here you go, bearing in mind their records should show show a steady 5-6 meg line for ages-
We had a broadband outage yesterday (12/5/15), now it is back on we consistently connect at approx 4.5 meg with an SNR of 6db even after several reconnects.
Before this we connected at 6 meg plus.
We are on adsl2+ with a attenuation of 47db.
Can you please investigate where our lost speed has gone?
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I can see that your line profile had Interleaving on.
I have changed this to a fast path profile, please could I ask you to reboot your router and retest.---
Done that, if anything its slower but that could be due to line noise given the time.(early evening)
I don’t feel it is related to interleaving as it was on prior to the recent downtime so it would seem something definitely changed unrelated to interleaving.
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Beginning to see a fair amount of erroring going in both directions on this circuit which may indicate some localized interference.
Has the Line filters been changed at all please? And have you plugged into the BT test socket as well please.---
The router has always been plugged into the master socket, not changed the filter
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I have changed the profile of the circuit to an interleaved 9db SNR one.
This may well be more suitable than the 6db fast path you were on previously as your circuit is 3.2km long.---
Can you please change the target SNR back to 6db
The higher you raise the target SNR the lower the connection speed will be. Now it is set at 9 I am barely connecting at 4 meg.
My target SNR has been 6db for a long time and connecting at between 5 and 6 meg without issue.
Please return my line to 6db and investigate why it is has had a drop in connection speed.
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*returned to 6db*
I just wanted to share with you the trends of erroring on this circuit.
There is small but consistent amounts of erroring all day and on everyday. There is also upstream erroing which will be the cause of overall throughput degredation.This erroing on the upstream starts at approximately 10:00 each day and ends 19:00 - 21:00 each evening. This kind of erroing is caused by localized interference.
The Synch speed remains at a constant 4.5meg (attainable rates are higher but unrealistic)---
Could you just clarify why you think my synch has gone from consistently connecting at approx 6 meg to connecting at 4 meg if the noise issue is intermittent? Surely when the noise is absent I would connect at the higher rate?
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The throughput (speed) issues you are seeing are most likely being caused by interference on the line.
The majority of this is downstream, but also quite a lot upstream as well. Upstream erroring and interference is normally caused by something on or close to your premises that is creating an electromagnetic field that is on the same wavelength that your ADSL modulates on.
Here is a useful link that will tell you a little more about the problem
http://www.kitz.co.uk/adsl/rein.htm *hahaha*
In the meantime it would be worthwhile checking your house or the location of the router to make sure that there is no other electrical appliances/devices that could be causing any interference.
