Alexander Graham Bell probably had no idea that he had discovered what would eventually change the world in more ways than you can imagine. The technology began for phones has led to more discoveries in the field of telecommunications that keep people in touch and connected worldwide.
The Early Days
On March 10, 1876 Alexander Graham Bell sent the first speech using electricity. From the day the communication changed every aspect of life. Although not immediately change the world, put the communication path that would change the future of communication.
The initial lack of acceptance discovery Mr Bell was due Telegraph be in a form of communication and it had been around for over 50 years. This voice over electrical lines that Mr. Bell was proposing a new and daunting discovery.
At the end of 1870 when Bell took his demonstrations of public telephone services on the road in an effort to increase awareness and public finance for the project. Mr. Bell introduced the telephone broadcasting system.
Originally phones connected only two lines. In June30, 188 were 287 telephone installed, July was 750. Ten years later it was 167,000 phones a maze of wires overhead. (Pool, Ithiel de Sola; _The Social Impact Telephone_; Cambridge, MIT Press, 1977)
Mr. Bell was not the only one working on ideas that would impact telephony. Thomas Edison invented the first transmitter and receiver that would be practical for commercial use. He had already found the type of multiplexing allowed to be sent in opposite directions simultaneously.
Many more changes occurred in the ensuing years, AT & T incorporated in 1885 to rent phones to homes and offices but retained ownership of the technology.
Then, in 1880 switchboard came on board. At this time, there was no call, no signaling system, and no electronic switches. Visitors would crank handle; get the operator then connects them to their party and then have their conversation. This type of system had no ringer to release calls and no privacy because the proprietor of men keep the call together.
By 1946 the number of guest call made jobs Switchboard operators too much for people to handle alone. Almost a quarter of a million operators were working for AT & T in 1946, but that number would decrease dramatically with the invention of automatic call switching.
Although this switching system was invented in 1889, it was not until 1914 that it was installed on a large scale basis in New Jersey. It was not until 1976 that the first computerized switch was put into operation and by 1982 nearly half of all calls were switched electronically.
Bell patents expired at the turn of 6000 independent phone companies opened shop. These independent companies could only be related site, AT & T refused to allow them to connect to the national grid. Instead, they waited for the little guy to go bankrupt and then bought them out.
In 1984, AT & T got out of the local telephone service at the end of ten years of lawsuits push to break up the telecommunications giant. This led to the forming of the so-called “Baby Bell ‘. This Breakup also allowed users to have a phone and hook up their own devices to them.
Before the 20th century phone systems use twisted copper wires that were expensive setting up and absorbed a lot of energy. the next few years would see copper wire depart coaxial cables, the microwave stations and the communications satellite.
Digital transmission, although not new, not come into play phone in a big way in 1980’s. the use of fiber optic cable, digital transmission up to 125,000 times faster than copper cables. copper wire is still in use in many areas due to the high costs associated with running a fiber to each home, although many areas have been in place lines with optical fiber.
Having mastered the basic telephone and communication over long distances, there were still technical progress waiting to be discovered. Fax Machine uses telephone lines to transmit digital signals to a modem for receiving the decoded signal in a message. Then came the mobile phone or cell phone.
Mobile phones appeared in the early 1980s and today there are millions in use. Phone networks use a regular phone system connected to the computer center and transmission towers to send a message. Originally there were few transmission towers and mobile phones were bulky and had to use near a tower in order to have a clear transmission.
Within a few years, phones became small enough to fit in the palm of the hand and the towers were located almost everywhere. While there are areas with poor reception, most cell phones are always usable area.
Today, cell phones do much more than just allow for voice conversations, allowing mobile access to the Internet, email, business applications, photos and much more.