█ _ 0 حصريا كتاب ❞ Fundamentals of Telecommunications ❝ 2025 Telecommunications: Telecommunications Fundamentals Roger L Freeman Copyright 1999 Freeman Published by John Wiley & Sons, Inc ISBNs: 471 29699 6 (Hardback); 22416 2 (Electronic) CONTENTS Preface xxi Chapter 1 Introductory Concepts 1 1 What Is Telecommunication? Telecommunication Will Touch Everybody 3 Topics in 2 1 End Users, Nodes, and Connectivities Telephone Numbering Routing 6 1 Use Tandem Switches a Local Area Connectivity 7 1 4 Busy Hour Grade Service 5 Simplex, Half Duplex, Full Duplex 9 1 One Way Two Circuits 7 Network Topologies 10 1 8 Variations Traffic Flow 14 1 Quality 15 1 Standardization 16 1 Organization the PSTN United States 17 1 Points Presence 17 Review Exercises 18 References 19 Chapter Signals Convey Intelligence 21 2 Objective Everyday Life Basic Electricity for Communications 22 2 Early Sources Electrical Current Telegraph: An Form Long Distance 23 2 Frequency? 25 2 30 2 Introduction to Transmission Modulation 31 2 Binary Digital 33 viii CONTENTS 2 Transporting 34 2 Wire Pair Coaxial Cable 37 2 Fiber Optic 38 2 Radio 38 Review 40 References 41 Chapter Impairments 43 3 Service: Voice, Data, Image Signal Noise Ratio Voice 44 3 Data 46 3 Video (Television) 47 3 Three How They Affect the End User Amplitude Distortion Phase 48 3 50 3 Level 53 3 Typical Levels Echo Singing 54 Review 54 References 55 Chapter Switching الكتب التقنية والحاسوبية العامة مجاناً PDF اونلاين ركن خاص بكتب مجانيه للتحميل General ويوجد بيه مجموعة كتب مجالات الانترنت والبرامج المكتبية وتطبيقات ولغات البرمجة شرح لموضوعات تقنية باللغة العربية ومجموعة كبيرة من لغات خاصة ومجال الحاسوب بشكل عام