What is VSAT in the Computer Network?
VSAT represents a Very Small Aperture Terminal. It is a two-way satellite ground terminal
with a dish wire that is lower than 3 meters. It is generally used to transmit narrowband
data (point of sale transactions such as credit card, polling) or broadband information (for
the provision of satellite internet access to remote areas, VOIP or video). It is also used
for mobile communications.
Features of VSAT
- Band L has a Bandwidth of 15 MHz where Downlink frequency is 1.5 GHz, and
Uplink frequency is 1.6 GHz. For Band S, Bandwidth is 70 MHz where Downlink is
1.9 GHz, and Uplink is 2.2 GHz.
- Band C having frequency 3 to 7 GHz. The delivered power is low, and the rainfall
effect is minimum.
- Band Ku having frequency for Downlink frequency is 11 GHz, for Uplink frequency
is 14 GHz. The delivered power is medium, and the rainfall effect is medium.
There are various advantages of VSAT, which are as follows:
- Availability − It can deploy VSAT services anywhere.
- Diversity − It offers an entirely independent wireless link from local infrastructure, a good backup for disaster recovery.
- Homogeneity − VSAT enables us to give the same speed and strength at all
- Security − The connection is secure as there is a private layer of the network over
- Affordable − The pricing is very affordable.
- Acceleration − Most modern VSAT systems use the onboard acceleration of TCP
protocols, HTTP. This delivers high-quality internet performance.
The disadvantages of VSAT are as follows−
- Latency − VSAT technology uses satellites in geosynchronous orbit. It takes a
minimum latency of 500 milli sec. Poor choice for online gaming.
- Installation − It requires an outdoor antenna. This makes installation a big
Published on 04-May-2021 13:56:11