Copper Link A Link B
CP <-----------------> CABINET <--------------------------------> EXCHANGE <----------> HAND-OVER <--------------> BT RETAIL
<--------------> ISP A
<--------------> ISP B etc etc
This musing is just based on a BT Wholesale provided service (not LLU)
In the above over-simplification of a VDSL scenario,
- are "Link A" & "Link B" just fat pipes that are unfettered i.e. they in no-way care which ISP the traffic "belongs" to, or
- is a specific capacity/rate level effectively purchased by the ISPs for these links ? (and hence they are effectively limited on an ISP basis) ?
Considering a single customer, these Links only inherently have to deal with as much traffic as the customer's VDSL sync speed and the ISPs backbone will allow (being the join between the two ends), but I was just curious if the ISPs choose (and pay for) a capacity level specific to these links, or if they are just fat-pipes that all ISPs have equal access to on a first-come, first-served basis ....
edit - oops - this should probably be in the broadband technology section - sry