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V - Sat Enabled Technology

OVERVIEW

VSAT technology is a telecommunication system based on wireless satellite technology. The term 'VSAT' stands for 'Very Small Aperture Terminal'. As the definition itself indicates, VSAT technology is made up of a small satellite earth station and a typical antenna of 1.8 meter diameter.

         There are three components in a VSAT network. The first is called the Master Earth Station which is the network control center for the entire VSAT network. The configuration, monitoring and management of the VSAT network are done at this location.
The Master Earth Station also has a large six-meter antenna, a fully redundant electronics, self-contained backup power system, and a regulated air conditioning system. This Master Earth Station is manned 24 x 7 days throughout the year.

       The second component is the VSAT remote earth station. This is the hardware installed at the customer's premises that includes the outdoor unit (ODU), the indoor unit (IDU) and the interfacility link (IFL). The VSAT outdoor unit consists of a standard 1.8 meter offset feed antenna, a solid state amplifier (SSPA), a Low Noise Amplifier (LNA), and a Feedhorn. The indoor unit is a VCR-sized unit that houses the communications electronics that includes interface with the customer's equipment such as computers or telephones. The IFL consists of coaxial cables that connects the outdoor unit to the indoor unit.
The third component of a VSAT network is the satellite itself. All signals sent between the VSAT earth stations are beamed through the satellite. The VSAT system uses a geostationary satellite, which is orbiting at 36,000 km above the ground

 BENEFITS OF VSAT                                                     

Our VSAT technology offers many advantages

Ease of Implementation

After the order is placed, putting up a VSAT network can be done in a matter of days depending on the number of sites. The antenna dish can be installed virtually anywhere - on rooftops, in parking lots, or on the sides of the buildings. The size of the antenna dish ranges from 1.8m to 2.4m in diameter, depending on the type of application.
Likewise, moving the VSAT unit to a new location can be done very quickly. Once the antenna site has been established, our field technicians will be able to erect the antenna in hours and usually complete the installation of the Indoor Unit on the same day.

Availability

The wireless nature of VSAT system allows its installation at virtually any location within the footprint of the satellite. Our current satellite,TELKOM-1 covers from the northern part of Australia to the mainland China. Naturally, it includes the entire archipelago of Indonesia and the neighboring ASEAN countries.
With this advantage, Customers may setup offices in a promising location without being constrained by the availability of terrestrial lines. At the same time, Customers may relocate offices to a lower cost area and still maintain the communication link with the use of our VSAT links.

Reliability

Satellite communications is extremely reliable. Our VSAT system has a Bit Error Rate (BER) of approaching 1 x 10-9. This BER is similar to that available on many of today's advanced digital terrestrial circuits. Our historical network uptime is approaching 99.98%, exceeding typical terrestrial cable lines. Our VSAT Master Earth Station has built-in redundancy that ensures continuous operations in case of failure.
Regardless of where the sites are located, each VSAT remote unit receives the same level of performance and signal quality.

Network Management

Our entire VSAT network is constantly monitored and managed by a qualified team of engineers at the Network Operations Center (NOC), located at the Master Earth Station. We are therefore able to detect problems early and provide quick resolutions before they affect the network continuity.
We remotely manage the remote VSAT equipment that is installed in each of the Customers' sites. Configuration updates or parameter changes can be downloaded from the NOC without physical visit to the Customers' sites.
This network management feature gives added assurance to our Customers that their private networks are in constant care, 24 hours, 7 days a week throughout the year.

Recovery

One of the great advantages of wireless VSAT technology is its direct connectivity between end-points. Every VSAT link is established directly through the satellite, bypassing intermediate terrestrial lines. Hence, faulty problems with the network can be identified and fixed quickly. For hardware failure at the remote earth station, we can bring up the VSAT unit by simply replacing the faulty module.
For mission critical applications, we are able to provide dial modem backup system that allows automatic cut-over to terrestrial line for temporary backup until the VSAT remote unit is fixed.

Security

Satellite networks offer excellent security against unauthorized access. All transmissions in our VSAT system are scrambled in digital format. Gaining access to a VSAT system is virtually impossible without authorization. Every remote VSAT earth station is controlled and monitored from our Network Operations Center.
Banks and financial institutions around the world predominantly use VSAT system to carry critical and sensitive financial transactions. The Canadian and U.S. Armed Forces also use VSAT for their communication networks, further testifying the security of the network.

Scalability

One of the strengths of our VSAT network is the ability to scale according to the Customer's requirements with low incremental cost. This is especially important as business grows over time. A new site can be added to the network by installing a remote VSAT unit. A VSAT network can support thousands of VSAT remotes.
Customers may start with data service. Adding more bandwidth over time can be done by a simple reconfiguration at the NOC (Network Operations Center). In addition, Customers are able to add voice capabilities or video applications at a later stage. These add-on services can be done on the existing VSAT remote unit by installing additional modules to the Indoor Unit.

Flexibility

VSAT streamlines Customers' communications into one powerful and dynamic network. Changes in the communication requirements can be adapted quickly and cost-effectively by reconfiguring the network with ease.
VSAT also gives Customers complete freedom in designing the data network whether it is based on Centralized or Distributed architecture. The VSAT network can be tailored to optimize response times to satisfy the application requirements. Unlike terrestrial networks, there are no geographic constraints in configuring VSAT multi-point links, thus minimizing network traffic peaks and transmission capacity.

Lower Cost

Our VSAT services bring about cost savings to the Customers. The advantages of the VSAT technology already give tangible and intangible benefits to our Customers. As Customers add more services, they will find that the incremental cost is very low compared to terrestrial networks.
The service costs are distance insensitive. The monthly service fees are fixed and priced according to the network capacity, not the distance between the head-office and branch locations. As a result, Customers pay only for the amount of data throughput used.

 TYPICAL VSAT APPLICATIONS                             

       Most companies develop their private wide area networks to interconnect the network of the remote offices with the main computer center. While data communications is the primary use of VSAT, there are companies that require internal telephone network for inter-office communications.

Corporate communications can be divided into the following categories:

Interactive applications

The interactive applications can be based on centralized or distributed concept. In a centralized system, all terminals in the offices operate "on-line" and communicate intermittently with the host or servers at the data center. These include client-server applications and Web-based intranet applications. In a distributed system, each remote office has terminals linked to its local host or servers. The servers then communicate with each other in a Wide Area Network (WAN). Besides real-time data applications, our VSAT network supports two-way voice capability for telephone or facsimile. Remote offices can make phone calls to each other or to the central headquarters, bypassing the local public phone network.

File Transfer

These applications send a large amount of data in one transaction. These include the use of the TCP/IP File Transfer Protocol (FTP) to transfer files and the printing of large reports.

File Broadcast

A recent file transfer application requires support of file broadcast or IP multicast. These applications send the data to multiple sites in one transaction. Typical applications include audio and video broadcast, distance learning, data distribution, and software updates. A VSAT network is inherently broadcast in nature. Thus a VSAT network naturally and efficiently support these new broadcast applications. Using a VSAT network, a large file can be distributed to hundreds of sites simultaneously. Our VSAT network supports IP multicast, which improves broadcast performance even more.

 

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