...ISDN & DSL Broadband Connections Thiago C. Gandarillas ISSC 340 American Military University Prof Kageorgis Throughout this paper we will review all the concepts regarding the ISDN and DSL technologies, definition, usage, benefits overall and costs. We will also compare to newer technologies overall to understand where our connections capabilities were and where they are over today’s date and where it is going. ISDN (Integrated Services for Digital Network) is a standard way to communicate digital transmission of data, voice, video and other network devices at the same at the same time over the traditional ‘’phone lines’’, basic telephone copper wires, called RJ-48 connectors. Prior to ISDN, the telephone system was only related to voice transportation, with very limited to none data service availability. The ISDN has the capability to support at least two or more connections at the same time, in any combination of voice, data, fax and video over a single line. At first ISDN speeds were only at max 128 kbits over download and upload speeds. Eventually carried over an E1, speed rates could be at 2048 kbps. (PC Magazine, 2001) ISDN-BRI (Basic Rate Interface), service is delivered through a pair of standard telephone copper wires at 128 kbps rate. Following available interfaces and their characteristics: * U Interface, usually a non-North American network, two wired interface between the network terminating unit and the exchange. * T Interface is a serial...
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...Wireless Networks & Network Security ISSC 340 Professor Vijay Venkatesh James Lange 08/13/2013 Wireless Networks are somewhat new technology in comparison to the know-how that makes them possible. The knowledge regarding wireless technology goes back about 200 years. One of the first individuals deserving recognition for today’s wireless networks is a scientist, inventor and politician named Benjamin Franklin. In 1747 he had built a model that showed how electricity could move through the air unaided by any type of wiring. In the early 1750’s Mr. Franklin started experimenting with electricity and the rest is history. Franklin was under the belief that lightening was an electrical current. So with the famous kite and key experiment he proved to himself and others that he was right. His fascination with electricity led him to later experiments with an electrical tube given to him by a friend. A second individual that played a part in today’s wireless technology is Hans Christian Oersted. In 1819 he had found that a compass needle had movement if it was presented with electrical current. This relationship between the needle and the electricity is an essential part of electromagnetism. It is said that this discovery by Oersted happened completely by chance. While preparing for one of his lectures he was setting up some of his equipment. The compass and battery were in close proximity to each other and the needle moved from magnetic north whenever the switch to the...
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...9-805-130 REV: JULY 8, 2009 LYNDA M. APPLEGATE ROBERT AUSTIN ELIZABETH COLLINS IBM's Decade of Transformation: Turnaround to Growth This is my last annual letter to you. By the time you read this, Sam Palmisano will be our new chief executive officer, the eighth in IBM’s history. He will be responsible for shaping our strategic direction as well as leading our operations. . . . I want to use this occasion to offer my perspective on what lies ahead for our industry. To many observers today, its future is unclear, following perhaps the worst year in its history. A lot of people chalk that up to the recession and the “dot-com bubble.” They seem to believe that when the economies of the world recover, life in the information technology industry will get back to normal. In my view, nothing could be further from the truth. Lou Gerstner, IBM Annual Report, 2001 In 1990, IBM was the second-most-profitable company in the world, with net income of $6 billion on revenues of $69 billion, and it was completing a transformation designed to position it for success in the next decade. For the world leader in an industry that expected to keep growing spectacularly, the future looked promising. But all was not well within IBM, and its senior executives realized it. “In 1990, we were feeling pretty good because things seemed to be getting better,” one executive remarked. “But we weren’t feeling great because we knew there were deep structural problems.” Those structural problems revealed...
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...9-805-130 REV: JULY 8, 2009 LYNDA M. APPLEGATE ROBERT AUSTIN ELIZABETH COLLINS IBM's Decade of Transformation: Turnaround to Growth This is my last annual letter to you. By the time you read this, Sam Palmisano will be our new chief executive officer, the eighth in IBM’s history. He will be responsible for shaping our strategic direction as well as leading our operations. . . . I want to use this occasion to offer my perspective on what lies ahead for our industry. To many observers today, its future is unclear, following perhaps the worst year in its history. A lot of people chalk that up to the recession and the “dot-com bubble.” They seem to believe that when the economies of the world recover, life in the information technology industry will get back to normal. In my view, nothing could be further from the truth. Lou Gerstner, IBM Annual Report, 2001 In 1990, IBM was the second-most-profitable company in the world, with net income of $6 billion on revenues of $69 billion, and it was completing a transformation designed to position it for success in the next decade. For the world leader in an industry that expected to keep growing spectacularly, the future looked promising. But all was not well within IBM, and its senior executives realized it. “In 1990, we were feeling pretty good because things seemed to be getting better,” one executive remarked. “But we weren’t feeling great because we knew there were deep structural problems.” Those structural problems revealed...
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...the prior written permission of the Publisher, or authorization through payment of the appropriate per-copy fee to the Copyright Clearance Center, Inc. 222 Rosewood Drive, Danvers, MA 01923, website www.copyright.com. Requests to the Publisher for permission should be addressed to the Permissions Department, John Wiley & Sons, Inc., 111 River Street, Hoboken, NJ 07030-5774, (201) 748-6011, fax (201) 748-6008, website www.wiley.com/go/permissions. To order books or for customer service please, call 1-800-CALL WILEY (225-5945). ISBN 978-0-470-34381-4 Printed in the United States of America 10 9 8 7 6 5 4 3 2 1 Preface Information technology and business are becoming inextricably interwoven. I don’t think anybody can talk meaningfully about one without the talking about the other.1 Bill Gates Microsoft I’m not hiring MBA students for the technology you learn while in school, but for your ability to learn...
Words: 175164 - Pages: 701
...the prior written permission of the Publisher, or authorization through payment of the appropriate per-copy fee to the Copyright Clearance Center, Inc. 222 Rosewood Drive, Danvers, MA 01923, website www.copyright.com. Requests to the Publisher for permission should be addressed to the Permissions Department, John Wiley & Sons, Inc., 111 River Street, Hoboken, NJ 07030-5774, (201) 748-6011, fax (201) 748-6008, website www.wiley.com/go/permissions. To order books or for customer service please, call 1-800-CALL WILEY (225-5945). ISBN 978-0-470-34381-4 Printed in the United States of America 10 9 8 7 6 5 4 3 2 1 Preface Information technology and business are becoming inextricably interwoven. I don’t think anybody can talk meaningfully about one without the talking about the other.1 Bill Gates Microsoft I’m not hiring MBA students for the technology you learn while in school, but for your ability to learn...
Words: 175164 - Pages: 701
...written permission of the Publisher, or authorization through payment of the appropriate per-copy fee to the Copyright Clearance Center, Inc. 222 Rosewood Drive, Danvers, MA 01923, website www.copyright.com. Requests to the Publisher for permission should be addressed to the Permissions Department, John Wiley & Sons, Inc., 111 River Street, Hoboken, NJ 07030-5774, (201) 748-6011, fax (201) 748-6008, website www.wiley.com/go/permissions. To order books or for customer service please, call 1-800-CALL WILEY (225-5945). ISBN 978-0-470-34381-4 Printed in the United States of America 10 9 8 7 6 5 4 3 2 1 Preface Information technology and business are becoming inextricably interwoven. I don’t think anybody can talk meaningfully about one without the talking about the other.1 Bill Gates Microsoft I’m not hiring MBA students for the technology you learn while in...
Words: 175167 - Pages: 701
