Definition

telecommunications (telecom)

Contributor(s): Irwin Lazar

Telecommunications, also known as telecom, is the exchange of information over significant distances by electronic means and refers to all types of voice, data and video transmission. This is a broad term that includes a wide range of information transmitting technologies such as telephones (wired and wireless), microwave communications, fiber optics, satellites, radio and television broadcasting, the internet and telegraphs.

A complete, single telecommunications circuit consists of two stations, each equipped with a transmitter and a receiver. The transmitter and receiver at any station may be combined into a single device called a transceiver. The medium of signal transmission can be via electrical wire or cable (also known as "copper"), optical fiber, electromagnetic fields or light. The free space transmission and reception of data by means of electromagnetic fields is called wireless communications.

Types of telecommunications networks

The simplest form of telecommunications takes place between two stations, but it is common for multiple transmitting and receiving stations to exchange data among themselves. Such an arrangement is called a telecommunications network. The internet is the largest example of a telecommunications network. On a smaller scale, examples include:

Data is transmitted in a telecommunications circuit by means of an electrical signal called the carrier or the carrier wave. In order for a carrier to convey information, some form of modulation is required. The mode of modulation can be broadly categorized as either analog or digital.

In analog modulation, some aspect of the carrier is varied in a continuous fashion. The oldest form of analog modulation is amplitude modulation (AM), which is still used in radio broadcasting at some frequencies. Digital modulation actually predates analog modulation; the earliest form was Morse code. Modern telecommunications use IPs (internet protocols) to carry data across underlying physical transmissions.

Telecommunications service providers

Telecommunications systems are generally run by telecommunications service providers, also known as communications service providers. These providers historically offered telephone and related services and now offer a variety of internet and WAN services, as well as metropolitan area network and global services.

In many countries, telecom service providers were primarily government owned and operated, but that is no longer the case, and many have been privatized. The International Telecommunication Union is the United Nations agency that administers telecommunications and broadcasting regulations, although most countries also have their own government agencies to set and enforce telecommunications guidelines. In the United States, the Federal Communications Commission is the primary regulatory agency.

Within the large umbrella of companies that provide different types of telecommunications services are internet service providers, wireless service providers, radio and television broadcasters, cable companies, satellite television providers and managed service providers.

The word telecommunications comes from the Greek prefix tele, which means distant, combined with the Latin word communicare, which means to share.

This was last updated in September 2016

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With all the recent hacks/attacks int the news we read about it makes me wonder how safe are we from a possible hardware breach? Can a physical line hijacked or tapped into and steal transmitted data before any software security measures are even reached?
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How have telecommunications networks evolved in the age of wireless?
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uhmm they have evolved in such a way that many things have changed... phones, mouses, many things all wireless ...I even hope to see wireless desktops
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The Future is Defo in IP Communications Across Sheffield. 

VoIP phones along with SIP phones, use an internet protocol that allows phones to connect to either a LAN connection or a wireless connection, and make phone calls over the internet as opposed to through conventional telephone lines. The reduction in telephone bill costs can be significant.

Many new VoIP phones also incorporate SIP (Session Initiation Protocol) to connect between users. SIP can enhance the experience of using VoIP phones as it allows users to inlcude multimedia in their conversations. Many people in the VoIP phones community have embraced the development of SIP technology which is in it's infant stages but has the potential to bring about substantial changes to P2P communications.

VoIP phones come in many shapes and sizes and we present to you a wide range of models from leading manufacturers including corded and cordless VoIP phones and even a SIP enabled phone that can double as a mobile phone.

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