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john46
Distinguished Sage
1,051 Views
Message 11 of 52

Re: Banded Profile after BT repair

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Hi

I am sorry to see you are having problems


I suggest you contact the forum mods they should be able to get your noise margin reset  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

PB54
Expert
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Message 12 of 52

Re: Banded Profile after BT repair

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John

 

Thank you. I appreciate that.

 

I'll report back.

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john46
Distinguished Sage
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Message 13 of 52

Re: Banded Profile after BT repair

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Glad to help any time post back when you can
PB54
Expert
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Message 14 of 52

Re: Banded Profile after BT repair

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Almost got to 4 days and the hub has rebooted itself.

The hub is showing a Downstream Noise Margin of 6 dB and is connected at 15,144 Kbps. Quick speed test shows 12.25 Mbps. 20% faster than its ever been before the line problems.

Just had an email from someone who has reset my connection - ON A SUNDAY! Thank you.

I realise the hub might go through a few more reboots before it settles and I might loose some speed to maintain stability but its a positive start.

ADSL line status
Connection Information
Line state Connected
Connection time 0 days, 01:18:08
Downstream 15,144 Kbps
Upstream 1,083 Kbps
 
 
ADSL Settings
VPI/VCI 0/38
Type PPPoA
Modulation G.992.5 Annex A
Latency type Fast
Noise margin (Down/Up) 6.0 dB / 6.0 dB
Line attenuation (Down/Up) 32.8 dB / 14.8 dB
Output power (Down/Up) 23.1 dBm / 1.6 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) 260 / 0
HEC Errors (Down/Up) 2307 / 0
Error Seconds (Local/Remote) 177 / 0

 

Are all those errors anything to worry about??

 

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ach2
Aspiring Expert
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Message 15 of 52

Re: Banded Profile after BT repair

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Hi PB,

I think that the reboot was just the normal operation from the exchange after it has seen your line stable for 3+ days (same happened for me at 3.5 days). Don't be surprised if this reboots a couple of times over the next week as the exchange relearns the line.

The 15,144 shown on the hub is the sync speed with the exchange, but there are overheads on this for handling how the data is transmitted etc, such as the depth of interleaving.

I'm no expert, but I think 3Mbps is a bit high for pure overhead but you've probably also lost some due to your own network (maybe the speedtest was carried out wirelessly?) I don't think there is anything reserved for Vision.

Cheers,
Alan
RogerB
Guru
1,011 Views
Message 16 of 52

Re: Banded Profile after BT repair

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Good diagnosis Alan ...

 

The connection is a good copybook DSL2+ connection running optimum line factors, and occasionally will force a "training"

reboot as the line gathers some "working history".

Just needs to be left on 24/7 ... and used. The likliest change you may see is a change to interleave, although the fastpath error count is nothing to be concerned about. It should get better and better.

john46
Distinguished Sage
1,009 Views
Message 17 of 52

Re: Banded Profile after BT repair

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just leave the connection to settle now no manual restarts speed tests will will vary constantly depending on general internet usage
PB54
Expert
1,004 Views
Message 18 of 52

Re: Banded Profile after BT repair

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Apologies for the post edit. I posted from my phone, then realised my error and couldn't edit it until i got on my PC....

****

ach2 - Thanks. I had an email from BT Customer Services immediately after the connection came back to say it was reset.

I removed the question about the 3 Mbps because i looked at the speedtest again (Yes the tests were done wirelessly) but i think its my mis-understanding of the figures more than anything. I got the BT Vision bit from one of the screen in the BT Vision menus that shows 314xxx bps (or something simalar) but to be honest i think i'm just get myself confused.

 

RogerB - Thanks for the reasurance over the errors. I would say they've never been that high in the past but until the last couple of weeks i'm not sure i ever noticed what they were!! Only that they were mainly zero the last few days. You say it's nothing to worry about so i'll not worry.

 

john46 - Thanks for everything. As you say i'll leave it for now. I understand there might be some settling down.

 

Latest speed test just broke 13 Mbps downstream and 0.92 upstream...

BT Wholesale Broadband Performance Test Broadband Speed Test Results

Download Speed (Mbps) 13.03 Upload Speed (Mbps) 0.87 Ping Latency (ms) 29.25

 

Connection Information
Line state Connected
Connection time 0 days, 02:06:03
Downstream 15,144 Kbps
Upstream 1,083 Kbps 
 
ADSL Settings
VPI/VCI 0/38
Type PPPoA
Modulation G.992.5 Annex A
Latency type Fast
Noise margin (Down/Up) 5.7 dB / 6.0 dB
Line attenuation (Down/Up) 32.8 dB / 14.8 dB
Output power (Down/Up) 23.1 dBm / 1.6 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) 325 / 0
HEC Errors (Down/Up) 2566 / 0
Error Seconds (Local/Remote) 238 / 0

 

I'll see where we are in a couple of weeks or so and report back.

 

Thanks again

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PB54
Expert
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Message 19 of 52

Re: Banded Profile after BT repair

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All going so well. Download speeds of 1.5 Mb/s etc

Downloads quicker than before

iTunes downloads racing away

 

Then tonight...

 

Connection Information
Connection time 2 days, 09:51:21
Data Transmitted/Received (MB) 121.3 / 2838.1

 
Line State Connected
Connection time 2 days, 09:54:49
Downstream 15,144 Kbps
Upstream 1,083 Kbps 
ADSL Settings
VPI/VCI 0/38
Type PPPoA
Modulation G.992.5 Annex A
Latency type Fast
Noise margin (Down/Up) 3.3 dB / 6.6 dB
Line attenuation (Down/Up) 32.8 dB / 14.8 dB
Output power (Down/Up) 20.7 dBm / 1.6 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) 41777 / 0
HEC Errors (Down/Up) 375265 / 0
Error Seconds (Local/Remote) 38231 / 0

 

Was getting download speeds of 1.5 Mb/s but now more like 280 kb/s. Have i hit some sort of cap?

 

How about all the errors?

 

Speed tests still shows downstream at 11.5 Mbps...

 

Surfing also noticably slower. After the fix pages snapped in place in one go. Now they load in 2 or 3 bits with a pause...

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RogerB
Guru
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Message 20 of 52

Re: Banded Profile after BT repair

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It's because the noise margin is now running a lot lower at night time .... 3.3db

 

And because it is .... the errors are racking up, overhead is higher, and bitloading is lower.

 

It's a phase a lot of DSL2 connections go through, and train themselves out of ....

 

Try not to reset it, although it may reset itself, and load a higher margin, at which point bitloading will improve.

 

Not "normal" so to speak, but not unusual either.