page_title: Satellite Internet access
section_title: Two-way satellite-only communication
hierarchical_section_title: Satellite Internet access / Two-way satellite-only communication
caption_attribution_description: This is the back panel of a WildBlue Satellite modem. I took this picture in March of 2006. Jesster79 04:39, 3 March 2006 (UTC)
context_page_description: Satellite Internet access is Internet access provided through communications satellites. Modern consumer grade satellite Internet service is typically provided to individual users through geostationary satellites that can offer relatively high data speeds, with newer satellites using Kᵤ band to achieve downstream data speeds up to 506 Mbit/s.
context_section_description: Home or consumer grade two-way satellite Internet service involves both sending and receiving data from a remote very-small-aperture terminal (VSAT) via satellite to a hub telecommunications port (teleport), which then relays data via the terrestrial Internet. The satellite dish at each location must be precisely pointed to avoid interference with other satellites. At each VSAT site the uplink frequency, bit rate and power must be accurately set, under control of the service provider hub.
  There are several types of two way satellite Internet services, including time division multiple access (TDMA) and single channel per carrier (SCPC).  Two-way systems can be simple VSAT terminals with a 60–100 cm dish and output power of only a few watts intended for consumers and small business or larger systems which provide more bandwidth. Such systems are frequently marketed as "satellite broadband" and can cost two to three times as much per month as land-based systems such as ADSL. The modems required for this service are often proprietary, but some are compatible with several different providers. They are also expensive, costing in the range of US$600 to $2000.
  The two-way "iLNB" used on the SES Broadband terminal dish has a transmitter and single-polarity receive LNB, both operating in the Kᵤ band. Pricing for SES Broadband modems range from €299 to €350. 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—but these are more expensive. The technology for SES Broadband was delivered by a Belgian company called Newtec.
caption: The back panel of a satellite modem, with coaxial connections for both incoming and outgoing signals, and an Ethernet port for connection
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