The story of the humble telephone begins in earnest with the invention of the telegraph machine. this invention signified the beginning of the idea of communicating over long distances using wires and electricity. Early models of the telegraph machine were being invented and experimented on all over the world throughout the late 1820s and 1830s.
The first commercial electrical telegraph was patented in 1837 by Sir William Fothergill Cooke and Charles Wheatstone, and was intended for use solely as warning system. It was successfully demonstrated on 25th July 1837 between Euston Station and Camden town in London, and was first used commercially by the Great Western Railway over the 13 miles railway between Paddington Station and West Drayton in 1839.
In the USA a similar story was simultaneously occurring, with the telegraph being independently developed by Samuel Morse (whence Morse Code) and Alfred Vail. By 1844 they had constructed an experimental telegraph line extending from Washington DC to Baltimore, and Morse was able to send his famous first message: ‘What hath God wrought’. By 1861 the telegraph had proliferated to the extent that the Californian network was ultimately connected to the wider network, and thus the first transcontinental telegraph system was established.
The birth of modern telecommunications
Towards the end of the 1800s various inventors around the world were discovering methods improve the existing telegraph system. Now that the infrastructure of all the wires was in place, the race was on to find a way of sending multiple messages simultaneously via one wire. the aim was to do this by using audio frequencies at different modulations simultaneously.
Some of the inventors who were involved are Alexander Graham Bell,Elisha Gray, Thomas Edison, Johann Philipp Reis, Antonio Meucci and. It is important to mention them all, as there was (and still is) immense controversy over who first invented the electric telephone, and thus who should be awarded the legal patent to the design. the very early history of telephony is littered with an unedifying mass of lawsuits, claims and counterclaims, contested patents, and objections. Ultimately the patents (and the credit) were awarded to Alexander Graham Bell and Thomas Edison, who used them to enormous commercial advantage.
Experimentation and the first networks
The earliest phones were, from a technical point of view, extremely diverse, as there was still a great deal of experimentation going on to determine the optimal technologies. Early phones derived their power from a local battery instead of from the grid. this continued until the 20th Century, when the power began to be transmitted over the wires from the telephone exchange.
Many of the earliest telephones also only have one wire for both the transmission and receipt of audio messages. Therefore people had to alternate between listening and speaking via the same aperture – and to take turns speaking to avoid drowning each other out. Initially, the pre-existing telegraph network was not exploited, and customers wishing to have a telephone connection would need to buy two or more telephones, one for each required location, and then arrange for lines to be fixed between them, without the possibility of calling external lines.
Manual exchanges and consumer phones
The manual switchboard exchange survived long into the twentieth century, as the uptake of telephone systems rapidly increased. By 1904 the United States boasted over 3 million telephones, the number increasing speedily despite the fact that competing telephone networks in the US did not connect with each other.
In 1927 the Bell Model 102 was released. this style of telephone proved to have the greatest longevity of any type – in some cases lasting for decades despite further developments. By the 1930s this design was improved to include the ringer and better electronics. in fact the technology of the phone remained effectively the same until the advent of touch-tone dialing in the 1960s began to replace the rotary dial.
Design and diversification
The mid to late twentieth century saw the dissolution of the major telecommunications monopolies by national governments, and the liberalisation of the industry to an army of smaller private companies. this had a tremendous impact on the form and function of the phone, creating a huge variety in their shape and appearance. It’s around here that we retire from the picture, preferring the clear elegance and simplicity of the earlier phones, to the technological advancements of later developments.