I’m not familiar with this equipment. A device whose operation is triggered by some state sensor input, such as a level sensor, would fit our requirements for guilt perfectly here. A good suggestion.
There remains as usual the mystery of “why only line x?”: Line 1 and line 4 have no upstream SNRM variations and line 3 has a diurnal simple, straightforward square wave variation with a 24-hour period, as discussed many times earlier. (Mind you, today line 3 has had no square wave at all.) How can the location/physical placement of the copper lines be so very different?
I’m presuming that at least nowadays I do have an E-side, although I may have had no such thing at all given that we thought I had EO lines. When I say E-side I’m thinking of an arrangement with extremely long D-side though. I’m also assuming that when FTTC became available in the Broadford area that could be the first time I ever had a PCP (?) so it may be that a lot of things changed and that would have been about two or three years ago.
In that E-side run, there is a school, a supermarket and petrol station, a hotel and some houses and one or two shops. There is a pub/restaurant ‘The Claymore’ near to the PCP, although I would say that that is nearer to the D-side. So there are opportunities to park various kinds of electrical equipment.