VSAT- Very Small Aperture Terminal

By - FSET;USTC Student.

1. A Very Small Aperture Terminal (VSAT) is a small telecommunication earth station that receives and transmits data, video or voice via satellite . It is a satellite-based Wide Area Network ( WAN), with centrally managed hub . The “Very Small” component of the VSAT acronym refers to the size of the VSAT dish antenna-typically about 60 cm to 3.8 m . What is VSAT ?

2. E arth segment : This segment is divided into 2 units : Outdoor Unit (ODU ) : It contains the antenna . Components of VSAT Reflector Feed-Assembly LNB-F ( Optional) LNB (Front View) ( Rear View)

3. Indoor Unit (IDU) : It Contains the interface between the VSAT and the user’s equipment(PC’s , TV’s , Telephones) . SKYSTAR 360 E (Front View) (Rear View)

4. Space segment : A Geostationary earth orbital (GEO) Satellite with a directional antenna integrated which revolves around the equator at the same rotational speed as the earth .

5. VSAT Network Architecture An Earth Station acts as a hub . This ES has a very powerful antenna of 15 to 36 foot wide which employs routing capabilities and has high-speed connection to wired backbone in order to serve as a gateway to/from the VSAT network . Each end user is interconnected with the ES via satellite , forming a star tropology . The hub controls the entire operation of the network. For one user to communicate with another, each transmission has to first go to hub station and then retransmits it via the satellite to the other end user’s VSAT.

6. Computer communications ; Reservation systems ; Billing systems ; Electronic mail ; Video conferencing ; Point on sale transactions ; Credit checks and credit card verification ; Stock control and management . Applications Of VSAT

7. VSAT Advantages : High flexibility to increase the size of the network in the future. Able to integrate large number of the networks. Covers distant geographical locations. Ability to handle Voice, Video and Data . As it is mobile, can be used for short time or in emergency communication. VSAT Disadvantages : Requires clear line of sight between dish and satellite. Outages in some cases, because of the weather. These outages normally last for a few minutes.

8. THANK YOU ISKO LAGA DALA TO LIFE JINGALALA