Table of Contents Preface...................................................................................................... vii Introduction.............................................................................................. xiii Acronyms and Abbreviations................................................................... 1 Annex A.................................................................................................... 383 Annex B.................................................................................................... 387 Preface Abbreviations are the important part of any scientific language of modern life.Inrecentdecades,allbranchesofsciencehavebeenwidelyexpanded and many words and terms have been utilized to express their concept. Many of them are compoundphrases and high-frequencyterms, and if we use them as they are, our speech and writing becomes very lengthy and boring. That is why people prefer the short forms (abbreviations) for frequently used compound phrases. The main objective of technical abbreviations is to save time and decrease speech and writing to facilitate engineers’ communication. The other intention is the explicitness, fluency, and beauty of our speech and writing. Any method, which can help us to achieve these goals, is acceptable. Abbreviations contribute to faster writing, reading, speaking, and better understanding of technical and scientific articles, reports, and lectures. They can save time and money by reducing the time and cost of writing, typing, editing, and composition resetting costs. They also reduce the space required for texts, tables, and diagrams. Therefore, they are very good tools to enhance any live and dynamic language. ThewordsoftheEnglishandotherEuropeanlanguagescompriseafew special characters implying distinct technical meanings, such as l for wavelength or 4 for phase. In these languages, abbreviations play a similar role, but each of them implies the meaning of a “phrase” instead ofa“word.”Thus,theycanbeconsideredastheelementsofthatlanguage and are treated like the original words. Sometimes, the short form of a phraseismorecommonthanthatofitsoriginalformbecausetheyarevery proper and effective tools for communication. In most languages, especially in English, coining abbreviations is a common practice and most of the high-frequency compound terms are used in short forms. For this reason, the abbreviations of a language are considered as “a language within that language”, and from the socio-linguistic point viii & of view, they are comparable with a “dialect.” Therefore, utilization of abbreviations is inevitable and it is a wise decision to take action for their standardization. Without standard rules and principles, there will be many debates and discussions about writing style, when engineers are writing their manuscripts. To avoid these debates, it is recommended that writing principles and rules are formulated and standardized. With this in mind, I have followed the principles and rules adopted by John Markus, the composer of “Electronics Dictionary” as described in the fourth edition and recommend them to be standardized for international application. This book is entitled as “Comprehensive Glossary of Telecom Abbreviations”, but since each branch of science listed below are somehow interrelated and intermingled with telecommunications engin- eering, I have also included the abbreviations of those branches. The abbreviations listed in this work have been compiled over years from intensive study of various resources. A glossary of abbreviations is a growing work and will never be perfect and fully comprehensive. Despite this, I have tried all my best to include a collection of over 16,200 entries from almost all the fields of telecommunications, satellite communications, electronics, computer, Internet, broadcasting, fiber optics, information technology (IT), ICT, live Internet chat, e-learning, e-commerce, remote sensing, cellular networks, avionics, Ham radio, radar, and military communications terms to satisfy the needs of engineers, technical writers, technicians, and university students. Particular attention is paid to the abbreviations used in ITU, IMO, Intelsat, Inmarsat, and APSCC documents. Telecommunication magazines are not forgotten and many titles and volumes have been searched. You may also find many abbreviations used in contracts and financial documents. The most famous telecom companies and operators are included. A larger number of abbreviations made and used by the specialized institutions and standard organizations such as IEEE, ETSI, IETF, and ISO are also included. New technologies and systems such as ISDN, ATM, TMN, SONET, SDH, DECT, and Bluetooth are of special importance in this glossary. All entries are listed in alphabetical order. Where two or more entries differ only in capitalization or punctuation, the forms comprised of uppercased (capital) letters will follow the lowercased forms, and those having dots, slashes, or spaces precede the capital forms. Entries commencing with numbers are collected before all others. Where more than one phrase stand for a given abbreviation, both or all phrases are mentioned and marked by numbers. Entries of Greek symbols or letters are also alphabetized as if they were spelt out. Following the phrases, the relevant field of each entry has also been shown in parentheses or & ix brackets to clarify or limit the usage field. If an entry does not fall into a specific category, the name of the company which coined that abbrevi- ation is mentioned in parentheses. Ali Akbar Arabi
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