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Aspiring Contributor
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Message 1 of 28

Broadband line throughput dropped massively overnight - wiring?

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Hi

 

I've had BT internet for about a year and have always had stable 16-19mb download speed depending on time of day. This morning I had a normal downstream rate ~18mb and SNR -3 - but very little actual throughput/internet with everything timing out. Worked fine the night before.

 

I rebooted router and got ~15mb /SNR 6 and about 12mb. However my SNR keeps dropping to 5 and the throughput goes down with it to 4-7mb. Everytime I resync the SNR goes to 6 and the speed to 12 - then it drops again.

 

Things I've checked

 - plugged in Home hub (normally use a belkin router)  - no change

 - plugged into test socket - no change - only 1 socket in house anyway!

 - Tested wired connection - no change

 - changed filter and ADSL cable - no change

 - I'm 1km from exchange so not a distance issue

 - Quiet line test (on cordless,no corded phone available) - slight hiss - is this normal?

 

I had a look at the wiring between the master socket and the grey box on the outside of my house and some of the insulation is slightly worn, the inner wiring appears intact though. I taped over the damaged areas for now. I can't honestly say if this is new or not, but I suspect its been like that for a while.

 

The latest stats from the home hub after I called BT and resynced are

///

  ADSL Line Status

    Connection Information

Line state:    Connected
Connection time:    0 days, 00:34:10
Downstream:    15.19 Mbps
Upstream:    1.223 Mbps


    ADSL Settings

VPI/VCI:    0/38
Type:    PPPoA
Modulation:    G.992.5 Annex A
Latency type:    Fast
Noise margin (Down/Up):    5.5 dB / 6.3 dB
Line attenuation (Down/Up):    18.6 dB / 11.7 dB
Output power (Down/Up):    19.9 dBm / 12.4 dBm
FEC Events (Down/Up):    0 / 0
CRC Events (Down/Up):    56434 / 9
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):    37410 / 18
Error Seconds (Local/Remote):    1910 / 6

///

The downstream, SNR and line attenuation look normal, but the high number of CRCs/HECs and error seconds would lead me to believe there is a line fault - everytime the BT system drops the SNR, the errors stop a high throughput being achieved. The belkin router reports v.similar SNR, speed and line attentuation but doesn't record CRCs etc.

 

I've called up BT line faults and got through to broadband help - they ran a line test that seemed to throw up odd results I quote " The speed keeps going up and down". The lady conferred with a supervisor and they told me that this was likely the result of work at the exchange (Sunday 7am-8pm?) and to monitor it for a few days. I mentioned the condition of the wiring and the technical details  but I'm not sure if it registered.

 

Can one of the mods advise on this explanation, because it came across as a bit of a brush off.

 

If the symptoms suggest a wiring fault - is the wiring from the grey outside box to the the internal master socket my responsibility or BTs? Theres conflicting answers on this forum about engineer charges!

 

Hope the above makes sense

 

Thanks in advance

 

Mike

 

 

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27 REPLIES 27
Distinguished Sage
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Message 2 of 28

Re: Broadband line throughput dropped massively overnight - wiring?

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you need to get interleaving turned on to stabilise your line the errors are reducing your download speed
I suggest you contact the forum mods and ask them to get interleaving turned on for you this is a link to them http://bt.custhelp.com/app/contact_email/c/4951


They normally reply by email or phone directly to you within 3 working days they will take personal ownership of your problem until resolved and will keep you informed of progress


They are a UK based BT specialist team who have a good record at getting problems solved


This is a customer to customer self help forum the only BT presence here are the forum moderators
Distinguished Sage
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Message 3 of 28

Re: Broadband line throughput dropped massively overnight - wiring?

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Is this the grey box you are referring to if yes then Open reach are responsible to thereexternal_NTE_1.png

Aspiring Contributor
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Message 4 of 28

Re: Broadband line throughput dropped massively overnight - wiring?

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Hi

 

Thanks for the quick response

 

 - Interweaving - shouldn't this be on by default with a recent connection? I never use the home hub so I didn't notice the latency type setting. My ping has always been 25-50 on speed test.

Any reason why this would suddenly switch itself off.

 

Plus my belkin router currently reports "interleaved path" - is this the same thing or is the belkin mis-reporting.

 

- Grey box, My one isn't like that -looks more like below, same thing?

 

 

 

 

Mike

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Distinguished Sage
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Message 5 of 28

Re: Broadband line throughput dropped massively overnight - wiring?

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your hubstats posted show you on fast path that is why i said interleaving needs to be turned on normally interleaving is set to auto and in your case the errors are affecting your download speed
Distinguished Sage
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Message 6 of 28

Re: Broadband line throughput dropped massively overnight - wiring?

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are you still connected to the test socket ?
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Aspiring Contributor
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Message 7 of 28

Re: Broadband line throughput dropped massively overnight - wiring?

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Hi

 

I see the fast thing listed on the home hub stats, as I said maybe the Belkin is mis-reporting

 

I'm back on the normal socket now

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Distinguished Sage
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Message 8 of 28

Re: Broadband line throughput dropped massively overnight - wiring?

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Contact the forum mods as I suggested and get interleaving set to on rather than auto as it is now
Aspiring Contributor
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Message 9 of 28

Re: Broadband line speed dropped massively overnight - BT not inspiring confidence

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Hi I contacted the mods on Sunday evening but haven't heard anything back yet - but thats fair enough if its 3 working days response time. I did get a call back from BT as promised. The lady told me that BT are upgrading the exchange (Stratton St Margaret, Swindon) and other people in the area had reported problems, although she was very vague when I questioned her why this wasn't listed on the service status website or any sort of eta on when the work will be completed. She initially wanted me to wait for a week and offered to send a new home hub. This is despite my repeated attempts to tell her that the home hub is fine and the problem was seen on a separate belkin router as well. After pressing for an engineer visit, I got told my line would be fully reset and this would take 4-5 days. So I'm to leave it till the 23rd and then report back. Oh well, at least I'll have a spare home hub. my latest hub stats are below Line state: Connected Connection time: 1 days, 01:03:59 Downstream: 15 Mbps Upstream: 1.188 Mbps ADSL Settings VPI/VCI: 0/38 Type: PPPoA Modulation: G.992.5 Annex A Latency type: Fast Noise margin (Down/Up): 5.5 dB / 6.1 dB Line attenuation (Down/Up): 18.7 dB / 11.6 dB Output power (Down/Up): 19.9 dBm / 12.4 dBm FEC Events (Down/Up): 0 / 0 CRC Events (Down/Up): 3321028 / 46 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): 2800057 / 57 Error Seconds (Local/Remote): 84887 / 15 according to BT speed test I'm getting 3.88mb down and 0.94mb up. Before Sunday I got 16-19mb download speed depending on time of day. The line is syncing slightly slower then it was, but all the CRC errors are causing problems. I'll send another email to the mods, but if any of them read this - please pm me and restore my confidence in BT!
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Aspiring Contributor
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Message 10 of 28

Re: Broadband line speed dropped massively overnight - BT not inspiring confidence

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Sorry for DP, horrible formating in my last post for some reason

 I contacted the mods on Sunday evening but haven't heard anything back yet - but thats fair enough if its 3 working days response time. I did get a call back from BT as promised. The lady told me that BT are upgrading the exchange (Stratton St Margaret, Swindon) and other people in the area had reported problems, although she was very vague when I questioned her why this wasn't listed on the service status website or any sort of eta on when the work will be completed.

She initially wanted me to wait for a week and offered to send a new home hub. This is despite my repeated attempts to tell her that the home hub is fine and the problem was seen on a separate belkin router as well. After pressing for an engineer visit, I got told my line would be fully reset and this would take 4-5 days.

So I'm to leave it till the 23rd and then report back. Oh well, at least I'll have a spare home hub. my latest hub stats are below

Line state: Connected Connection time: 1 days, 01:03:59 Downstream: 15 Mbps Upstream: 1.188 Mbps ADSL Settings VPI/VCI: 0/38 Type: PPPoA Modulation: G.992.5 Annex A Latency type: Fast Noise margin (Down/Up): 5.5 dB / 6.1 dB Line attenuation (Down/Up): 18.7 dB / 11.6 dB Output power (Down/Up): 19.9 dBm / 12.4 dBm FEC Events (Down/Up): 0 / 0 CRC Events (Down/Up): 3321028 / 46 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): 2800057 / 57 Error Seconds (Local/Remote): 84887 / 15

 

according to BT speed test I'm getting 3.88mb down and 0.94mb up.

 Before Sunday I got 16-19mb download speed depending on time of day. The line is syncing slightly slower then it was, but all the CRC errors are causing problems.

 I'll send another email to the mods, but if any of them read this - please pm me and restore my confidence in BT!

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