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MacroSat's low
cost business terminals with small antennas (generally less
than 2 meters in diameter) are often termed Very Small
Aperture Terminals (VSATs). These are usually perceived as
being two-way data terminals, though strictly speaking many
of the systems used for data broadcast are really one-way
VSATs. Taking the USA as an example, approximately half of
all installed VSATs are only used for one-way data links.
ETSI take a different
definition for a VSAT as a one or two-way terminal used in a
star, mesh or point to point network. Antenna size is
restricted to being less than or equal to 3.8 m at Ku band
and 7.8 m at C band.
A more general definition is
that a network is a VSAT network if it consists of a large
high performance hub earth station (with an antenna of up to
9 m in diameter) and a large number of smaller, lower
performance terminals. Being completely general, these small
terminals can be receive only, transmit only or
transmit/receive. Even this definition is not universal.
Meshed VSAT networks exist in which all terminals have the
same size and performance.
As terminal technology
advances, the size of the antenna required to achieve a
particular link quality (bit error rate) decreases. A class
of terminals smaller than VSATs is now available; these are
termed Ultra Small Aperture Terminals (USATs). For most
practical purposes, USATs are just VSATs with smaller
antennas. It must always be remembered, however, that as
antenna size decreases, the antenna beam widens and that a
point is rapidly reached when there is no further advantage
in decreasing antenna size because of increased interference
with other systems. The practical current lower limit on
antenna size is 55 cm diameter.
Typical applications for
interactive VSAT networks are:
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computer
communications;
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reservation systems;
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database enquiries;
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billing systems;
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file transfers;
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electronic mail;
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video conferencing;
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point of sale
transactions;
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credit checks and
credit card verification;
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stock control and
management.
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MacroSat is your complete and reliable
source
for all your communication systems and equipment needs, VSAT
satellite internet solutions, and business web pages solutions, in
Europe, Africa and the Middle East. It is our intent to
educate and inform the consumer about the many technologies that can
be used to make your home, office, or organization more productive,
profitable,and easier to manage.
Take a moment to browse through the many available sections of our
homepage and learn how we can make technology work for you. Our staff of
professionals is always available to help answer any questions you
may have. With expert planning, installation, upgrades, repairs,
technical support and superior customer service, MacroSat give you
the ultimate solution.
For years, MacroSat has been providing businesses like yours with
innovative, leading edge concepts in communication. From
state-of-the-art digital VSAT satellite internet links and fiber
optic networks, our engineering staff can plan and install a system
custom-fit just for you.
Remote Office Connectivity
Securely connect remote sales, banking, brokerage and other branch
and district offices to headquarters. Provide high speed web and
private network access for multi-national offices, suppliers and
customer sites.
Cyber Café, Hot Spot and ISP Backhaul Service
Scaleable high speed backhaul to the internet. Increase satellite
bandwidth on the fly as you add subscribers, rather than subsidizing
expensive T-1 links until you hit critical mass.
Milsatcom, Homeland Security and Border Patrol
Fixed and transportable broadband satellite solutions provide IP
connectivity for a variety of requirements including news feeds,
VoIP, video surveillance and secure connectivity to military and
government central command locations.
Hotel and Multi-Tenant Dwellings
High-speed broadband internet access for clients, tenants and
residential customers.
Healthcare
Link remote clinics and healthcare facilities, providing
telemedicine, insurance processing, patient record management, asset
control.
Insurance
Process claims and provide voice connectivity to headquarters for
applications such as hail damage at auto dealerships, tornado, flood
and other weather related disasters. |