VSAT

1. PRESENTATION ON
VSAT [ VERY SMALL APERTURE
TERMINAL ]
Friday, September 4, 2015

2. VSATVSAT
 VSAT or Very Small ApertureVSAT or Very Small Aperture
Terminals are small, software-drivenTerminals are small, software-driven
earth stations.earth stations.
 It is used for the reliableIt is used for the reliable
transmission of data, video, or voicetransmission of data, video, or voice
via satellite.via satellite.
 It requires no staff or additionalIt requires no staff or additional
technology to operate it.technology to operate it.
 It simply plugs into existing terminalIt simply plugs into existing terminal
equipment.equipment.
Friday, September 4, 2015

3. Short for “Small Aperture Terminal, an earthboundShort for “Small Aperture Terminal, an earthbound
station used in satellite communications of data, voicestation used in satellite communications of data, voice
and video signals, excluding broadcast television.and video signals, excluding broadcast television.
A VSAT should consists of two partsA VSAT should consists of two parts -- >-- >
VSAT
Transceiver
Device such as
Personal Computer
(PC)
Friday, September 4, 2015

4.  A VSAT consists of two parts, a transceiverA VSAT consists of two parts, a transceiver
that is placed outdoors in direct line ofthat is placed outdoors in direct line of
sight to the satellite and a device that issight to the satellite and a device that is
placed indoors to interface the transceiverplaced indoors to interface the transceiver
with the end user's communicationswith the end user's communications
device, such as a PC .device, such as a PC .
 The transceiver receives or sends a signalThe transceiver receives or sends a signal
to a satellite transponder in the sky.to a satellite transponder in the sky.
 The satellite sends and receives signalsThe satellite sends and receives signals
from a ground station computer that actsfrom a ground station computer that acts
as a hub for the system.as a hub for the system.
Friday, September 4, 2015

5. Working of HUB stationWorking of HUB station
 Each end user is interconnected with the hubEach end user is interconnected with the hub
station via the satellite, forming a star topology.station via the satellite, forming a star topology.
 The hub controls the entire operation of theThe hub controls the entire operation of the
network .network .
 For one end user to communicate with another,For one end user to communicate with another,
each transmission has to first go to the hub stationeach transmission has to first go to the hub station
that then retransmits it via the satellite to the otherthat then retransmits it via the satellite to the other
end user's VSAT.end user's VSAT.
 VSAT can handle up to 56 Kbps.VSAT can handle up to 56 Kbps.
Friday, September 4, 2015

6. Usage of VSATUsage of VSAT
• The first commercial VSAT were C band (6 GHz)
receive-only systems by Equatorial
Communications.
• VSAT are used by car dealerships affiliated with
manufacturers such as Ford and General Motors
• They are used for transmitting and receiving sales
figures and orders, as well as for receiving internal
communications, service bulletins, and interactive
distance learning courses from manufacturers. The
Ford Star network, used by Ford and its local
dealers, is an example of this.
Friday, September 4, 2015

7. Usage of VSATUsage of VSAT
• VSAT technology is also used for 2-way satellite
internet providers such as HughesNet and
StarBand in the US.
• Nearly all VSAT systems are now based on IP, with
a very broad spectrum of applications.
• As of December 2004, the total number of VSATs
ordered stood at over 1 million, with nearly
650,000 in service. Annual VSAT service revenues
were $3.88 billion.
Friday, September 4, 2015

8. Configurations of VSATConfigurations of VSAT
• AA star topologystar topology, using a central uplink site, such as a, using a central uplink site, such as a
network operations center (NOC), to transport datanetwork operations center (NOC), to transport data
back and forth to each VSAT terminal via satellite.back and forth to each VSAT terminal via satellite.
• AA mesh topologymesh topology, where each VSAT terminal relays, where each VSAT terminal relays
data via satellite to another terminal by acting as adata via satellite to another terminal by acting as a
hub, minimizing the need for a centralized uplink site.hub, minimizing the need for a centralized uplink site.
• A combination of bothA combination of both star and meshstar and mesh topologies.topologies.
These configurations areThese configurations are
utilized to minimize the overall cost of the network,utilized to minimize the overall cost of the network,
and to alleviate the amount of data that has to beand to alleviate the amount of data that has to be
relayed through a central uplink site (or sites) of a starrelayed through a central uplink site (or sites) of a star
or multi-star network.or multi-star network.
Friday, September 4, 2015

9. VSAT customersVSAT customers
 Supermarket Shops.Supermarket Shops.
 Chemist Shops.Chemist Shops.
 Garages / vehicle sales / petrol stations / motor spares.Garages / vehicle sales / petrol stations / motor spares.
 Hotel chains.Hotel chains.
 Insurance offices.Insurance offices.
 Car rental offices.Car rental offices.
 Airlines, travel agents.Airlines, travel agents.
 Financial institutions - ATM machines.Financial institutions - ATM machines.
 Manufacturers - sales offices, service divisions, plants.Manufacturers - sales offices, service divisions, plants.
 Job centers.Job centers.
 Customs and tax offices / border passport controlCustoms and tax offices / border passport control
checkpoints.checkpoints.
 Data file and software distributors.Data file and software distributors.
 Pipeline monitoring, oil rigs.Pipeline monitoring, oil rigs.
 Rural telephony, data, videophone.Rural telephony, data, videophone.
 Schools.Schools.
 Environmental monitoring.Environmental monitoring. Friday, September 4, 2015

10. Spotlight VSAT Application: SiriCOMM
Friday, September 4, 2015

11. About SiriCOMMAbout SiriCOMM
 The primary mission of SiriCOMM Inc. is toThe primary mission of SiriCOMM Inc. is to
develop software to help the trucking industrydevelop software to help the trucking industry
become more productive, use assets better, andbecome more productive, use assets better, and
reduce operating costs. The company has over 40reduce operating costs. The company has over 40
years experience in developing trucking industryyears experience in developing trucking industry
applications, but also realized that its softwareapplications, but also realized that its software
couldn’t reach its full potential without acouldn’t reach its full potential without a
substantially improved means of communicationsubstantially improved means of communication
between truck drivers and trucking companies.between truck drivers and trucking companies.
Friday, September 4, 2015

12. Characteristics of VSAT systemsCharacteristics of VSAT systems
 Reliable CommunicationsReliable Communications
VSAT satellite communications provide virtuallyVSAT satellite communications provide virtually
error-free digital data communications and better thanerror-free digital data communications and better than
99.9% network reliability.99.9% network reliability.
 Remote CommunicationsRemote Communications
No matter how remote or dispersed yourNo matter how remote or dispersed your
operations are, VSAT provide a link to your headquarters.operations are, VSAT provide a link to your headquarters.
VSAT can provide remote diagnostics, remoteVSAT can provide remote diagnostics, remote
monitoring, and data streaming services from remote ormonitoring, and data streaming services from remote or
hazardous sites.hazardous sites.
Friday, September 4, 2015

13.  TimeTime
VSAT deployment takes no more than 4-6 weeks asVSAT deployment takes no more than 4-6 weeks as
compared to 4 to 6 months for leased linescompared to 4 to 6 months for leased lines..
 Network ManagementNetwork Management
Network monitoring and control of the entireNetwork monitoring and control of the entire
VSAT network is much simpler than a network of leasedVSAT network is much simpler than a network of leased
lines, involving multiple carriers at multiple locations. Alines, involving multiple carriers at multiple locations. A
much smaller number of elements needs to be monitoredmuch smaller number of elements needs to be monitored
incase of a VSAT network and also the number ofincase of a VSAT network and also the number of
vendors and carriers involved in between any two uservendors and carriers involved in between any two user
terminals in a VSAT network is typically one.terminals in a VSAT network is typically one.
 MaintenanceMaintenance
A single point contact for operation, maintenance,A single point contact for operation, maintenance,
rapid fault isolation and trouble shooting makes thingsrapid fault isolation and trouble shooting makes things
very simple for a client, using VSAT servicesvery simple for a client, using VSAT services

14.  FlexibilityFlexibility
VSAT networks offer enormous expansionVSAT networks offer enormous expansion
capabilities. VSAT can be rapidly installed to support thecapabilities. VSAT can be rapidly installed to support the
network expansion to any site, no matter however remote.network expansion to any site, no matter however remote.
 CostCost
A comparison of costs between a VSATA comparison of costs between a VSAT
network and a leased line network reveals that a VSATnetwork and a leased line network reveals that a VSAT
network offers significant savings over a two to threenetwork offers significant savings over a two to three
years timeframe.years timeframe.
Friday, September 4, 2015

15. System IntegrationSystem Integration
 IP Based Wan Network ServicesIP Based Wan Network Services
 E-Mail ServiceE-Mail Service
 Mobile VSAT Communications SystemMobile VSAT Communications System
 Data and Voice ConnectivityData and Voice Connectivity
 FaxFax
 VideoVideo
 Installation, Moving And Set-up ServicesInstallation, Moving And Set-up Services
 Broadcast ServicesBroadcast Services
 Contract Installation and Service on VSAT NetworksContract Installation and Service on VSAT Networks
 Real-Time Data Acquisition and BroadcastReal-Time Data Acquisition and Broadcast
 7/24 Hour Service and Support7/24 Hour Service and Support
 CDMS (Code Division Multiple Access) TechnologyCDMS (Code Division Multiple Access) Technology
 SCPC (Single Carrier Per Channel) TechnologySCPC (Single Carrier Per Channel) Technology
 TDMA (Time-Division Multiple Access) TechnologyTDMA (Time-Division Multiple Access) Technology
 Multiple Network ConfigurationsMultiple Network Configurations
Friday, September 4, 2015

16. VSAT Site InstallationVSAT Site Installation
 The antenna needs to be mounted where it can 'see' theThe antenna needs to be mounted where it can 'see' the
satellite and where it is safe from unauthorised access.satellite and where it is safe from unauthorised access.
 Ground MountGround Mount
This involves a tube lowered into a holeThis involves a tube lowered into a hole
which is then filled in with concrete.which is then filled in with concrete. The pole shouldThe pole should
be accurately vertical so that when you swing the dishbe accurately vertical so that when you swing the dish
around to find the satellite the elevation angle staysaround to find the satellite the elevation angle stays
the same all the time.the same all the time.
 The indoor data processing unit (DPU)The indoor data processing unit (DPU)
The indoor data processing unit (DPU)The indoor data processing unit (DPU)
should be located in a dry, cool and clean place.should be located in a dry, cool and clean place.
Friday, September 4, 2015

17.  SafetySafety
Installing a dish is normally dangerous. TakeInstalling a dish is normally dangerous. Take
care not to fall down and not to drop tools on otherscare not to fall down and not to drop tools on others
below. Be careful with ladders - always tie off the topbelow. Be careful with ladders - always tie off the top
to some secure point. A small electric shock mayto some secure point. A small electric shock may
make you fall off a ladder so be extra careful.make you fall off a ladder so be extra careful.
TIPSTIPS : ----: ---- If you are a beginner, practice the completeIf you are a beginner, practice the complete
installation at ground level before moving everything to the roof.installation at ground level before moving everything to the roof.
 AccuracyAccuracy
The dish pointing needs to be near perfect asThe dish pointing needs to be near perfect as
the transmit beam is narrower then the receive beam.the transmit beam is narrower then the receive beam.
Friday, September 4, 2015

18. Thanks