[AusNOG] Au > South Africa Customer Link

[Greg McLennan]

Having some experience on this...
If latency isn't a big issue and depending on how $ you have to spend on 
the link per month, you can go a contract with a C-Band satellite 
provider(using a typical global beam off the bird).
There are a few satellites around 91 degree's east e.g Measat3 and can 
do a single hop from East cost of Aus to South Africa on 1 hop ~550mS  
round trip. (This Is still good enough for a voip/vtc call(250mS each 
way! )..
There is  a bit of investment with the ground station 
dishes/modems/block up converters(amplifiers) depending on your 
bandwidth requirements.
IP Sat modems over the last 5 years have got some good modulation 
schemes and technology with the efficiency per Hz is dam as opposed to 
gear ~10years ago.. (Google carrier-in-carrier / doubletalk type modems 
~40% more b/w efficient).
e.g 
https://www.comtechefdata.com/files/articles_papers/WP-Doubletalk%20Carrier-in-Carrier%20&%20CDM-625%20White%20Paper.pdf

Take a look at this typical C-band  GLOBAL satellite footprint for 
measat. Global beams for sat providers roughly = 1/4 to 1/3 of the 
planet depending on their antenna configs & tx power etc!!
https://www.satbeams.com/satellites?norad=35362
<http://www.dxsatcs.com/sites/default/files/satellite/91-5east-c/Measat%203%20at%2091.5%20E%20_%20Global%20footprint.jpg>
Cost per MHz-per month is a consideration(contracts typically reduce in 
price if you take them over a longer term!!). You'll want a 5 to 7meter 
or bigger dish(depends on your bandwidth requirement(the more b/w, the 
bigger the dish & (and amplifier!))
and your look angles from Aus & Africa ~20 degrees(depending on where 
you are(typically if look angle <15degree's to the satellite then, don't 
bother !).

With sat comm's, at the end of the day, you have full control over your 
link and you don't have to go chasing fiber-carrier providers.
You could always carry other peoples traffic at a $, if your bandwidth 
isn't fully utilized !!

Cheer
Greg..



On 18/12/2017 8:08 PM, Ian Henderson wrote:
> On 18 Dec 2017, at 3:14 pm, Cameron Murray <cameron.murray at gmail.com> wrote:
>> I've been asked to entertain the idea of a customer of ours needing a dedicated link between their Australian branches and their head office in ZA.
> Have a bit of experience with this route via a few different carriers. SMW3 Perth to Singapore, TIC across India, SAFE down the coast of Africa. Others have covered most of the things I’d recommend, but my best suggestion is to look into WAN acceleration products. We used Riverbed - the improved user experience of the usual MS suite and SSL web apps ZA -> AU was great. Of course the benefits depend on how the app works - an intermediate jump host in AWS Singapore might provide ‘good enough’ performance gains compared to the cost of a WAN acceleration platform.
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