June 14th 2009 Internet everywhere!
Two-way satellite Internet service involves both sending and receiving data from the remote VSAT site via satellite to a hub teleport, which then sends relays data via the terrestrial Internet. Broadband IP Satellite systems represent the ideal Internet access solution for people who are looking for high speed ISPs while living in a region not serviced by DSL, cable or other broadband Internet access technology. Satellite ISP (Internet Satellite Service Providers) do not use telephone lines or cable modems. This is what makes satellite service the logical solutions for millions of people across Europe, Midddle East, Africa, Asia and South America.
IP via Satellite offers the always-on, high speed Internet access - with no wait times to surf the net as long as your computer is on. Broadband Internet over satellite comes at faster speeds than conventional dial-up and many DSL-connections. No more tying up your phone lines, no more busy signals, no more special phone lines or cable connections to worry about: You can surf the Internet like watching your TV from the “free sky”!
Two-way Internet via satellite broadband service means that data is both downloaded and uploaded via satellite.
There are several types of two way satellite Internet services, including time division multiple access (TDMA) often called “Satellite Broadband” and single channel per carrier (SCPC), which are part of professional satellite communications systems.
The modems required for this service are often proprietary, but some are compatible with several different providers.
These types of system are generally unsuitable for use on moving vehicles, although some dishes may be fitted to an automatic pan and tilt mechanism to continuously re-align the dish.
Satellite internet customers range from individual home users with one PC to large remote business sites with several hundred PCs. There are usually restrictive time based bandwidth allowances so that each user gets their fair share, according to their payment.Each remote location may also be equipped with a telephone modem; the connections for this are as with a conventional dial-up ISP. A voice call is sent by means of packets via the satellite and internet. Using coding and compression techniques the bit rate needed per call is only 10.8 kbit/s each way.
At each VSAT site the uplink frequency, bit rate and power must be accurately set, under control of the service provider hub.