[LINK] "Line spectrum sharing" ? (Telstra offers separation proposal)

[Paul Brooks]

On 2/08/2011 8:11 PM, Fernando Cassia wrote:
> On Tue, Aug 2, 2011 at 03:52, Richard Chirgwin <rchirgwin at ozemail.com.au> wrote:
>> LSS is the service under which Telstra retains the lower frequency
>> (voice telephony) and the ISP gets the higher frequencies (ie, DSL). I
>> think.
>>
>> RC
> Thanks Richard. I wasn´t aware that such scheme was even possible.
>
> Do you know if LSS is applied in other countries too? until now I
> thought that an unbundled line meant a total loss of the customer from
> the POV of the incumbent.
Fernando - In a quick-and-dirty web search I've found references in a number of other
countries, using a search for "spectrum sharing local  loop" and ignoring all the
references to wireless local loop.

India -
http://www.icrier.org/pdf/16apr10/Panel%20Discussion-%20Prof%20Sidharth%20Sinha%20-%20Presentation.pdf

European Union (excerpt from "Encyclopedia of Multimedia Technology and Networking Vol
1" by Margherita Pagani) refers to  EU Regulation EC No 2887/2000) which recognises
three arrangements for un-bundled local access services - full unbundling, shared
access aka "spectrum sharing", "bandwidth sharing" or "line splitting", and bit-stream
access

Portugal - http://www.anacom.pt/render.jsp?contentId=920284 "What are the main
variations in LLU collocation" describes "Shared Access"

...and they were just on the first page of results.


This lets (usually the incumbent) to continue to provide baseband dialtone and
telephony, even though another service provider provides the broadband service.
If you think about it, it is exactly the network technique that the incumbent usually
uses to add DSL broadband to their existing local loop plant - they use the same
splitters/filters. Spectrum sharing is simply recognition that the incumbent's DSLAMs
aren't the only ones capable of driving the high frequencies down the copper line.

P.