I have problems with my DSL connection dropping out randomly, especially evenings and also sometimes when the connection is stressed. Sometimes it drops when on a land line voice call. It might be once a day or it might be six times an hour for an entire evening.
I am on just under 3km of aluminium cable all the way back to the fastest (fibre enabled) exchange in my area. For part of the route it runs alongside a light railway and passes a substation. All the rest of the area has FTTC but we are not due to get a green box at the end of the road until sometime after hell freezes over.
My ISP (PlusNet) has been very supportive so far, but they are dependent on BT wholesale, who seem to have only one setting - send an engineer to plug in the box of tricks. They then say something like, "Line quality isn't great, I've seen no drop outs in the 20 mins I've been here (quelle surprise!!) and I'll refer it to the underground team" Tomorrow will be my 7th engineer visit. To my knowledge, or PlusNet's, the underground team have never been involved. On one visit a couple of engineers went back two manholes and re-did the jellies but that's it.
In terms of numbers: my downstream loop loss is 57.5 dB, my downstream power is 18 dBm, downstream SNR can be as low as 6dB but today is sitting at 14dB. My neighbour, who is with a different ISP but has the same problem is showing similar numbers. My modem keeps telling me the line is unstable and it's doing what it can to keep the show on the road.
In terms of actions so far: I'm on my third modem (an ASUS DSL-N66U). All internal extension cables have been disconnected and I'm working on a modem router and DECT phone plugged directly into the Openreach type 3 face plate they fitted; So whatever the problem is it's outside my home. Also, I've had a pair swap (from 9 ohms to a 1 ohm pair) and the outside box, incoming cable and jellies have been changed twice.
The only result of recent "adjustments" at the exchange is another drop in my speed. I had a best case of 5.7Mb and more recently 4Mb, but it's down to 2.8Mb since the last fiddling at Christmas. I'd settle for such poor speed if only the connection was stable.
So that's my tale of woe. My question is, what do I do next?
Playing with computers since the days of CPM and writing stuff in assembler.