Not as yet. Still in the Sky training / assessment period so I'm disinclined to meddle with it. Plus I've yet to go through the faff of extracting username / password from the Sky router.

Neighbours above or below? A semi- with your router against wall? Lining in a block of flats and telephone cables coming up a service duct? Line fixed to neighbouring property? Underground feed that passes under teh neighbours drive/garage/extension?

There are lots of possibilities, you can have a great time finding the source.

Have you just moved there, or have you been there a while and your previous broadband was fine?

Did you reboot at ~12:25:30? That is a disconnect/reconnect.

Edited by RobertoS (Fri 06-Feb-15 00:19:59)

This is a "new" line. Well, not new exactly, there was a line into the place with an LJ/2A that had been inactive for a number of years. Signed up with Sky as they were offering free "new" lines installation plus topcashback and M&S voucher with 12 month contract.

No, I did not reboot anything at 12:25:30 . The Sky router did reboot ~11:57 spontaneously (I have it set to send syslog messages to my log box). I'm guessing that's part of Sky's training period, having experienced a blast of noise, send a TR-69 instruction to reboot. Really I'd rather they just upped the target SNRM to stupid high levels or clamped the line to 512Kbps in this instance, so I can sensibly plot the noise hits.

Flats. Neighbours above and to the left and right and diagonally so!

All lines for my block arrive in a shared underground feed. Underground all the way to the exchange.

There's also shops, residential and a trading estate on the line's route to the exchange - the noise introduction could be anywhere.

Hence why I am not rushing to action, I know this will be a slow fix having worked on the other side of the fence so to speak. I'm in observation phase

You obviously realise the size of your task.

Monitor it for a few days to look for patterns - such as exact switch on/off times, or Monday to Friday only, is there more than one source ... Talk to neighbours and even set up RSL for them to see if they have issues too.

Being in a block of flats does not make it easier. Is there a services room where everything comes in and distributed?

The telephone lines for the block arrive externally, run as a single bundle up to an external junction box at 1st floor level, from which the individual flat's lines are then distributed.

Electricity supplies arrive to a communal area under the ground floor stairs where meters and cutoffs for each flat are located.

It's a 1930's construction, so no modern comms / utility room as such. Although I do have the right to keep a coal bin in the communal hallway according to my lease docs

How close to that junction box is your master?

There is always the possibility that a neighbours line is picking up high levels of noise from something in their flat and then there is crosstalk from that line to yours.

It's about a 5 metre run from the external junction box to my master socket.

At least it does not go through another floor or another property ...

Is there anything along that run such as a plasma TV that might cause electronic noise?