1. What is a satellite
A satellite is a mechanism, being sent into space, for activating such communicational means, as TV, radio, telephone, etc. The satellites transmit the signals being transmitted from any one region to the desired regions within various frequency bands, by conveying them through the electronic circuit.
2. How long is the life of a satellite?
The life of a satellite is approximately 12-15 years. When the fuel of the rockets stabilizing a satellite is finished, then ends the life of the said satellite.
3. What is the ping period in the satellite communication
Packed transmission period (Ping period) indicates the time of arrival of a signal from the transmitter station to the satellite receiver station. This period is 240 ms long. This period arises from positioning of the satellite above equator (36,000 km).
4. What is VSAT?
VSAT (Very Small Aperture Terminal) is a technology, being utilized for establishing communication networks, by making use of a satellite dish of 120 cm radius, and the necessary electronic devices. VSAT devices provide one-, or two-way audio-visual, and data communication by or between the center via a main hub, by making use of the transponders at the communication satellites.
5. How to operate VSAT?
Internet access of all the users at the VSAT network is provided via a central satellite earth Station at the Network Operation Center (NOC). VSAT users acquire their internet access via the network devices at the infrastructure of central satellite earth station, after reaching to central satellite earth station via satellite.
6. What is SCPC?
SCPC (Single Channel Per Carrier) is the allocation of a conveyor, in other words a frequency range at the satellite as per each link necessary for communication. Thus, any type of fast, secure, and scalable link requirement can be met.
7. How to operate SCPC?
At the SCPC systems, the units communicate with each other directly via satellite, without requiring a central satellite earth station likewise at VSAT systems.
8. What are the differences between SCPC and VSAT systems?
Not necessitating communication via a central earth station likewise at VSAT systems, response times at SCPC systems are shorter than those of VSAT systems accordingly. Consequentially, these are more costly systems of higher-performance. In addition, there is no shared protocol is in question at SCPC systems, while a capacity is specified dedicated to each user individually. Therefore, access speed is fixed.
9. What is the two-way connection available at VSAT and SCPC systems?
The two-way connection being operated both at VSAT, and SCPC systems is a connection type usable for both uploading, and downloading.
10. What are the symmetric and asymmetric connection being operated at VSAT and SCPC systems?
Symmetric connection is the connection type, in which uploading and downloading speeds are equal to each other.
Asymmetric connection is the connection type, in which uploading and downloading speeds are different from each other. At the asymmetric connections, upload speed is slower than download speed.
11. What is meant by the shared protocol being in question at VSAT systems?
Shared protocol is that a single frequency band or period is being shared by all of the systems. There is no satellite receiver/transmitter, or frequency band, specially allocated to the system is in question.
12. Which applications are being operated via VSAT and SCPC systems?
Data transfer (FTP), VPN, VoIP, Video conference, Telemedicine, real-time multimedia (news, stock-exchange, business, finance, publishing), POS applications, institutional resource planning (ERP and CRM) applications.
13. What is VPN?
Virtual Private Network is a technology, designed for providing encoded and secure data communication via internet. This is a “tunnel” type application, providing a secure access to the corporate network from a distant point. It is simply designed with an operating logic, intended to have two points on different lines, such as satellite connections, cable net structures, leased-lines, operated at the same network.
14. How many types of VPN application are there? What are these?
There are two types of VPN application, namely ‘Remote Access’ and ‘Site to Site’.
Remote Access VPN is designed to provide the mobile employees of a company a secure access from everywhere to their corporate network. Or this is used for connecting the branches of a major company at different locations to the center.
Site to Site VPN is intended for secure inter-corporate communication via VPN. Meanwhile, it is also used for providing a connection between the branches of a single corporation at different locations. The only difference from Remote Access VPN is that, there are VPN servers at the both two ends of the VPN operation.
15. What is BOD, designed for the back-up service of TeknoSAT?
“Bandwidth on Demand” (BoD) is to put one link or, more than one links into operation independently at anytime, and on any bandwidth.
16. What does FAP (Fair Access Policy), being mentioned at most of the satellite systems, mean?
FAP (Fair Access Policy) is lowering down of the internet speeds of VSAT customers, after they have downloaded a certain file size. There is no total breakdown, or extra pricing of internet connection is in question with respect to this feature.
17. What is GPS?
GPS (Global Positioning System) is a satellite network, transmitting regularly encoded information, besides enabling to identify the definite location on earth, by measuring the distance between the satellites.
