CSC Agents not answering the right question

[#1]

See ticket 47752503, so far each agent has replied on the basis of an over confident use of some tool which produces pretty pictures indicating the short term performance of my line. The issue is that over the long term, my line speed has suffered greatly after BT has fixed a line fault, I have gone from +2.5Mb, to about 2Mb after the 1st fault some years back (which BT and PN would not acknowledge) and now recently after BT fixing a 2nd line fault, my line is periodically unstable and dropping to 1.2Mb or so. See tonights log attached, which shows the SNR plot, at the time of the last resync I dropped from 2.5Mb to 1.5Mb. Not happy.

[#2]

FYI, the 1st issue from 2008. http://community.plus.net/forum/index.php/topic,66937.0.html

[#3]

Hi godsell4,
Your sync rate is currently 2560, so that would give a profile of 2000 once it's had a period of stability. A couple of drops yesterday caused it to drop a little. I'm presuming you are currently using the test socket?
Jojo

[#4]

There is no difference if I use the test socket, I have a filtered faceplate, a proper one not an i-plate.
And sorry, Yes I have reset the router to get back to the higher sync rate of 2560, so Yes maybe if I am lucky I will get back to 2Mb.
However, this is *also* overlooking the issue that the line is more unstable after the line was repaired, hence the 'couple of drops' are exactly what I am refering to as a problem, before the line fault, the line was much more stable.

[#5]

Here is what the line looks like for the last couple of hours after the router was reset.
This is a plot of SNR taken at 15s intervals, so there could be more noise between those 15s intervals which we do not see. The variation of 1dB between 10-11dB is not an issue, such variations are how this line looked for many years, it is the larger variations down to 7dB for example which indicate the line is now sensitive or susceptable to noise. Those spikes were not frequent historically.

[#6]

Quote from: godsell4

There is no difference if I use the test socket

How do you mean? I think a period of time in there would help us a lot more. As far as any fault testing goes this would be a requirement, so I think that's the first thing we should do.
Jojo

[#7]

Previously I have connected to the test socket, the behaviour is the same, to do this of course means my home phone would be unreachable for people trying to call me. If you insist, over the weekend, I will run connected to the test socket.

[#8]

Hi godsell4,
If you plug an in-line filter into the test socket you still have a socket for the phone. The thing is, if we raise a fault to our suppliers and they say "is the customer in the test socket" and we say no, they'll just pass it back until you are. It's not a case of me insisting, it is a requirement of the fault process.
Jojo

[#9]

Understood. I have been through this hopeless process before.

[#10]

I can understand the frustration but I'm sure you understand why it has to be done that way

[#11]

Have let the logger run all of today, this time taking readings at 5s intervals compared to the previous 15s intervals.
Yep, as expected, it shows frequent dips in the SNR. This is not normal.

[#12]

SW,
Any noticeable noise on the line? Have you run a quiet line test?

[#13]

Hello James,
A good question, audibly there no significant clicks, pops or other artefacts which I would consider to be unusual. To listen to a quiet line, I jusy took the phone off hook and pressed the 0 button to cancel the dial tone.
SW.

[#14]

All numbers going south as night falls. ADSL is a HF radio signal and is known to be affected by atmospheric affects like this, especially if the line is open circuit, which means faulty.

[#15]

Quote from: godsell4

To listen to a quiet line, I jusy took the phone off hook and pressed the 0 button to cancel the dial tone.

Dial 17070 then 2 for the Quiet Line Test