Introduction Definition: Communications Satellite is a satellite stationed in geosynchronous orbit that acts as a microwave relay station, receiving signals sent from a ground-based station (earth station), amplifying them, and retransmitting them on a different frequency to another ground-based station. Initially used for telephone and television signals, communications satellites can also be used for high-speed transmission of various multimedia services such as data communications, video and graphic image transfer and interactive conferencing. Overview Many satellites now orbit the earth, bringing satellite communications to almost all parts of the globe. To use a satellite all you need is terminal hardware at your station and the leasing of bandwidth. You will need a big receiving dish, if the signal in your area is weak. Forms of satellite networks 1.
Information broadcast- This is used for one-way communication. Data can be transmitted simultaneously in real time (as it happens) to a number of sites e. g. a head office in Paris can broadcast monthly sales for figures or news of the new policies to offices across the world. 2.
Point-to-point- Allows two way communications between satellite terminals and is ideal for isolated parts of the world. On this network you can have various multimedia services such as data transfer and video conferencing. 3. A hub or star network-Provides two-way communication over shared band width between large numbers of sites. All the information is processed by a central hub e. g.
The Term Paper on Cellular Radio Isdn Networks And Satellite Communications
... networks for these services. 3. What is Satellite Communications? This is the use of orbiting satellites to relay microwave transmissions from earth stations to the satellite ... channel. The B channel carries data, voice and other services. The D channel carries control and signal information. Narrow band ISDN transmits ...
a head office, before being transmitted via satellite to remote sites. 4. Mesh network- enables several terminals to communicate directly without the need for a hub. It is typically used for voice applications. Two factors affecting the use of satellites with computers, however, are propagation delay (the time lag caused by the distance traveled by the signal) and security concerns.
Wireless satellite communications solutions Wireless Connectivity Solutions offer residences and businesses a reliable, real time voice and data connection at competitive rates. Customers can take advantage of microwave technology features such as mobility, low fixed-cost services, fast and easy development with the quality and reliability of their counterpart – wired lines. Whether you are involved in mining, construction projects or scheduled to work at sites where LANs are impossible to implement, wireless voice and Ethernet solutions can enable you to communicate and co-ordinate activities more effectively. satellite communication systems offers point-to-point or point-to-multipoint access at bandwidths from 2 GHz to 11 GHz relative to your business demands further deployment of your wireless network can follow your business growth.
The coverage area of your satellite communication systems Satellite Earth Station can be extended with high performance wireless LAN and access products that use frequency hopping, spread spectrum radio technology and operate in the license-free 2. 4 GHz ISM (Industrial, Scientific and Medical) band. Satellite communication systems can offer fully integrated wireless solutions, including, High-speed Wireless Internet Access, Wireless LAN, Wireless WAN and IP Broadband Wireless Local Loops. This same internetworking technology also allows seamless connectivity between Satellite Hubs to provide Virtual Private LANs, International Foreign Exchange Services and support for International Call Centers..
The Essay on Lucent Technologies Communications Systems Business
At&T, Ncr, And Lucent Technologies Essay, Research At&T, Ncr, And Lucent Technologies In 1996, AT&T decided to split into three different companies. These new companies were the new AT&T, NCR, and Lucent Technologies. Lucent Technologies is one of the leading designers, developers, and manufacturers of telecommunications systems, software, and products. 1 They are beginning to ...
