FCHorizon (Future Communication Horizon) provides best of breed VSAT
technology by implementing VSAT networks over SCPC satellite links to
handle voice, fax and data communications. A customer's network can
be configured as a STAR or MESH network. The network supports data applications
as well as voice with compression. The data network handles a wide range
of protocols from user devices including legacy SNA/SDLC, Async, 3270
Bisync, HDLC and X.25; Frame Relay; LAN traffic, both Ethernet and Token
Ring; or analog and digital voice, fax and video data. Speeds supported
are 64 Kbps up to 2Mbps.
What is VSAT?
VSAT stands for Very Small Aperture Terminal
and refers to combined send/receive terminals with a typical antenna
diameter of 1 to 3.7m. VSAT networks are well suited for business applications,
offering solutions for large networks with low or medium traffic. They
provide very efficient Point-to-point and point-to-multipoint communications,
are easy to install, and can be expanded at very low extra cost. Any
business operation with long-distance telecommunications needs will
find VSAT an attractive solution.
With VSAT networks, there is no dialling, no response delays, no interruptions.
They offer immediate accessibility and continuous high-quality transmissions.
And as they are adapted for any kind of transmission, from data to voice,
fax, and video, VSAT networks offer the operational flexibility needed
for all information transfers, with very simple installation.
VSAT terminal equipments
VSAT Terminal Equipment consists of two units - an indoor unit and
an outdoor unit.
The outdoor unit is placed outdoors for a line-of-sight to the satellite
and the indoor unit interfaces with the user's communications device
(e.g. data terminal equipment). The outdoor unit consists of a small
antenna, mount and electronics for signal reception and transmission.
The indoor unit consists of a satellite modem and demodulator(s) and
a network access device to interface with data LANs and PBXs.
VSAT: Potential Advantages
Wide area coverage across borders
Within the satellite coverage area, satellite communication offers
Rapid deployment of new sites
Within an existing network new site can be commissioned rapidly with
relatively little efforts.
Independent of terrestrial infrastructures
The global de-regulation of satellite communications services is becoming
a fact. This will eventually allow for the implementation of more
private, and independent of any terrestrial infrastructures, networks
No local loop issues
VSAT systems are installed directly at the customer sites. Terrestrial
back haul lines, in many instances therefore, are not required. Consequently,
operators do have less concern about back haul costs, inflexibility
when increasing bandwidth, terrestrial availability etc.
High degree of reliability
Satellite communication provides an availability of nominally 99.5%
at a BER of 10-7 or better. This is unreachable by terrestrial lines
due to the higher number of point failures.
Distance independent costs
The space segment costs do not depend on the distance within the satellite
coverage area. Therefore the costs for a VSAT network and data transmission
are independent of distances and country specific PTT fees.
Changes in network configuration such as bandwidth, interfaces, data
rates etc, can be easily performed. Very often they can even be made
remotely from the central management system.