@NS
Who has given me the info that the DSLAM data is wrong?
That would be from the 4 engineers who have been on site trying to get the basic phone line working. I've traced the line with them back to a DP shared with all the other properties on the block (flats and shops); all the lines physically go back to cab 20; all the other properties in the block have records that show cab 20.
However, our place is funny; we are in a corner property, built as part of a block along the main road, the whole block being fed by cab 20; but our entrance is on the side street, and the postal address is too - and the side street is served by cab 21. The address manages to cause confusion with some parcel delivery, and it seems to have confused the BT surveyor.
The records for this address, from first survey (September) up to last weekend, said cab 21. The records for this phone number (once working, in mid November), until this weekend, said cab 21.
The engineer who finally got the phone line working made adjustments in cab 20, then went to the MDF and re-made the connections there. Bingo - a working phone line. He gave me a copy of the PCP connection data.
All of those engineers knew the PCP record was wrong, and reported it back - but the update never made it into the back-end system. All of them knew that, with the PCP wrong, the job was then built with the wrong DSLAM, giving me a port in a DSLAM I couldn't physically be connected to.
A further engineer was sent out (in early December) with "just" the task of confirming what the actual routing was. He confirmed the route through cab 20, and gave me all the connection data. It also went back to Openreach; my ISP confirmed with BTW that the new routing data was there, and would be attached to a new order, when it was placed. It wasn't.
The 2 separate engineers (or maybe 3, I've lost count) who have only come to install the fibre portion have all immediately given up, because their job was built with cab 21. They know that FTTC wouldn't work. I knew it too. One of those was ordered to re-attend (by Openreach) later the same day, as things "would be fixed", but refused. Rightly. "Things" weren't fixed.
Today's appointment was made under the promise that the new data would be attached to it, so might work. However, the routing data (as visible in the public DSL checkers) only changed after the order was placed. We (the ISP and me) think today's order will still fail, because it is likely to still hold the wrong cab identity; we'll see.
It has been a long and sorry tale.
Even worse ... the wrong PCP is 10 yards away. The right one is 100 yards away.