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VSATs are small earth stations (normally 1.2 - 2.4 meters) that are utilized for reliable transmission of data, voice and fax via satellite. VSAT Terminal Equipment consists of two units - an indoor unit and an outdoor unit. The outdoor unit is placed outdoors for a line-of-sight to the satellite and the indoor unit interfaces with the user's communications device (e.g. data terminal equipment). The outdoor unit consists of a small antenna, mount and electronics for signal reception and transmission. The indoor unit consists of a satellite modem and
demodulator(s) and a network access device to interface with data LANs and PBXs.
The VSAT Network could operate in a STAR or MESH arrangement with the satellite bandwidth being dedicated for each remote link analogous to a leased line and this arrangement is known as "Single Carrier Per Channel" (SCPC) Configuration. This type of configuration is used in continuous streaming data applications. |
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The Advantages of a VSAT Network
- A VSAT Network can be provided through a lease arrangement with fixed transmission costs regardless of distance. This provides for substantial communication cost savings.
- The user retains complete control of the way information is communicated within the network. This generates flexibility, particularly where new VSAT sites need to be added, or existing sites need to be moved or removed from the network.
- High availability and excellent transmission quality is provided by the VSAT Network. VSAT Networks also guarantee the highest performance levels (99.5%) among all communication alternatives.
VSAT Networks provide fast data transmission for POS applications to improve customer service.
- VSATs can be installed anywhere the business has a site irrespective of the terrestrial communications infrastructure.
- VSAT Networks offer - a single vendor for equipment service, installation & maintenance of the entire network.
- VSAT Networks offer superior flexibility and performance. Adding a site is quick and easy, and higher network availability levels are easy to obtain.
- VSAT as a broadcast medium supports business objectives to improve customer service and quality. Reliable data broadcast, audio broadcast for in-site music and video broadcast for sales training are all available on a single platform.
- Prices of VSAT Networks compete favourably against terrestrial alternatives including dial-up. The costs are predictable and stable.
- VSAT Networks can be secured with VPNs (Virtual Private Networks) using industrial strenght encryption.
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Gescof Global Network VSAT ServicesG.G.N provides best of breed VSAT technology by implementing Frame Relay networks over SCPC satellite links to handle voice, fax and data communications. A customer's network can be configured as a STAR or MESH network. The network supports data applications as well as voice with ACELP II or ADPCM compression. The data network handles a wide range of protocols from user devices including legacy SNA/SDLC, Async, 3270 Bisync, HDLC and X.25; Frame Relay; LAN traffic, both Ethernet and Token Ring; or analog and digital voice, fax and video data. Speeds supported are 64 Kbps up to 2.048Mbps
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