just an update:
Sky have been blinding... cant knock em for how they have assisted mind.
changed Line Card, results are exactly the same... so, because they have evidence of my line doing 18-19Mb previously they are sending out a broadband specialist engineer who has access to the whole kaboodle (lines, duct & exchange) and specialist tools too locate noise on lines etc... ive been told he should find the problem, he may even be able to shorten my line as the last engineer said the cab im connected to is one up the road going in opposite direction from exchange , BUT , by road Iam 1600m from exchange, my loop loss estimates about 1900m - the cab he is on about is more than 300m away , mind he must be right as he said it said so on paper, cab 15 I think it was.. so this engineer may be able to make it shorter by running it to the cab at end of road instead (where it should be connected)
(taken from my other thread:)
also, Stanley @ Sky escalations rang just now and said he wasnt convinced that the LL14 engineer would fix it, but hopes he does, he says some are good and some are bad BUT he done some more tests and they were all green except for ONE which was red and said "HIGH AM NOISE, POSSIBLE GROUNDING FAULT" - hehehe - I explained what asbokid told us about the transmitters broadcasting on AM and how the noise spikes are now much more prominent since the switch and that there could be a wire in contact with something that acts as an ariel making the already present noise much worse... he agree's
he was very nice and helpfull, at first I thought he was gunna cancel the engineer the way he is going on because I was playing about with SNR Margin and got it up to 13,500k with 3.5db SNRM (2,200k increase) with almost no extra impact on errors and he seen it didnt he.. but he was reading the TARGET SNRM saying it was at 7db @ 13.5Mb... i told him I had been changing the noise margin and its actually at 3db..in an attempt to see what I could tweak it too should the LL14 engineer be unsuccessful at finding the fault - I reset it back to normal to show him it was still 11.3Mb with 7db and he said "ahhh yes, i see... how is it your able to change the noise margin..?" hehe - I told him I use a tool that changes it in my sky router (it is a sky one too, just not sky firmware)
I told him I was very pleased with the efforts that sky have gone to in an attempt to fix it for me even though I am inside the estimated speed they gave me, other providers wouldnt have done that...and he kept saying "thank you for that" - if he cant do it, then he cant do it... I will see if Chris at tier 2 can tweak INP/Interleaving and see if we can squeeze anything more out of it - I dunno if the values lowered will do anything to help (INP=1 / IL=64) and especially if Iam lowering SNR Margin... probably best just leaving it.
so, fingers crossed for Saturday... wished I had some wonga, I would backhand the lad some money if I had it in an attempt to boost his effort, as its likely to be pee'ing down I reckon he will just get sick and call it off (it is Saturday after all) ..............TEA & BISCUITS
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Topic: Line Attenuation has shot up after crossed wire resolve (Read 19982 times)