Telecommunications is the set of systems that move information, whether that information is text, data, images, or video, from one place to another. The older story starts with the electric telegraph, which turned communication into an electrical event instead of a physical one. The Institution of Engineering and Technology’s timeline places the growth of modern telecom thinking within this same industrial era, beginning with the Society of Telegraph Engineers in 1871 and then tracing the scientific work that made later systems possible. James Clerk Maxwell’s 1873 work on electromagnetism gave communications a mathematical foundation, and Jean-Maurice Émile Baudot’s 1874 telegraph code made signaling more efficient by standardizing symbol length.
That foundation prepared the ground for the telephone. Alexander Graham Bell built his first experimental telephone in 1875 and sent the first spoken words over the telephone in 1876 to Thomas Watson. The same period also saw legal and commercial battles around the invention, patenting, and scaling of the technology.
The telephone turned communication into a daily utility
Once the telephone arrived, communication stopped being a delayed message and became an immediate exchange. The telegraph and telephone were the major 19th-century advances. The telephony moved quickly from a prototype to infrastructure, with Bell Telephone Company formed in 1877 and the first public manual exchange opened in London in 1879. Manual exchanges also changed the labor market, since calls were routed by operators rather than by automated switching at first.
At the same time, telephony did not stay isolated. Carrier design, microphone design, exchange systems, and transmission methods improved in rapid succession. By 1880, telephone service had already become a policy issue, and by 1890, the sector was moving from isolated local systems toward larger, more connected networks.
Radio broke the wall of distance
Wireless communication changed everything. Marconi’s 1901 transatlantic wireless transmission from Cornwall to Newfoundland was a landmark that proved messages could cross oceans without a physical cable. A few years earlier, radio science had already been moving from theory to practice through work on electromagnetic waves and signal propagation, and the early 1900s became the era in which communication escaped the line and entered open space.
That same leap was followed by broadcasting and satellite communication. The launch of SCORE, the first satellite to relay voice signals, and later TELSTAR in 1962, enabled live television between Europe and the United States.
Digital switching laid the path to the Internet
In the 1960s and 1970s, telecommunications shifted from analogue systems toward digital ones. We witnessed a trial electronic digital telephone exchange in 1962, packet-switching proposals in 1968, ARPANET in 1969, and TCP in 1974. The Internet grew out of telecom engineering, especially the idea that information could be broken into packets, routed efficiently, and reassembled at the destination.
CERN’s history of the Web shows the final transformation clearly. Tim Berners-Lee proposed the World Wide Web in March 1989; the first browser, website, and server went live at CERN in late 1990, and the Web was placed in the public domain in 1993. By the end of 1994, CERN records say the Web already had 10,000 servers and 10 million users. Telecom networks were now carrying not only voice and broadcast traffic but also web traffic, search, email, file transfer, and then everything that came after.
Mobile phones made connectivity personal
1973 marks the year Motorola developed the first handheld mobile telephone for use in a cellular network. Martin Cooper’s first mobile call in 1973 became a symbolic break with the old fixed-line world. What had once been a desk-bound service became portable, personal, and constant. Infrastructure moved from buildings to roads, pockets, and eventually to people’s daily routines.
Early mobile phones were bulky, expensive, and limited in coverage, yet each generation of wireless technology pushed communication further into everyday life. Today, people move between countries while staying connected through digital services such as SIMOVO eSIM, which reflects how far telecom has evolved from fixed telephone lines and region-locked communication systems
Connectivity today is broad, but uneven
In November 2025, 6 billion people were using the Internet, about three-quarters of the world’s population, while 2.2 billion remained offline. The report estimated that 5G subscriptions had reached about 3 billion, roughly one-third of all mobile broadband subscriptions worldwide, and that 5G networks covered 55 per cent of the world’s population. Those are huge achievements by historical standards, yet the divide remains sharp: 84 per cent of people in high-income countries had 5G access, compared with only 4 per cent in low-income countries.
Telecommunications began with Morse code, matured through telephone exchanges and radio towers, crossed the planet through satellites and undersea systems, and then turned into packet-switched data networks and the Web. Now it lives in cloud platforms, mobile broadband, and wireless standards that update every few years.