Telecommunication News & Update

Telecommunication:
As Defined in Wikipedia, the free encyclopedia

Telecommunication is the transmission of signals over a distance for the purpose of communication. In modern times, this process typically involves the sending of electromagnetic waves by electronic transmitters, but in earlier times telecommunication may have involved the use of smoke signals, drums or semaphore. Today, telecommunication is widespread and devices that assist the process, such as the television, radio and telephone, are common in many parts of the world. There are also many networks that connect these devices, including computer networks, public telephone networks, radio networks and television networks. Computer communication across the Internet is one of many examples of telecommunication.

Modern Operation:

Telephone:
In a conventional telephone system, the caller is connected to the person he wants to talk to by switches at various telephone exchanges. The switches form an electrical connection between the two users and the setting of these switches is determined electronically when the caller dials the number. Once the connection is made, the caller's voice is transformed to an electrical signal using a small microphone in the caller's handset. This electrical signal is then sent through the network to the user at the other end where it transformed back into sound by a small speaker in that person's handset. There is a separate electrical connection that works in reverse, allowing the users to converse.

Radio and Television:
In a broadcast system, a central high-powered broadcast tower transmits a high-frequency electromagnetic wave to numerous low-powered receivers. The high-frequency wave sent by the tower is modulated with a signal containing visual or audio information. The antenna of the receiver is then tuned so as to pick up the high-frequency wave and a demodulator is used to retrieve the signal containing the visual or audio information. The broadcast signal can be either analogue (signal is varied continuously with respect to the information) or digital (information is encoded as a set of discrete values).

The Internet:
The Internet is a worldwide network of computers and computer networks that can communicate with each other using the Internet Protocol.Any computer on the Internet has a unique IP address that can be used by other computers to route information to it. Hence, any computer on the Internet can send a message to any other computer using its IP address. These messages carry with them the originating computer's IP address allowing for two-way communication. In this way, the Internet can be seen as an exchange of messages between computers.

Local Area Networks:
Despite the growth of the Internet, the characteristics of local area networks (computer networks that run at most a few kilometres) remain distinct. This is because networks on this scale do not require all the features associated with larger networks and are often more cost-effective and efficient without them.

Satellite Communication:
A communications satellite (sometimes abbreviated to comsat) is an artificial satellite stationed in space for the purposes of telecommunications. Modern communications satellites use geostationary orbits, Molniya orbits or low polar Earth orbits. For fixed services, communications satellites provide a technology complementary to that of fiber optic submarine communication cables. They are also used for mobile applications such as communications to ships and planes, for which application of other technologies, such as cable, are impractical or impossible.

The above article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Telecommunication" and Wikipedia article "Communications Satellite"

Industry Watch: Telecommunication News
Welcome to XTVWorld.Com's Industry Watch Section's Telecommunication News Pages..

Here you will get updated news headlines and news briefs from the world wide telecommunication industry. What's more - here you will also get to catch up with the latest video clips available on the same issue.

The topics covered in Industry Watch have been hand picked by our editors keeping XTVWorld.Com's technology savvy visitors in mind - and we hope you will find the topical news pages an useful tool for gathering regular information in the field of your industry.

The topic we have covered under "Telecommunication" are:

• Cable
• CDMA
• eMail
• GPS
• GSM
• Instant Messaging
• Microwave
• Mobile Phone
• Satellite
• Smart Phone
• Two Way Radio
• Video Conferencing
• VOIP
• WAP
• Wifi Phone