[Tezcatlipoca]

Originally Posted by JohnHorb

Hopefully, someone more knowledgeable will be along in due course, but from other posts here, and assuming the Dublin setup is the same as here, I think the term is 'UBR congestion'. I stand to be corrected, but I think the 'UBR' (Universal Broadband Router?) is a card in the green cabinet which handles a certain number of subscribers. If there are too many active subscribers on a UBR, you get congestion, and NTL will, at some point, install another UBR and split the subscribers between them. It sounds like this is your problem, but I'm no expert!

AFAIK it's not in the green cab, but apart from that, I think you've hit the nail on the head.