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Whilst utilising the quiet line test on the phone, i can hear a very slight buzzing, and on the other phone this is louder, if i connect one of the wires to earth using a modified bt jack with two cables, the sound that i can hear (buzzing) just sounds amplified. I have also attached QLN graphs with each cable connected to earth to see the comparison, i was suprised as the black wire there were less spikes they were more rounded, and the white wire they were more spikey? One more prone to interference than the other? 

[burakkucat]

You have got me thoroughly confused and I do not understand what you have done. 

I suspect that other Kitizens are similarly baffled. 

To simplify the viewing of your graphs, I have extracted the contents and reattached the same as images, below.

[Black Sheep]

Same here. Don't do graphs, but putting 'one leg to Earth' whilst listening to the PSTN service is ALWAYS going to increase the audible noise ........... it's a full on earth contact if you do this.

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I was trying to replicate the noise i could hear faintly, as i suspect a line fault somewhere, it sounds exactly as the neighbours line also but much louder. I did the graphs as it show the pickup of rfi is amplified. I have also had something very similar discussed in a previous post, which would only lasted for about an hour. An engineer said that their could be a hr fault, with the sync noise on the line, and also said the clicking could be low insulation/crosstalk, as did yourselves, but couldn't find any fault.