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Author Topic: ADSL speed problems, unsure of what to try next  (Read 6458 times)

ben_moore34

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ADSL speed problems, unsure of what to try next
« on: June 01, 2009, 10:57:38 PM »

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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roseway

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Re: ADSL speed problems, unsure of what to try next
« Reply #1 on: June 01, 2009, 11:09:32 PM »

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 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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jeffbb

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Re: ADSL speed problems, unsure of what to try next
« Reply #2 on: June 01, 2009, 11:14:16 PM »

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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ben_moore34

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Re: ADSL speed problems, unsure of what to try next
« Reply #3 on: June 01, 2009, 11:32:58 PM »

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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Ammit

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Re: ADSL speed problems, unsure of what to try next
« Reply #4 on: June 01, 2009, 11:54:33 PM »

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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ben_moore34

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Re: ADSL speed problems, unsure of what to try next
« Reply #5 on: June 02, 2009, 12:03:23 AM »

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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kitz

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Re: ADSL speed problems, unsure of what to try next
« Reply #6 on: June 02, 2009, 01:06:10 AM »

>> 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 SNRtype 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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ben_moore34

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Re: ADSL speed problems, unsure of what to try next
« Reply #7 on: June 02, 2009, 01:13:52 AM »

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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ben_moore34

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Re: ADSL speed problems, unsure of what to try next
« Reply #8 on: June 02, 2009, 01:37:32 AM »

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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kitz

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Re: ADSL speed problems, unsure of what to try next
« Reply #9 on: June 02, 2009, 01:47:34 AM »

>> 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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ben_moore34

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Re: ADSL speed problems, unsure of what to try next
« Reply #10 on: June 02, 2009, 02:14:27 AM »

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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kitz

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Re: ADSL speed problems, unsure of what to try next
« Reply #11 on: June 02, 2009, 10:54:15 AM »

Good luck - let us know how it goes.


In the meantime -   could you put your details in the adsl checker 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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ben_moore34

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Re: ADSL speed problems, unsure of what to try next
« Reply #12 on: June 02, 2009, 01:01:51 PM »

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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ben_moore34

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Re: ADSL speed problems, unsure of what to try next
« Reply #13 on: June 02, 2009, 01:03:07 PM »

That one above is with postcode and phone number
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ben_moore34

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Re: ADSL speed problems, unsure of what to try next
« Reply #14 on: June 02, 2009, 01:07:53 PM »

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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