Did you hear the HH4 syncing up at 1min into the audio clip LOL, it dropped the connection when doing the quiet line test, so something isn't right.
Another classic symptom.
Well when I phoned BT the start of December last year with this issue I told them everything that I replaced, i.e. I replaced the NTE5A xDSL MKIII Filter with a brand new one along with replacing all the phone extension cables that I was allowed to touch, leaving the cable going from the BT80B to the NTE5A Master Socket, they did some tests their end and did say the fault wasn't in our home but in the BT Network itself (was loosing the PPP connection while keeping sync), and where after the line was reset it was all fine for a month or two where it plays up again.
Now for the last month or two we are loosing sync as well so it must be a line issue due to we are still hearing the odd crackle, granted it hasn't been as bad as it was in that audio clip which was taken Dec 11th 2015.
TBH this line issue has been happening on and off since we joined BT, when we was with Zen our connection was stable around either side of the fence of 6 Mbps and no line noise what so ever, and of course our line card got released when we left Zen, got dumped on ADSL Max due to no ADSL2+ Line cards available, and while on that we had no line issues, only when we got put on the ADSL2+ Line card started having issues, it got to a point where I think the replaced the Line card at the exchange with another one, which was better but still had issues.
Basically this is how its all connected up...
- The line comes into our house into the first BT80B Junction Box half way up our wall (yes we have two of these, I will explain later why)
- That then goes into the second BT80B Junction Box on the skirting Board.
- It then uses 1 pair of twisted cables (I think CW 1308) down from the skirting board under the carpet along under the door to our hallway where the NTE5a Master Socket is located and is connected to it.
- Now on the Phone Face Plate we have two sets of wires coming from it.
- One goes back down that Cable linking the 2nd BT80B Junction Box and the NTE5a Master Box using the 2nd pairs, and at the 2nd BT80B box they have Gel Clamped it to a phone cable to out main Phone Base.
- That 2nd cable from the Phone Face Plate goes onto a splitter for the downstairs and upstairs phone lines (we have 4 Sky HD Boxes that needs to connected to the phone line.
- The xDSL MKIII Filter Plate has a CAT5e cable from its internal 2 Pin IDC connector going under the floor up to under our stairs where it goes upstairs to the middle of our house where its connected to the HH4A via a short home made cable (CAT5e) with a RJ11 one end and a RJ45 the other.
That's how its wired up, TBH if I was allowed to touch that cable between my cable (link between the 2nd BT80B and my NTE5a Master Socket) then it would of been done better and neater.
Oh BTW the NTE5a and the cable between the two are mine, NTE5a got burnt out during a thunder storm about several years back where the static discharge killed some thing tracks on the board, BT said we would be charged due to its an internal faults so I just brought one from amazon along with a reel of CW1308 from RS and just replaced the lot from the BT80B Box, and it was fine for many years while with Zen without any issues on the line, I think I had posted all this in another post on these forums.
And yeah I know its a waste of time having the line reset every time it gets bad (i.e. every couple of months) but I would rather do that then have to pay the £130 callout charge when they find nothing at that time.
Maybe you should be seeing if BT retail will raise a Boost task, you shouldn't be paying for that, and hopefully you'll get an engineer who listens.
What's a Boost Task?
TBH we have had some nice engineers in the past, sadly some of those were contractors like Kelly's for example, one of those guys didn't want to either tack the cable round the door frame, neither did he want to pull up two floor boards to lay the cable beneath the floor, no he just placed the cable loose under the carpet, so after a year or two of people walking through the door of the room people sometimes steps on the cable splitting the sheath of the cable and it now untwisted there.
We will see what happens with the so called estimated date of End of Feb + 2 weeks updating the database and for to get activated before I progress this, because FVA doesn't use any of the copper line, so no point wasting money and time on something that doesn't get used and becomes redundant.