[LINK] web: The NBN satellite Malcolm Turnbull never wanted prepares for liftoff

[Tom Worthington]

On 29/08/15 10:39, Jan Whitaker wrote:
> ... upload of 5Mbps works ... household will need an uplink ...

Yes, the customers will have an up-link to the new NBN Sky Muster
satellites. Thas Ampalavanapillai Nirmalathas discusses the details in
"Internet in space: nbn’s plan to bring broadband to rural Australia"
but expresses some concern about how well the up-link will work:
https://theconversation.com/internet-in-space-nbns-plan-to-bring-broadband-to-rural-australia-46618

Perhaps someone can answer a question about the current NBN "Interim
Satellite Service" (ISS): Why is compression OFF by default?

The "NBN Co Satellite Operations Manual" (page 28, FEBRUARY 2015) says:
"Turn Compression On/Off (default = off) ..."
http://www.nbnco.com.au/content/dam/nbnco2/documents/sfaa-satellite-wba-operations-manual-20150223.pdf

The NBN Co "Product Technical Specification: Interim Satellite Service"
(Page 19, 14 December 2012) explains: "Enabling payload compression
risks limiting the speed of the ISS to less than the allocated peak
speed of the ISS.".
http://www.nbnco.com.au/content/dam/nbnco/documents/satellite-wba-product-tech-spec-20121214.pdf

Why would compression limit the speed of the service? Even if
compression limits the speed in some cases, would customers benefit overall?


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Tom Worthington FACS CP, TomW Communications Pty Ltd. t: 0419496150
The Higher Education Whisperer http://blog.highereducationwhisperer.com/
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Adjunct Senior Lecturer, Research School of Computer Science,
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