Well last weekend when I borrowed the laptop, emptied & moved a bookcase/table thingy out of the way and tried to do some testing, the line behaved itself and I couldnt find any difference between using the NTE and the extension.
One thing I did find out (and remember) by carrying out this exercise is that the piece of furniture will not fit if I add an i-plate, as its right up to the doorframe as it is. So if a vdsl faceplate is added in the current location, then the gap really is so tight that I wont be able to open the door to the hall. Not BTs problem, but Im now hoping that he will move the NTE permanently because I really have nowhere else for that piece of furniture to go The line aside from some bouts of SNR and a couple of line drops seems to have been okish for the past week. The fluctuations and drops are usually during the night. Its far from my usual rock steady connection but since mostly the SNR fluctuations seem to be about 3dB I doubt anyone would take this as life threatening.
Today the attenuation has changed yet again. Now at:-
Line Attenuation (Up/Down) [dB]: 9,1 / 14,0----
As we all know, attenuation shouldnt change and upstream issues are normally either a line fault or internal wiring. Ive been unable to detect any difference between master socket and extension.
QLT on phone seems ok, although admittedly not been able to do one at same time as the problems occur.
Using the phone doesnt seem to cause any issues with my line stats
There is no pattern to the issues.. they mostly occur in the wee small hours or in the mornings.
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Previous Att (Annex_M) 7 / 12.5
Previous Att (adsl2+) 4 / 12
This is a record of my attenuation over the past few weeks
7,0 / 13,5
10,4 / 14,0
5,2 / 13,5
10,5 / 14,0
10,4 / 13,5 07/07/2013
10,4 / 14,0 11/07/2013
9,1 / 14,0 13/07/2013 10:59:12
Unfortunately Ive just upgraded dslstats so lost the ability to see all the old stats
, but I have been able to recover the SNRM showing what happened today, and tried to reconstruct what I can from what info is available. This is kind of typical of what I see.
10:55 first my upstream SNRm takes a loss of about 3dB, downstream loses 1.5 dB, things get flakey for a few mins.
10:59 Attenuation changes
10:59 Upstream SNRM drops to 0dB (was previously 5dB)
10:59 Line drops
11:00 Line comes back up
11:24 Period of instability. Upstream fluctuates between 4dB and 0dB Corresponding fluctuations in downstream SNRM between 3dB and 1dB. Line continues to hold.
11:45 Line begins to stabilise 4dB up 3dB down.