Definitions of World Telecommunication/ICT Indicators, March 2010
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Digital Subscriber Line (DSL) Technologies
CHAPTER21 Chapter Goals • Identify and discuss different types of digital subscriber line (DSL) technologies. • Discuss the benefits of using xDSL technologies. • Explain how ASDL works. • Explain the basic concepts of signaling and modulation. • Discuss additional DSL technologies (SDSL, HDSL, HDSL-2, G.SHDSL, IDSL, and VDSL). Digital Subscriber Line Introduction Digital Subscriber Line (DSL) technology is a modem technology that uses existing twisted-pair telephone lines to transport high-bandwidth data, such as multimedia and video, to service subscribers. The term xDSL covers a number of similar yet competing forms of DSL technologies, including ADSL, SDSL, HDSL, HDSL-2, G.SHDL, IDSL, and VDSL. xDSL is drawing significant attention from implementers and service providers because it promises to deliver high-bandwidth data rates to dispersed locations with relatively small changes to the existing telco infrastructure. xDSL services are dedicated, point-to-point, public network access over twisted-pair copper wire on the local loop (last mile) between a network service provider’s (NSP) central office and the customer site, or on local loops created either intrabuilding or intracampus. Currently, most DSL deployments are ADSL, mainly delivered to residential customers. This chapter focus mainly on defining ADSL. Asymmetric Digital Subscriber Line Asymmetric Digital Subscriber Line (ADSL) technology is asymmetric. It allows more bandwidth downstream—from an NSP’s central office to the customer site—than upstream from the subscriber to the central office. This asymmetry, combined with always-on access (which eliminates call setup), makes ADSL ideal for Internet/intranet surfing, video-on-demand, and remote LAN access. Users of these applications typically download much more information than they send. -
The History of the Telephone
STUDENT VERSION THE HISTORY OF THE TELEPHONE Activity Items There are no separate items for this activity. Student Learning Objectives • I will be able to name who invented the telephone and say why that invention is important. • I will be able to explain how phones have changed over time. THE HISTORY OF THE TELEPHONE STUDENT VERSION NAME: DATE: The telephone is one of the most important inventions. It lets people talk to each other at the same time across long distances, changing the way we communicate today. Alexander Graham Bell, the inventor of the telephone CENSUS.GOV/SCHOOLS HISTORY | PAGE 1 THE HISTORY OF THE TELEPHONE STUDENT VERSION 1. Like many inventions, the telephone was likely thought of many years before it was invented, and by many people. But it wasn’t until 1876 when a man named Alexander Graham Bell, pictured on the previous page, patented the telephone and was allowed to start selling it. Can you guess what “patented” means? CENSUS.GOV/SCHOOLS HISTORY | PAGE 2 THE HISTORY OF THE TELEPHONE STUDENT VERSION 2. The picture below, from over 100 years ago, shows Alexander Graham Bell using one of his first telephones to make a call from New York to Chicago. Alexander Graham Bell making a telephone call from New York to Chicago in 1892 Why do you think it was important that someone in New York could use the telephone to talk to someone in Chicago? CENSUS.GOV/SCHOOLS HISTORY | PAGE 3 THE HISTORY OF THE TELEPHONE STUDENT VERSION 3. Today, millions of people make phone calls each day, and many people have a cellphone. -
Internet Freedom in China: U.S. Government Activity, Private Sector Initiatives, and Issues of Congressional Interest
Internet Freedom in China: U.S. Government Activity, Private Sector Initiatives, and Issues of Congressional Interest Patricia Moloney Figliola Specialist in Internet and Telecommunications Policy May 18, 2018 Congressional Research Service 7-5700 www.crs.gov R45200 Internet Freedom in China: U.S. Government and Private Sector Activity Summary By the end of 2017, the People’s Republic of China (PRC) had the world’s largest number of internet users, estimated at over 750 million people. At the same time, the country has one of the most sophisticated and aggressive internet censorship and control regimes in the world. PRC officials have argued that internet controls are necessary for social stability, and intended to protect and strengthen Chinese culture. However, in its 2017 Annual Report, Reporters Without Borders (Reporters Sans Frontières, RSF) called China the “world’s biggest prison for journalists” and warned that the country “continues to improve its arsenal of measures for persecuting journalists and bloggers.” China ranks 176th out of 180 countries in RSF’s 2017 World Press Freedom Index, surpassed only by Turkmenistan, Eritrea, and North Korea in the lack of press freedom. At the end of 2017, RSF asserted that China was holding 52 journalists and bloggers in prison. The PRC government employs a variety of methods to control online content and expression, including website blocking and keyword filtering; regulating and monitoring internet service providers; censoring social media; and arresting “cyber dissidents” and bloggers who broach sensitive social or political issues. The government also monitors the popular mobile app WeChat. WeChat began as a secure messaging app, similar to WhatsApp, but it is now used for much more than just messaging and calling, such as mobile payments, and all the data shared through the app is also shared with the Chinese government. -
The Internet and "Telecommunications Services," Universal Service Mechanisms, Access Charges, and Other Flotsam of the Regulatory System
The Internet and "Telecommunications Services," Universal Service Mechanisms, Access Charges, and Other Flotsam of the Regulatory System Jonathan Weinbergt In troduction .............................................................................................. 2 11 I. B ackground ...................................................................................... 2 14 A . InternetA rchitecture................................................................ 215 B . Telephone Regulation .............................................................. 217 1. The Federal-State Divide ................................................. 218 2. Comp uter II ...................................................................... 220 3. The 1996 Telecommunications Act ................................. 222 II. The Internet and Universal Service Mechanisms ............................ 225 A. The Report to Congress on Universal Service ......................... 225 B. The Breakdown of the Telecommunications/InformationService D istinction................................................................................ 227 C. Why the Telecommunications/InformationService D istinction Doesn't Work ........................................................ 232 D. Universal Service Redux .......................................................... 234 III. The Internet and Access Charges .................................................... 239 A . The Status Q uo ......................................................................... 239 B . Beyond the -
TELEPHONE TRAINING GUIDE] Fall 2010
[TELEPHONE TRAINING GUIDE] Fall 2010 Telephone Training Guide Multi Button and Single Line Telephones Office of Information Technology, - UC Irvine 1 | Page [TELEPHONE TRAINING GUIDE] Fall 2010 Personal Profile (optional) ........................................... 10 Group Pickup (optional) ............................................... 10 Table of Contents Abbreviated Dialing (optional) ..................................... 10 Multi-Button Telephone General Description Automatic Call-Back ..................................................... 10 ....................................................................................... 3 Call Waiting .................................................................. 10 Keys and Buttons ............................................................ 3 Campus Dialing Instructions ............................ 11 Standard Preset Function Buttons .................................. 3 Emergency 911 ............................................................. 11 Sending Tones (TONE) .................................................... 4 Multi-Button Telephone Operations ................ 4 Answering Calls ............................................................... 4 Placing Calls .................................................................... 4 Transferring Calls ............................................................ 4 Inquiry Calls .................................................................... 4 Exclusive Hold ................................................................. 4 -
Mass Media in the USA»
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by BSU Digital Library Mass Media In The USA K. Khomtsova, V. Zavatskaya The topic of the research is «Mass media in the USA». It is topical because mass media of the United States are world-known and a lot of people use American mass media, especially internet resources. The subject matter is peculiarities of different types of mass media in the USA. The aim of the survey is to study the types of mass media that are popular in the USA nowadays. To achieve the aim the authors fulfill the following tasks: 1. to define the main types of mass media in the USA; 2. to analyze the popularity of different kinds of mass media in the USA; 3. to mark out the peculiarities of American mass media. The mass media are diversified media technologies that are intended to reach a large audience by mass communication. There are several types of mass media: the broadcast media such as radio, recorded music, film and tel- evision; the print media include newspapers, books and magazines; the out- door media comprise billboards, signs or placards; the digital media include both Internet and mobile mass communication. [4]. In the USA the main types of mass media today are: newspapers; magazines; radio; television; Internet. NEWSPAPERS The history of American newspapers goes back to the 17th century with the publication of the first colonial newspapers. It was James Franklin, Benjamin Franklin’s older brother, who first made a news sheet. -
The Internet and Its Legal Ramifications in Taiwan
The Internet and its Legal Ramifications in Taiwan George C.C. Chen* INTRODUCTION The growth of the Internet over the last decade has been an astonishing phenomenon. Used by only a few academics in the late 1980s, it now has up to 65 million users worldwide.' Taiwan has followed the Internet trend eagerly, and already has approximately 500,000 users. Ever since United States Vice President, Albert Gore announced the U.S. National Information Infrastructure (Nil) project in Septem- ber 1993, many other countries have followed suit, initiating similar projects to establish a comprehensive information infrastructure. Many governments regard such development as a prerequisite for continuing national advancement in the 21 st century, and view success in this area as closely tied to the competitiveness of a nation's industry and the welfare of its people. In order to promote such a project, in June 1994, the Republic of China on Taiwan (hereinafter referred to as Taiwan) established an NII Special Project Committee2 (hereinafter referred to as the NII Committee) under the Executive Yuan.3 Under the NII Committee's direction, many activities are underway that are intended to serve as the foundation of Taiwan's development into a regional * Attorney-at-law; Director of Science & Technology Law Center (STLC), Institute for Information Industry in Taiwan; Secretary General of the Information Product Anti-Piracy Alliance of the Republic of China; Legal Member of the Private Sector Advisory Committee on National Information Infrastructure (NII) in Taiwan. STLC is Taiwan's only research organization fully focused on Internet and NII related legal issues. -
Growth of the Internet
Growth of the Internet K. G. Coffman and A. M. Odlyzko AT&T Labs - Research [email protected], [email protected] Preliminary version, July 6, 2001 Abstract The Internet is the main cause of the recent explosion of activity in optical fiber telecommunica- tions. The high growth rates observed on the Internet, and the popular perception that growth rates were even higher, led to an upsurge in research, development, and investment in telecommunications. The telecom crash of 2000 occurred when investors realized that transmission capacity in place and under construction greatly exceeded actual traffic demand. This chapter discusses the growth of the Internet and compares it with that of other communication services. Internet traffic is growing, approximately doubling each year. There are reasonable arguments that it will continue to grow at this rate for the rest of this decade. If this happens, then in a few years, we may have a rough balance between supply and demand. Growth of the Internet K. G. Coffman and A. M. Odlyzko AT&T Labs - Research [email protected], [email protected] 1. Introduction Optical fiber communications was initially developed for the voice phone system. The feverish level of activity that we have experienced since the late 1990s, though, was caused primarily by the rapidly rising demand for Internet connectivity. The Internet has been growing at unprecedented rates. Moreover, because it is versatile and penetrates deeply into the economy, it is affecting all of society, and therefore has attracted inordinate amounts of public attention. The aim of this chapter is to summarize the current state of knowledge about the growth rates of the Internet, with special attention paid to the implications for fiber optic transmission. -
Glossary of Terminology
Glossary of Broadband Terminology This glossary was compiled by Ray Elseth of Broadband Development 3 (http://www.bbd3.com) and Thomas Asp of Virchow Krause (http://virchowkrause.com), and is a supplement to “Broadband Access: The Local Government Role” by Thomas Asp, Harvey L. Reiter, Jerry Schulz, and Ronald L. Vaden (IQ Report 36, no. 2 [Washington, D.C.: ICMA, 2004]). 802.11 A family of specifications covering wireless connectivity between devices normally located within 100’ to 300’ of each other. Often referred to as Wireless Local Area Network (WLAN). Most common implementation is 802.11b (see Wi- Fi), but 802.11a and 802.11g are also in active use. 802.15 A family of specifications covering wireless connectivity between devices normally located within 10’ to 30’ of each other. Often referred to as Wireless Personal Area Network (WPAN). Implemented as “Bluetooth.” 802.16 A family of specifications covering wireless connectivity between devices normally located within 1 to 30 miles of each other. Often referred to as Wireless Metropolitan Area Network (WMAN). Access Point (AP) A hardware device that acts as a connectivity hub to permit users of a wireless device to connect to a wired local area network. Provides a bridge between Ethernet wired LANs (local area networks) and the wireless network. Access points are the connectivity point between Ethernet wired networks and devices equipped with a wireless LAN adapter card. Antenna The equipment that allows the transmission or reception of radio frequency energy. Asynchronous Digital A technology that allows high-speed data to be sent over a Subscriber Line single pair of existing copper telephone lines, with data rates (ADSL) for receiving data differing from data rates for sending data. -
QUESTION 20-1/2 Examination of Access Technologies for Broadband Communications
International Telecommunication Union QUESTION 20-1/2 Examination of access technologies for broadband communications ITU-D STUDY GROUP 2 3rd STUDY PERIOD (2002-2006) Report on broadband access technologies eport on broadband access technologies QUESTION 20-1/2 R International Telecommunication Union ITU-D THE STUDY GROUPS OF ITU-D The ITU-D Study Groups were set up in accordance with Resolutions 2 of the World Tele- communication Development Conference (WTDC) held in Buenos Aires, Argentina, in 1994. For the period 2002-2006, Study Group 1 is entrusted with the study of seven Questions in the field of telecommunication development strategies and policies. Study Group 2 is entrusted with the study of eleven Questions in the field of development and management of telecommunication services and networks. For this period, in order to respond as quickly as possible to the concerns of developing countries, instead of being approved during the WTDC, the output of each Question is published as and when it is ready. For further information: Please contact Ms Alessandra PILERI Telecommunication Development Bureau (BDT) ITU Place des Nations CH-1211 GENEVA 20 Switzerland Telephone: +41 22 730 6698 Fax: +41 22 730 5484 E-mail: [email protected] Free download: www.itu.int/ITU-D/study_groups/index.html Electronic Bookshop of ITU: www.itu.int/publications © ITU 2006 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. International Telecommunication Union QUESTION 20-1/2 Examination of access technologies for broadband communications ITU-D STUDY GROUP 2 3rd STUDY PERIOD (2002-2006) Report on broadband access technologies DISCLAIMER This report has been prepared by many volunteers from different Administrations and companies. -
Financial Analysis Summary Update 2021
FINANCIAL ANALYSIS SUMMARY UPDATE 2021 Prepared by Rizzo, Farrugia & Co (Stockbrokers) Ltd, in compliance with the Listing Policies issued by the Malta Financial Services Authority, dated 5 March 2013. 10 May 2021 TABLE OF CONTENTS IMPORTANT INFORMATION LIST OF ABBREVIATIONS PART A BUSINESS & MARKET OVERVIEW UPDATE PART B FINANCIAL ANALYSIS PART C LISTED SECURITIES PART D COMPARATIVES PART E GLOSSARY 1 | P a g e IMPORTANT INFORMATION PURPOSE OF THE DOCUMENT Cablenet Communication Systems plc (the “Company”, “Cablenet”, or “Issuer”) issued €40 million 4% bonds maturing in 2030 pursuant to a prospectus dated 21 July 2020 (the “Bond Issue”). In terms of the Listing Policies of the Listing Authority dated 5 March 2013, bond issues targeting the retail market with a minimum subscription level of less than €50,000 must include a Financial Analysis Summary (the “FAS”) which is to be updated on an annual basis. SOURCES OF INFORMATION The information that is presented has been collated from a number of sources, including the Company’s website (www.cablenet.com.cy), the audited financial statements for the years ended 31 December 2018, 2019 and 2020, and forecasts for financial year ending 31 December 2021. Forecasts that are included in this document have been prepared and approved for publication by the directors of the Company, who undertake full responsibility for the assumptions on which these forecasts are based. Wherever used, FYXXXX refers to financial year covering the period 1st January to 31st December. The financial information is being presented in thousands of Euro, unless otherwise stated, and has been rounded to the nearest thousand. -
Cable Versus Dsl
53-10-60 DATA COMMUNICATIONS MANAGEMENT CABLE VERSUS DSL John R. Vacca INSIDE DSL; Cable Modems; ADSL; CDSL; G.Lite; HDSL; IDSL; RADSL; SDSL; VDSL; POTS; DSL and Cable Modem Rollouts; High-Speed Data Entry; Buying DSL Service; Installing DSL; Security Problems, Residential Users, Telecommuters, DSL System Components; DSL Network; DSL Hubs INTRODUCTION Internet access via cable modem has become available in many residen- tial areas over the past few years. Cable has the capacity to transmit data at speeds as fast as Digital Subscriber Line (DSL) when configured prop- erly and under optimal conditions. Due to the fact that cable lines are not available in the vast majority of commercial districts, cable does not com- pete with DSL in the enterprise market at all, in most cases. Cable was designed for residential use, and in some cases may be a cost-effective solution for residential high-bandwidth Internet access. Therefore, the challenge of cable versus DSL is primarily in the residential and telecom- muter markets. With that in mind, and before continuing with the theme of this article (cable vs. DSL), one can take a look at the technology issues first, and then some basic terminology. TECHNOLOGY ISSUES What is DSL? How does it work? What are the types of DSL? These are some of the questions this article will surely answer; as well as some of the pros and cons of the use of cable modems versus DSL. PAYOFF IDEA The article discusses the current state of cable DSL: What Is It? modem access versus DSL. It also examines how In essence, by using the existing tele- prevalent cable modem and DSL services are in major U.S.