- Why Satellites
It is a well known fact that satellites provide a very effective means of transmitting and receiving almost any kind of data: voice, files, and IP-based applications. As a result, Satellite communications have become today's natural high-speed transport medium for a wide range of IP and multi-media applications.
Satellite links also have the enhanced capability of being activated faster than terrestrial fiber links while providing maximum endurance and optimum capacity. An antenna, a modem and a satellite circuit requires a shorter set up time as opposed to the months often needed for fiber installations. For Internet Services, the performance is enhanced due to direct links to Internet backbones, bypassing congested terrestrial lines and numerous router hops.
Dedicated space segments, local loop circuits and ports integrated into major Internet backbones means ISPs do not share infrastructure, which is another cause behind the slow or degraded connection over fiber. This culminates in a pricing structure that is distance insensitive, keeping running costs down for international corporations and ISPs.
- What are the types of Satellites?
There are primarily two different types of Satellites:
- Low Earth Orbit (LEO) LEO satellites are located around 1000 km altitude and they orbit the earth in less than 24-hrs.In addition, satellites in low earth orbit change their position relative to the ground position quickly. So even for local applications, a large number of satellites are needed if the mission requires uninterrupted connectivity. To provide continuous communications service, there must be a number of satellites in coordination - this is called a constellation.
- Geostationary Earth Orbit (GEO) A satellite in a geostationary orbit appears to be in a fixed position to an earth-based observer. A geostationary satellite revolves around the earth at a constant speed once per day over the equator. GEO satellites are the proven means of consistent and reliable communications. The geostationary orbit is useful for communications applications because ground based antennas, which must be directed toward the satellite, can operate effectively without the need for expensive equipment to track the satellite's motion.
- Where to use Satellites?
Satellite solution depends on the communication requirement. Following are some typical satellite applications:
- Providing Internet services to a remote location.
- To transfer Voice traffic from Country A to Country B.
- Connecting different offices around the world.
- Transmitting a TV channel to be viewed by a large audience in different countries
- Live Events like News, Sports can be watched simultaneously by a large audience
- What is a teleport and what sort of traffic do teleports control?
Teleports are permanent satellite uplink facilities located in different parts of the world. These teleports are facilities that are built for the purpose of maintaining high quality communications links with orbiting satellites. Teleports manage data transportation services, including video and voice traffic. This allows teleport operators to provide satellite communications solutions such as broadband internet via satellite, corporate networks, point-to-point and point-to-multipoint connections, IP Trunking, VOiP and GSM Backhaul and TV Broadcasting services.
- What is a NOC?
A Network Operations Center (NOC) is the physical location from where a typically large telecommunications network is managed, monitored and supervised.
The NOC is the central point for troubleshooting of network failures, software distribution and updating, router and domain name management, performance monitoring and coordination with affiliated networks.
- DVB-S2 and DVB-S2X modulation
The latest innovation in satellite transmission technology, DVB-S2 is 30% more powerful (DVB-S2X extension even more) and efficient than former DVB-S, supports a much wider range of applications and is quick and easy to install. It is used for access to internet services as well as for point-to-point and multipoint applications. Data is transmitted via a DVB-S2 or DVB-S2X modulator and is received on a DVB-S2 Demodulator/Receiver and vice versa. DVB-S2 and DVB-S2X also can be configured as a simplex or a duplex dedicated link.
- Why satellite backhaul?
Backhaul solutions via satellite can be used to extend cellular coverage as an alternative or backup to terrestrial links.
Satellite backhaul services can be used for 2G, 3G, 4G, LTE and WiMax networks, thus for mobile voice communication, broadband internet access and entertainment on the move to get easily content. Backhaul services can also be used for marine applications (such as internet, telephony and TV for ships), mining extraction and oil drilling platforms, for institutions such as bank branches with ATM banking, e-learning and e-education.
- With the growing use of Satcomms and backhaul, how are Teleports managing to support clients?
The growing demand in bandwidth arise from services such as mobile applications, VoIP and GSM Backhaul to extend cellular coverage as an alternative or backup to terrestrial links, broadcasting – contribution and distribution of programs, and Internet Broadband Services for networks and large satellite links.
Teleports are capable of covering the growth in use of Satcomms and backhaul, by using effective satellites with strong coverage, top-of-the-line equipment using latest technology with best possible modulation such as DVB-S2 or extended DVB-S2X, ACM option (Adaptive Coding and Modulation) and carrier-in-carrier solutions.
- Why Direct-to-home TV via satellite?
Direct-to-home television (DTHTV) is a method of receiving satellite television by means of signals transmitted from direct-broadcast satellites. All the major services use direct-broadcast satellites. Signals are transmitted mostly using Ku band and are completely digital which means they have high picture and stereo sound quality.
- What is a free-to–air platform?
A free-to-air platform consists of a large number of free TV channels which are not encrypted and can be watched by all direct-to-home subscribers who can receive the satellite signal.