The Fiber Optics Illustrated Dictionary - Part 104 fills a gap in the literature by providing instructors, hobbyists, and top-level engineers with an accessible, current reference. From the author of the best-selling Telecommunications Illustrated Dictionary, this comprehensive reference includes fundamental physics, basic technical information for fiber splicing, installation, maintenance, and repair, and follow-up information for communications and other professionals using fiber optic components. Well-balanced, well-researched, and extensively cross-referenced, it also includes hundreds of photographs, charts, and diagrams that clarify the more complex ideas and put simpler ideas into their applications context | Fiber Optics Illustrated Dictionary WTB Wireless Telecommunications Bureau. An organization of the Federal Communications Commission FCC . WTLS See Wireless Transport Layer Security. WTO World Trade Organisation. An international organization established in 1994. As the Internet has become a significant vehicle for domestic and international commerce the WTO has become involved in discussions about electronic commerce and in the debate regarding intellectual property and domain name registration. The functioning of the WTO has been scrutinized by critics who are concerned about ensuring that there is adequate accountability built into the function and makeup of the organization. WTPF See World Telecommunication Policy Forum. WWV . Government National Institute of Standards and Technology NIST radio facility providing time and frequency standard voice announcements at a variety of high frequency HF broadcast wavelengths. WWVH operates 24 hours a day 7 days a week from a radio station in Colorado. The time is announced by a male voice based upon a 24-hour clock at the Greenwich meridian. WWYH broadcasts on 5 10 and 15 MHz at 10 000 watts and on MHz and 20 MHz at 2500 watts using individual transmitters for each frequency. WWV uses five half-wave vertical antennas. Modulation is double-sideband amplitude modulation AM . See WWVB WWYH. WWVB A . Government National Institute of Standards and Technology NIST radio facility providing time and frequency standards broadcast at 60 kHz with 50 kW of power from Fort Collins Colorado. WWVH operates 24 hours a day 7 days a week. Unlike WWV and WWYH this is not a voice announcement service but rather a reference based upon a stable radio frequency transmission that can be traced to the national standard. At WWVB a time code is synchronized with the carrier for continuous broadcast at a rate of 1 bps using pulse-width modulation. The time code bits are produced by reducing and restoring carrier power thus creating a low
