[AfNOG] Ku-band that is good for west African - Nigeria

[Sunday Folayan]

Paul,

<SHAMELESS PLUG>
If you do need a reliable ISP in Nigeria, Please lets discuss commercials 
off the list. That is my business.
</SHAMELESS PLUG>

Thanks.

Sunday.

At 09:41 AM 1/21/2005, William Stucke wrote:
>Hi Paul,
>
>I'd suggest that you follow Sunday & Brian's advice - pay someone to make 
>the decisions for you. VSAT isn't a simple subject, and deciding which 
>band, which satellite, which satellite provider and what size dish are all 
>inter-related issues. There isn't one right answer, but there are many 
>wrong answers!
>
>The information you need to provide to your consultant includes: -
>
>1    Your exact location
>2    How much bandwidth you require, both upload and download
>3    What QoS (Quality of Service) you need. Simply put, "better", more 
>reliable services cost more. Is a reliable service more important to you, 
>or is a cheaper service more important?
>4    What is your budget for capital expenditure, and as an ongoing cost.
>
>Your consultant will then be able to advise you on: -
>
>a    Whether to use C or Ku Band
>b    Which satellite to use
>c    What bandwidth capacity to install
>d    What size dish to install
>e    What additional equipment you will require.
>f    A suitable local contractor to carry out the supply and installation 
>of the equipment.
>
>You will need to pay the consultant for his time, answer all his 
>questions, and listen to his advice ;-)
>
>Kind regards,
>
>William Stucke
>ZAnet Internet Services (Pty) Ltd
>+27 11 465 0700
>William at zanet.co.za
>-----Original Message-----
>From: afnog-bounces at afnog.org [mailto:afnog-bounces at afnog.org]On Behalf Of 
>Paul
>Sent: 21 January 2005 09:23
>To: Sunday Folayan; Ayitey Bulley; afnog at afnog.org
>Subject: Re: [afnog] Ku-band that is good for west African - Nigeria
>
>Hello,
>Thanks so much 4 ur advice on dis issue.
>Pls what of the case of using a 1.8M dish for a C-band, there are some 
>VSAT proposal I have wit 1.8m dish C-band and someone told me will not 
>work fine, any problem in dat or what can u say to dat?, and what is the 
>problem is we use a 2W or 5W BUC is dat defective effect on dis?. my 
>problem is just dat most ISP here are not really giving the best service 
>so we are looking for a good VSAT connection dat will serve better 
>compared to the ISP guys cos we are not looking forward to be an ISP what 
>we want is just to be able to do ur business and serve ur customer better 
>wit good services.
>Thanks,
>AJ
>Sunday Folayan <sfolayan at skannet.com.ng> wrote:
>Hello Paul,
>Your question is like asking .... "Which car is the best".
>If what you want is acceleration .... car manufacturers will tell you ....
>my car does 0 to 100km in X seconds.
>If what you want is fuel economy ... car manufacturers will tell you ....
>my car does Xkm per litre.
>If what you want in space ... car manufacturers will tell you .... my car
>has X Cubic meters of space.
>etc etc etc. The car that will accelerate very fast, may obviously guzzle
>more fuel. Best is thus subjective.
>Back to satellite Communication:
>Ku Suffers from Rain Fade. Now it so happens that it rains sooooo much in
>Port Harcourt, but does not rain that much in Kaduna. Both are in Nigeria.
>I will thus not advise that Ku equipment be used in Port-Harcourt, but of
>course, you can get away with it in Kaduna. Again, subjectivity.
>Footprint? The Measurement is EIRP. It is measured in dbm. The figures are
>read from contours, from maps for each satellite on each of the providers
>websites. It so happens that the EIRP again depends on where you are, and
>its not a single value for a whole country. Study the contour for the
>satellite you want to connect to, for where you are, to see which
>satellite has the highest.
>You can boost the final EIRP recieved, by stepping up the size of the
>Antenna. For example, a 3.8M Antenna receives stronger beams than 2.4M
>antennas. I will not touch a 1.8M dish, for C band ... Your link budget
>margin at that dish size is a bit low. You thus can get a better
>performance, by using a bigger antenna.
>Which Solution? Again ... you need to look at the specs.
>For example, I use Skyvision, which has a 40M/Symbols DVB beam. The
>pentamedia works only up to 30M/Symbols. It so happens that it is very very
>affordable, but I can no longer use it with my provider, who now have a
>huge 40M/Symbols. ... so pentamedia is not the best for that provider.
>All in all, the best is pretty subjective. Please study the specification
>sheets, and then call your own shots. If it is too tough, spend some money
>... pay someone to do it ;-).
>Regards ...
>Sunday.
>
>At 12:36 AM 1/18/2005, Paul wrote:
> >Good say all.
> >Pls I need your advice on the best ku-band vsat satellite system dat is
> >good for west african - especially nigeria.
> >Again which footprint is the best among intelsat , shiron, panamsat and
> >gilat?.
> >thirdly, which solution is the best between IPsat, shiron gateway and
> >pentamedia?.
> >thanks
> >AJ
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