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WELCOME TOTECHNICAL SEMINAR

PRESENTED BY:KUMAR ANAND SINGH

ADMISSION NO.:04-244,ETC/2008

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WHAT IS VSAT ?VSAT is a device ( known as earth station )that is used

to receive satellite transmission.

It has two basic components

1.OUTDOOR UNIT

2.INDOOR UNIT

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ODU & IDUOUT DOOR UNIT

ANTENNA

RADIO FREQUENCYTERMINAL

LOW NOISE AMPLIFIER

SOLID STATE POWERAMPLIFIER

LOW NOISE BREAKER

INDOOR UNIT

It is the brain of theVSAT.

It contains the interfacebetween the vsat & thecustomers equipment.

This equipment caneither be a PC, aTELEPHONE,TV, oralmost any otherequipment.

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DIFFERENT VSATS

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VSAT NETWORKA vsat network has the following components:

A CENTRAL HUB

A SATELLITE

UNLIMITED REMOTE VSATS

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HUB STATION The hub station is a relatively large, high

performance earth station with an antennadiameter of anything between 6 to 9 meters.

The hub consists of a control center ,whichmanages the n/w as well as microwaveequipment, including the outdoor antennafor the transmission and reception ofsignals.

Outbound data from the hub is transmittedat relatively high data rates (56 to 1024kb/s).

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SATELLITE The satellite is a geostationary satellite. It is

essentially a repeater or mirror ,that reflectstransmissions from the terminal back to earth .Thisenables one terminal of the network to communicatewith another terminal hundreds of miles away .Furthermore, i t a lso enables broadcast ing

information from one terminal to many others ,as thetransmission of the signal from the satellite back toearth normally covers a large geographical area.

Two types of satellites are there:

KU-BAND SATELLITE

C-BAND SATELLITE

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GEOSTATIONARYSATELLITE

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VSAT NETWORK

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TOPOLOGY

VSAT network can be arranged in following ways:

STAR TOPOLOGY

MESH TOPOLOGY

HYBRID TOPOLOGY

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STAR TOPOLOGY The earth hub station

acts as the central node& employs a large sizetransceiver.

Each remote user issupported by a VSAT.

The satellite provides abroadcast medium

acting as a commonconnection point for allthe remote VSAT earthstation

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HUB NETWORK

THERE ARE TWO TYPES OF HUB NETWORK:

SHARED HUB NETWORK

MINI HUB NETWORK

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SHAREDHUB NETWORK To make the VSAT network more affordable the hub

is shared between several users ,thereby spreadingthe cost.

The hub is usually owned by a service provider who

retains overall control over the network.

Each user is allocated his own time slots or carriers& can operate his own private n/w using shared hubfacility without any loss of privacy.

The operation and management of these sub networkis performed by the users themselves.

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VSAT SHARED HUBNETWORK

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MINI HUB NETWORK

Each user has his own mini hub smaller&simpler, and hence cheaper than aconventional hub.

Each user organization has completecontrol over his own communication.

Overall management of the complete n/w is

provided by the service supplier who has asuper hub which provides n/w supervision&diagnostic support.

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MINI HUB NETWORKCONFIGURATION

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ADVANTAGES OF VSATTECHNOLOGY

COST EFFECTIVE

FLEXIBILITY

ACCESSIBILITY

RELIABILITY

VERSATILITY TRANSMISSION QUALITY

HIGH N/W PERFORMANCE

FAST TRANSMISSION

CONTROL

ABILITY TO HANDLE LARGE AMOUNTS OF DATA SINGLE VENDOR SOLUTION FOR BOTH EQUIPMENT &

BANDWIDTH.

ABILITY TO HANDLE VOICE,VIDEO &DATA

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APPLICATION CREDIT CARD VERIFICATION

CENTRALISED STOCK CONTROL

CENTRALISED TICKET RESERVATION SYSTEM

STOCK EXCHANGE PRICE BROAD CASTING

DATABASE DISTRIBUTION AND UPDATES(INVALID CREDITCARDS,TRANSMISION OF REMOTE PRINTING PRESS DATA)

TELEX SYSTEM

VEDIO CONFERENCING

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END OF SEMINAR

THANK YOU