1	AT&T Broadband Technology Efficiency, Data Sharing & Security
2	How Fiber Works Fiber Optic technology is simply a method of carrying information from one point to another in the form of light utilizing a thin strand of glass or plastic that serves as the transmission medium over which the information passes Fiber optic cables are long, thin strands of very pure glass about the size of a human hair Data is transmitted with light pulses, as opposed to electrical current
3	Bandwidth & Communication Fiber Optics delivered over glass has unlimited capacity and bandwidth Carries more information over longer distances than electrical signals can carry in a copper or coaxial medium Able to transmit digitized light signals well beyond 60 miles (100 km) without amplification Minimizes loss of signal strength in system Ensures signal integrity Minimizes jitter and data rate errors Minimizes degradation of high-speed digital signal
4	Copper Cable vs. Fiber Optics Fiber optic cable has many advantages over copper cable: Transmits data faster over longer distances Smaller in diameter & weighs less Immune to RFI (radio frequency interference and EMI (electromagnetic Interference) making them ideal for applications where close proximity to electronic devices can cause RFI and EMI disruption Uses less power and provides less signal degradation than copper Generally non-flammable Virtually unable to be tapped (secure) Better suited for data and illumination transmission
5	Fiber is Extremely Secure Why? Impossible to remotely detect the signal being transmitted with the cable The only way is by actually accessing the physical optical fiber itself Requires intervention easily detectably by surveillance
6	DSL DSL - Fast Digital Subscriber Lease Line Means that the video signal, only needs to go one way –downstream from telephone CO to you Upstream – control signals allow you to order a movie and re-cue after a snack break All with bandwidth leftover, for video, telephone, data transmission, games and etc.
7	DSL Electronically adjusts the quality of a digital signal (over copper wire) keeping it clear and strong. Monitors and adjusts temperature changes, transmission variations, echoes, etc. Allows up to 4 switched TV signals All with bandwidth leftover, for video, telephone, computer use, games and etc.
8	Features of DSL Technology
9	History of the Internet 1957:The United States Department of Defense formed a small agency called ARPA (Advanced Research Projects Agency) to develop military science and technology. 1961-1965:The Massachusetts Institute of Technology (MIT) started to research sharing information in small, phone-linked networks 1966:Packet switching technology is getting off the ground, and small university networks are beginning to be developed. 1969:The Department of Defense commissions the ARPAnet for network research. 1973: ARPAnet goes global- University College of London and Norway's Royal Radar Establishment join up. 1974: Network intercommunication -data is now transmitted quickly and efficiently with the design of TCP (Transmission Control Program). 1976: Unix developed at AT and T; Queen Elizabeth sends out her first email message. 1979: USENET is developed.
10	History of the Internet (cont’d) 1982: Internet technology protocols are developed, commonly known as TCP/IP (Transmission Control Protocol and Internet Protocol). leads to one of the first definitions of an "internet" being a connected set of networks. 1985: The first registered domain is Symbolics.com 1988: First large-scale Internet worm affects thousands of Internet hosts. 1991: Tim Berners-Lee develops the World Wide Web. 1995-1997: RealAudio introduces Internet streaming technology, dial-up systems emerge 1998-present:The Internet continues to experience staggering growth. More people use the Internet to get connected to others, find information, conduct business, and share information than ever before in history.