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Back in mid January, we exclusively revealed details of BTYahoo's intended "advisory"
1GB daily cap on what we thought would be limited to the ISPs 1Mbps
service. The advisory cap however, is to be applied to all of the BTYahoo
consumer offerings including 512Kbps services. The cap will not apply to any
of the business based products.
At the moment, BTYahoo will not be taking action to enforce the cap on its subscribers, although the
ISP notes that it has not ruled this out for the future.
The following advisory statement appears in the BTYahoo FAQ
| BT Yahoo! Broadband products have been designed for optimum performance if you download up to 1GB of data per day. This is equivalent to approximately 10,000 images, 650 30-second videos, or 200 music tracks a day. This is the typical usage profile of all but a very small percentage of our broadband customers, and we are not able to guarantee download amounts above this level. If you want to regularly download more than 1GB of data per day, then we would suggest BT Yahoo! Broadband products are not appropriate products for your needs.
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| BTYahoo FAQ
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BTYahoo technical support engineers have obviously been briefed on this situation, and will cite that
a 1Gb cap is actually more than the theoretical minimum that any of the ISPs products are capable of anyway.
Citing BTYahoo's own maths ...
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The theoretical minimum daily download capability supported by the BT Yahoo! Broadband 512kbit/s products is therefore 512kbits divided by 50 [due to contention], multiplied by the number of seconds in a day. I.e. 10Kbits x 60 x 60 x 24 = 864Mbits or 108MB (i.e 864 divided by 8 to convert from bits to bytes). The amount is double (316MB) for the 1Mb product
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| How BTYahoo justify the 1GB a day |
Its certainly not possible to argue against the math that BTYahoo use, and using
the same math, its possible to see that subscribers of the 512Kbps product would hit
the magical 1GB a day value, when their connection is shared with just 5 others users
at the exchange, due to contention (sustained rate of around 100Kbps all day) or
10 users on a 1Mbps service.
Its inevitable that BT will migrate the "advisory" into "mandatory", and kudos must be
given in this instance of forewarning their customers.
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