Since its inception, efficiency and speed in the telecommunications industry have progressed rapidly thanks to fiber optic technology. In 1979, AT&T filled the telecommunications industry with revolutionary ideas by developing a way to transmit data using a lightweight cable, called fiber optics. This mode produced a bandwidth of 44,736 Mbps and could multiplex 672 trunk circuits onto a single fiber (Cole, M. 2000). However, this development was only the beginning of a huge extension into telecommunications, something that would steadily transform the industry. Although AT&T introduced fiber optic technology in 1979, it wasn't the first company to think of such a creative idea. The idea of ​​exchanging data using light was the idea of ​​Alexander Graham Bell in 1800. Bell always thought about the possibility that pulses of light could transfer speech signals, but under no circumstances did Bell have a reliable light source to experiment with. 'idea (Cheo, P. 1990). In 1880 Bell patented the Photophone, a telephone that operated by optical transmission. Unfortunately, Bell's invention was unsuccessful because it uses air as the mode of light transmission instead of the glass fibers used today. Copper wire was fundamentally more reliable than Bell's device at the time, causing his Photophone to fail (Hecht, J. 1999). Elaborating on Bell's concept, John Logie Bard, an English scientist, and Clarence W. Hansell, an American scientist, patented the design that used hollow glass tubes to transport television scenes in the 1920s. However, the patented tubes were sub-standard and suffered signal failure very easily. Bard and Hansell also run into the similar difficulty faced by Bell, failing to obtain consistent training,... middle of paper......on telecommunications: voice, data and the Internet.” Upper Saddle River, NJ: Prentice Hall. 2000.Columbia Concise Electronic Encyclopedia. “Fiber Optic Systems: OVERVIEW. 1994. Retrieved from Fotec. "Lennie Lightwave's Guide to Fiber Optic Jargon." Excerpt from Greatest Achievements. “The greatest achievements - 18. Lasers and fiber optics”. 2000. Excerpt from Hecht, J. “History of Fiber Optic.” 1999. Retrieved from Microsoft Encarta Online. “Optical Fiber”. 1997. Excerpted from Stafford, E., & McCann J. Fiber Optics and Laser Handbook. Blue Ridge Summit, Pennsylvania: Tab Books, Inc. 1988