6dB.. meaning there is insufficient SNR to currently support any further speed and sync any faster than it is doing right now.
Low SNR is either that the Signal is too weak and/or being drowned out by Noise.
Since you are connected to the master socket, have checked all your filters and router... then this would seem to point to a fault on the physical line itself. You have done all the diagnostics you can yourself.. we have given you more to do which further would point to a line fault.
If I were you I would contact my ISP outlining all the facts stating that 736 kb is not acceptable on a 49dB line and suggest that this now needs looking at by an Openreach adsl engineer on the premises.
Your ISP should be able to clearly see from a WOOSH test that something is very wrong.
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If you want copy and paste the information above... it gives the ISP a lot of info.. it also hopefully lets them know that something is wrong. Unfortunately not all 1st line support staff are able to read/understand/interpret some of the tests that we have done so hopefully this information is also putting them in the picture too.
You have done way more diagnostics that the average person would be able to.. so the ball is now in your ISPs court.
Good luck and please let us know how it goes.
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Hello
Thanks again for the assistance.
I've just had this reply from my ISP, will have to wait & see what the outcome is.
Good afternoon,
I have just performed a BT status check on your ADSL circuit and the following figures have been returned
Upstream Loop Loss = 31 SNR = 22 Speed = 448
Downstream Loop Loss = 49 SNR = 10 Speed = 736
Current line rate = 250
I am currently logging a low threshold breach fault with BT and as soon as I have a response I will inform you of the outcome.
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>> just performed a BT status check on your ADSL circuit and the following figures have been returned
Good :)
The figures were as anticipated and show a problem
>> a low threshold breach fault with BT
Whilst not good news that your line is in that condition... its good news that at least theyve now acknowledged the fault and lodged it with Openreach which is where it now needs to be in order to get it fixed.
:fingers:
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Yeah, it is good news that they have finally realised that there is a problem.
I'll let you know what the result is.
Any idea what the BT procedure for Low Threshold Faults is?
Thanks once again for the helpful suggestions.
Cheers
BM
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BT will also check the figures.. then should arrange a mutually convenient appointment for an engineers visit.