Hi Mark,<br><br><div class="gmail_quote">On Wed, Aug 11, 2010 at 10:59 AM, Mark Smith <span dir="ltr"><<a href="mailto:nanog@85d5b20a518b8f6864949bd940457dc124746ddc.nosense.org">nanog@85d5b20a518b8f6864949bd940457dc124746ddc.nosense.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Hi Tom,<br>
<br>
If the typical family in Australia has 2.4 children, rounding that up<br>
to 3, that means in the slightly above average case there are 5 people<br>
living in a residence. If each of those people wants to conduct a high<br>
definition video conference at the same time, that is approximately 5 x<br>
8 Mbps symmetric bandwidth [0], or 40Mbps. That is of course peak<br>
bandwidth, and worst case. 3 children is not that common, and I think 5<br>
concurrent HD video conferences is even less likely to happen. However,<br>
it is a feasible and possible use case.<br>
<br>
So what is the other 60Mbps for?<br></blockquote><div><br>I see that close to 30% utilisation across some (others have close to 10%) of my DSL links is just Internet background radiation.<br><br>And it seems the bigger the link, the larger the amount of radiation received.<br>
<br>You also seem to be assuming that everything is initiating things on their links all the time. Guess what. Speaking from a domestic setting - I have no control over what time of day my Wii decides to downloads new upgrades / news items etc.<br>
<br>I assume things will be even less predictable when TV providers decide to 'pre-stream' shows to a bunch of households as well. <br><br>A<br> </div></div>