Tuesday, December 9, 2008

Satellite Internet















As Internet traffic continues to grow at exponential rates worldwide, Internet services providers (ISPs) everywhere are faced with the challenge of keeping up with demand for network bandwidth and developing creative solutions for squeezing more use out of existing bandwidth.

Satellite communication has the unique ability to deliver bandwidth exactly where and when it is needed, irrespective of geography and local infrastructure.
Depending on the location and needs, Internet via Satellite is the best method for either by-passing or extending the terrestrial fiber optic network.

Internet via Satellite is therefore becoming the natural high speed transport medium for a wide range of IP and multimedia applications the world over, whether for consumer or business applications - and at speeds of 2 Mbit/s per user for Internet access and at up to 40Mbit/s per transponder for services such as data broadcasting.


How do you access the Internet other than dial-up if you live too far from a phone company office for DSL and there is no cable TV on your street? Satellite Internet access may be worth considering. It's ideal for rural Internet users who want broadband access.

Satellite Internet does not use telephone lines or cable systems, but instead uses a satellite dish for two-way (upload and download) data communications. Upload speed is about one-tenth of the 500 kbps download speed. Cable and DSL have higher download speeds, but satellite systems are about 10 times faster than a normal modem.

Firms that offer or plan to offer two-way satellite Internet include StarBand, Pegasus Express, Teledesic and Tachyon. Tachyon service is available today in the United States, Western Europe and Mexico. Pegasus Express is the two-way version of DirecPC.

Two-way satellite Internet consists of:

* * Approximately a two-foot by three-foot dish
* * Two modems (uplink and downlink)
* * Coaxial cables between dish and modem

The key installation planning requirement is a clear view to the south, since the orbiting satellites are over the equator area. And, like satellite TV, trees and heavy rains can affect reception of the Internet signals.
Two-way satellite Internet uses Internet Protocol (IP) multicasting technology, which means up to 5,000 channels of communication can simultaneously be served by a single satellite. IP multicasting sends data from one point to many points (at the same time) by sending data in compressed format. Compression reduces the size of the data and the bandwidth. Usual dial-up land-based terrestrial systems have bandwidth limitations that prevent multicasting of this magnitude.

Some satellite-Internet service still requires you to have a dial-up or cable modem connection for the data you send to the Internet. The satellite data downlink is just like the usual terrestrial link, except the satellite transmits the data to your computer via the same dish that would allow you to receive a Pay-Per-View television program.

So, if you are in a rural area and you want broadband access to the Internet, satellite Internet may be for you!

8 Comments:

creativekona said...

Meenu ji;
Apne sattelite internet ke bare men bahut achhee jankaree dee hai,lekin jin grameen upbhoktaon ko ap ye jankariyan dena chah rahee hain vo log english men kitna yah lekh padh payenge?
yadi yahee jankaree ap hindi men den to shayad apko ek bada pathak varg milega.
Lekh ke liye badhai.Maine apne blog se word varification hata diya hai.
Hemant Kumar

Zakir Ali 'Rajneesh' said...

रोचक एवं उपयोगी जानकारी।

Arvind Mishra said...

Educative!

dr. ashok priyaranjan said...

nice post

http://www.ashokvichar.blogspot.com

Anonymous said...

I came to your blog for the first time today and enjoyed it very much. There is much scope for this kind of a blog.

I have a similar blog, but devoted to physics alone at physics4u.info but I am yet to develop it seriously.

A few suggestions for improvement of your blog:

1. The header should preferable made a bit smaller and a bit less obstructive

2. The fonts MUST be in Verdana 10.

3. More margins should be given between pictures and text. This can easily be done with the help of Windows Live Writer

Keep writing. You have a good grip over the subject, and a very good way of communicating!

Shastri
www.Sarathi.info

Shastri said...

My Comment above has been posted as "anonymous" due to a technical mistake during posting.

K said...

Nicely presented

K. Mohan(Mohan sanjeevan)

Morty said...

Really, ISP's have offered one of the best internet service ever and that's by means of satellite internet. It's fast and could also be mobile for people that's always on the go.