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قديم 02-10-2006, 01:03 PM
El-Moftary El-Moftary غير متصل
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تاريخ التسجيل: Oct 2006
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In the last few years satellite began to be applied in Internet networking, mainly by medium-big ISPs and we have seen it diffused between users. Sat connections are a very different kind of networking than terrestrial ones, with different timing such as higher RTT (round trip time), but also with different bandwidth value.
SkyBroadcast provides very high quality 1 way connection 1MB speed to 55 MB with very low price. Check more about service and features we can provide for you.

How it works:



So first you make the request (1) (using DSL or even Dial-Up connection) to the Sat-Server, after it will retrieve out info from Internet (2) and it will send it to Satellite (3); in the end you would receive data from the it (4) to your home using a parabolic antenna and a Sat Card.

To install satellite system you need:
Sat card
Parabolic antenna
One or more feed (converter)

VSAT is based on TDMA + SCPC tech.:

TDMA
Short for Time Division Multiple Access, a technology for delivering digital wireless service using time-division multiplexing (TDM). TDMA works by dividing a radio frequency into time slots and then allocating slots to multiple calls. In this way, a single frequency can support multiple, simultaneous data channels.

SCPC
Short for single channel per carrier, a VSAT satellite transmission system that uses a separate carrier for each of its channels. SCPC is used for broadcast data and full-duplex audio/video communications. In an SCPC system, transmissions are sent to the satellite continuously on a single satellite carrier. The satellite signal is received at a single location, in the case of a point-to-point system, or at many locations in a broadcast system, providing hubless connectivity among multiple sites.

SkyBroadcast provides 2 ways satellite connection as well. Such connection costs more but it doesn't depend on terrestrial connection (DSL or Dial-Up). Also, in this case you have hi speed connetion for both directions the downloading and the uploading.