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Distance Telecommunications through the Ages

Distance Telecommunications through the Ages... Prehistoric Smoke Signals The smoke signal is one of the oldest forms of long-distance communication. It is a form of visual communication that can be seen over a long distance. I. S In Ancient China, soldiers stationed along the Great Wall would alert each other of impending enemy attack by signaling from tower to tower. 6th Century BC Mail Communication by written documents which are carried by an intermediary from one person or place to another dates back to the invention of writing, but development of formal postal systems occurred much later. S The first documented use of an organized courier service was in Egypt, where Pharaohs used couriers for the diffusion of their decrees in the territory of the State (2400 BC). Pigeon Post 5th Century BC Pigeon post is where homing pigeons carry messages from one place to another. Pigeons were effective as messengers due to their natural homing abilities. The pigeons were transported to their destination in cages, where they would be attached with messages, then naturally the pigeon would fly back to its home where the owner could read his mail. Pigeons have been used to great effect in military situations, with 32 birds winning the Dickin Medal. 4th Century BC Hydraulic Semiphores A hydraulic telegraph was one of two hydraulic-telegraphic telecommunication systems, one developed in 4th century BCE Greece, and the other in 19th century AD Britain. The Greek system was deployed in combination with semaphoric fires, while the latter British system was purely hydraulic. S The ancient Greek system transmitted its semaphoric information to the receiver visually, which limited its use to line-of-sight distances in good visibility weather conditions only. The 19th century British system used water-filled pipes to effect changes to the water level in the receiver unit, limited by range of pressure. 490 BC Heliograph A heliograph (Greek:"HAioç helios, meaning "sun", and ypadeiv graphein, meaning "write") is a wireless solar telegraph that signals by flashes of sunlight which are reflected by a mirror. The flashes are produced by momentarily pivoting the mirror, or by interrupting the beam with a shutter. S The heliograph was a simple but effective instrument for instantaneous optical communication over long distances during the late 19th and early 20th century. Its main uses were military, survey and forest protection work. Heliographs were standard issue in the British and Australian armies until the 1960s, and were used by the Pakistani army as late as 1975. Haliograph 99 15th Century Semaphore Line A semaphore line is a system of conveying information by means of visual signals, using towers with pivoting shutters, also known as blades or paddles. Information is encoded by the position of the mechanical elements; it is read Maritime Flags The system of international maritime signals is where a system of flag signals represent individual letters of the alphabet to enable you to signal to or from ships. It is a component of the International Code of Signals (ICS). when the shutter is in a fixed position. These systems were popular in the late 18th to early 19th century. 1790 Electrical Telegraph An electrical telegraph uses electrical signals, conveyed via telecommunication lines or radio. The electromagnetic telegraph is a device for human-to-human transmission of coded text messages. S The electrical telegraph, became the first form of electrical telecommunications. In a matter of decades electrical telegraph networks permitted people and commerce to almost instantly transmit messages across both continents and oceans, with widespread social and economic impacts 6. 1838 Telephone The telephone (from the Greek: thde, tēle, "far" and pwvn, phoně, "voice"), colloquially referred to as a phone, is a telecommunications device that transmits and receives sounds, usually the human voice. Telephones are a point-to-point communication system whose most basic function is to allow two people separated by large distances to talk to each other. BRR SS Developed in the mid-1870s by Alexander Graham Bell and others, the telephone has long been considered indispensable to businesses, households and governments, is now one of the most common appliances in the developed world. The word "telephone" has been adapted to many languages and is now recognized around the world. 1876 Photophone The photophone (also known as a radiophone) is a telecommunications device which allowed for the transmission of both articulated sounds and normal human conversations on a beam of light. It was invented jointly by Alexander Graham Bell and his assistant Charles Sumner Tainter on February 19, 1880, at Bell's 1325 'L' Street laboratory in Washington, D.c. S On April 1, 1880, Bell's assistant transmitted the world's first wireless telephone message to him from the roof of the Franklin School to the window of Bell's laboratory, some 213 metres (700 ft) away. 1880 1896 Radio Radio is the transmission of signals through free space by electromagnetic waves with frequencies significantly below visible light, Electromagnetic radiation travels by means of ocillating electromagnetic fields that pass through the air and the vacuum of space. Information, such as sound, is carried by systematically changing (modulating) some property of the radiated waves, such as their amplitude, frequency, phase, or pulse width. When radio waves strike an electrical conductor, the oscillating fields induce an alternating current in the conductor. The information in the waves can be extracted and transformed back into its original form. 1927 Television Commercially available since the late 1920s, the television set has become commonplace in homes, businesses and institutions. 6 Since the 1970s the availability of video cassettes, laserdiscs, DVDS and now Blu-ray Discs, have resulted in the television set frequently being used for viewing recorded as well as broadcast material. In recent years Internet television has seen the rise of television available via the Internet and on demand. 1930 Videophone The earliest public videophone service was launched in the mid-1950s by AT&T. It was actually Germany's Reichspost which first introduced such a service in 1936, on the occasion of the Olympic Games, held that year in Berlin. Computer Network The Whirlwind, the first interactive computer that worked in real-time, was unveiled at MIT in April 1950. It was the first time video was used as an output device, in the form of a giant oscilloscope screen. Later versions were used as a backbone FQ of SAGE, the air defence system of the US Air Force and also the first computer network. 1969 Analog Cell Phone 1982 The earliest public videophone service was launched in the mid-1950s by AT&T. Or so Babbage assumed. Research for a piece on the rise of video communication revealed this SMTP Email received wisdom to be spurious. It was actually Germany's Reichspost which first introduced such i a service in 1936, on the occasion of the Olympic Games, held that year in Berlin. Originally a text-only (7-bit ASCII and others) communications medium, email was extended to carry multi-media content attachments, 1981 FIRST GENERATION 1992 1995 2001 2G Internet 3G SECOND The Internet was commercialized in 1995 when GENERATION NSFNET was decommissioned, removing the last restrictions on the use of the Internet to carry commercial traffic. Since the mid-1990s the Internet has had a drastic impact on culture and commerce, including the rise of near-instant communication by electronic mail, instant messaging, Voice over Internet Protocol (VolP) "phone calls", two-way interactive video calls, and the World Wide Web with its discussion forums, blogs, social networking, and online shopping sites. 2011 The Internet continues to grow, driven by ever greater amounts of online information and knowledge, commerce, entertainment and social networking. 34G Convergence The start of the second decade of the 21st century ushers in true "convergence". The dividing lines between mobile handsets, 'tablets', desktop computers and home TV services begin to blur as many functions – watching videos, surfing the internet, and messaging friends and family - can now be done on many of these devices. Traditional business models are shaken up as 'quad-play' services- telephony, internet, TV and mobile – are now offered by a multitude of providers: mobile telecoms providers offer TV services; TV broadcasters offer internet access, fixed line telecoms operators offer mobile services, and so on. Whether for work or for pleasure, these technology & business model developments will have a profound impact on the way users interact with each other, and buy, consume, and share digital content. 2014 ING!

Distance Telecommunications through the Ages

shared by iamandrewg on Jan 04
This infographic shows the transformation of telecommunications throughout the ages, right up to the present day.


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