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by pyre 5612 days ago
What is the section between the DSLAM and PoP? Why does Bell need to charge usage-based on that section seeing as the peering itself is not the issue? Some more explanation of that part of the diagram would be much appreciated. :)
1 comments
Swannie 5612 days ago
Umm... that's the bit between your local exchange (Central Office) and the nearest Bell exchange (Central Office) to where the ISP actually hosts its equipment. (In the case of the GAS, that equipment is routers that can talk PPP/L2TP, or something close, as I can't find real technical details on GAS). OK, so it is more complicated than this as there are BRAS - broadband remote access/aggregation servers - along the way that collect the DSLAM traffic together into ATM links, and the split out aggregated traffic for the ISPs. (Basically the internal Bell ATM packet network).

This is Bell's transit network. Whilst technically the UBB is on the individuals and not what is transited, it is essentially what is being billed for.

Bell is claiming that it's links on the transit network are being crippled by heavy users. This may actually be true during busy hour. But in reality this shouldn't happen, as Bell can increase the bandwidth of most these relatively cheaply, as most are fiber. There are probably a few 100 that aren't fibered, causing the biggest problem.

But OK. The more I read about this, the clearer it becomes that the problem doesn't really exist at the moment. This is Bell's way of sabotaging the GAS product that it has been forced to sell by the regulator.

I hope this is a move that will force the independents to group together to purchase their own DSLAMS and transit. And then Bell faces much stiffer competition. In the UK, BT is facing real and consistent competition, thanks to our regulator getting tough in the last few years. BT now even have to allow competitors to lease it's ducting to roll their own fiber.

EDIT: I found this: http://www.vaxination.ca/crtc/ADSL_intro.pdf

Which suggests that the only bit that could conceivably have contention, which the wholesale customer does not control, is the connection between the DSLAM and the BAS. From the BAS's to their handoff PoP/CO, they have to pay for these "AHSSPI/AHSSL (Aggregated High-Speed Service Provider Interface/Link)" in 1gbps increments.

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