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  Reply # 281380 11-Dec-2009 03:23 Send private message

cbrpilot:

The author does not seem to understand that ISPs sell 'best-efforts' grade services. What this essentially boils down to is that contention ratios are a fact of life. They rely upon the fact that not everyone is online at the same time, and not everyone is trying to back up the Internet at the same time. By and large this concept works. What ISPs are saying is that the 'hogs' will use far more (at least an order of magnitude more) than your average punter. This places the ISP in an unenviable situation - either they increase the cost of the service for everyone, or they put measures in place to make sure that everyone gets a fair share of the pie.



Yup in NZ ISPs who wholesale DSL off telecom pay for xx kbps of bandwidth per user, 24, 32 or 40 i think it is  kbps for UBS/UBA, and 180 or 240 i think for EUBA.
What this means is that if your ISP had say 1000 users, you'd only be able to transfer at the rate you're purchasing per user * # of users at any given time. Thankfully not everyone uses the net at the same time which is why even with a allocation say 32kbps per user you can get full line speeds, but I wouldn't be suprised if a number of NZ ISPs are hitting their handover link allocation as a result of their customer demographics at certain times of the day (I'm just guessing this last part and don't know of any who actually are)




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  Reply # 281532 11-Dec-2009 15:03 Send private message

Is it really per ISP like that? I thought it was a minimum CIR per user, between the DSLAM and the ISP Handover?

The original text from the comcom determination (original one has probably changed since they added 40 kbs):

3.11 - Throughput

99.9% probability of providing to any provisioned End User a minimum uplink and downlink average throughput of 32kbps during any 15 minute period on demand

3.12 Note:

3.12.1 The service specifications relate to the Basic UBA Service performance from the
ETP to the Handover Point,

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  Reply # 282446 14-Dec-2009 19:18 Send private message

If it were per user, we'd all be at dialup. It's at an aggregate level, based on the number of users provisioned.




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