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Stephen - the GPON technology they are considering has a natural 2:1
ratio as part of the tech standard (2.5Gbps down, 1.25 Gbps up, shared
amongst ~32 drops in the PON), which is one consideration - and much
better than the 20:1 ratio inherent in DSL - Hence the 100Mbps down, 50
Mbps up plans. There is no technical reason why an RSP couldn't offer
something like 50 Mbps symmetric though.<br>
<br>
The next generation 10GPON has the same 2:1 ratio down:up.<br>
<br>
Business plans are expected to be much more symmetric, as well as
extending beyond 100Mbps to 1 Gbps as available customer link speeds on
day 1.<br>
<br>
NB Last I heard, the ONT is likely to have gigabit-capable ethernet
ports - so expanding even residential accesses higher than 100 Mbps is
likely to be little more than a provisioning exercise, once the backend
capacity planning is taken care of.<br>
<br>
<br>
P.<br>
<br>
<br>
<br>
On 17/06/2010 9:37 AM, Stephen Carter wrote:
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi Guys,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sorry for a possible very dumb question.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>Does anyone know of the reason why the NBN is
being released
with different Up and Down speeds?<o:p></o:p></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Some possible reasons that I can think of are
(but can’t
validate as I don’t personally agree):<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent: -18pt;"><!--[if !supportLists]--><span
style="">a)<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal; -x-system-font: none;">
</span></span><!--[endif]-->Possible cheaper CPE as transmission
strength on cheap
CPE is more attainable<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent: -18pt;"><!--[if !supportLists]--><span
style="">b)<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal; -x-system-font: none;">
</span></span><!--[endif]-->Transit Costs (can’t understand why at
this scale)<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent: -18pt;"><!--[if !supportLists]--><span
style="">c)<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal; -x-system-font: none;">
</span></span><!--[endif]-->Limitations of their chosen design<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Please be gentle <span
style="font-family: Wingdings;">J</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks<o:p></o:p></p>
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