So previously the pair AND the port have been swapped out ? So then unless it went from duff port to duff port, that really should have fixed it ?
Yes, but bear in mind there's never only one split pair
Were tests made at the DP last time ? Could it be that the other pair in the building is dominant and messing with this one over the underground length ?
The DP's external at first floor level between the two offices and the multipair feeding it runs over the roof. No tests were done at the DP.
I wish I could come and have a play, I do enjoy a challenge that others have failed at, it buffs my smugometer
I wish you could come and play too. I like a good challenge as well
Back in about 1997 I had a dual ISDN2e into my office in central London for internet access. It was a new installation and nothing I or the ISP did could get it working with internet. BT kept coming out and kept telling us it tested fine.
Several months down the line, and having swapped out the Cisco routers at both ends several times, I persuaded BT to send someone to do an end-to-end test as that seemed to me to be the logical thing to do. We got their top ISDN engineer from the Mayfair exchange. He really didn't believe there could be a BT fault and said "All thiis is going to do is prove it's your kit that's faulty" - which I thought a bit
His next words were; "My gawd, this line's so bad I can't even get voice down it"
It turned out there was a major fault somewhere at the bottom of Telecom Tower and it was affecting lots of customers and BT hadn't been aware of it.
We got so much compensation that it paid for a 2Mbps leased line - which wasn't cheap back in 1997.