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LESSON 1 The Progressive Push 1

Evolution of Telecommunications Networks 1

The Global Village 24

What Is a Communication Network? 27

语法概述 29

LESSON 2 Telecommunication Networks 34

Types of Communication Networks 34

Network Protocol Architecture 59

Standards Activities 66

名词 67

LESSON 3 Telecommunication Switching 73

Switching Techniques 73

Advances In Switching Techniques 88

Photonic Switching 94

限定词 98

LESSON 4 Satellite Communications 102

Satellite Communication Systems 102

The Development of Satellite Communications 122

Very Small Aperture Terminal 129

形容词 副词 133

LESSON 5 Mobile Communication 138

The Radio Communication system 138

Cellular Systems and Cellular Radio Telephone Terminals 153

Cordless Systems and Cordless Terminals 159

代词 162

LESSON 6 Optical Fiber Communication 168

Advantages of Optical Fiber Communication 168

The general System of Optical Fiber Communication 187

SONET/SDH Benefits and Deployment 193

动词 199

LESSON 7 Access Network 205

Evolution of the Access Network 205

Opportunities for Advanced Optical Technology in Access Networks 229

Decade of the Access Network? 238

被动语态 243

LESSON 8 ISDN 248

Basic Concepts of ISDN 248

Evolution Toward Broadband ISDN 268

Benefits 277

虚拟语气 280

LESSON 9 Intelligent Network 284

Intelligent Network Concept 284

What the Intelligent Network Really Is 297

The Evolution of Intelligent Networks 305

非谓语动词 307

LESSON 10 Multimedia 313

CCITT Classification 329

Applications in Technical Traiuing and Computer-Assisted Maintenance 333

介词 336

LESSON 11 The History of Computers 340

Technological Evolution of Cornputers 340

Microcomputer History 356

People and Their Contributions 360

名词从句 364

LESSON 12 Computer System Components 367

Computer System Organization 367

The Hierarchy and types of Memory 381

Classification of Computers 387

定语从句 391

LESSON 13 How does a Computer Work? 395

Instructions Processing 395

RISC vs. CISC：Instruction Set Strategies 413

Operating Systems 420

状语从句 423

LESSON 14 Computer Interfacing 428

An Overview of Data Acquisition & Control 428

Some Interface Technology of PCs 447

External and Internal Bus Data Acquisition 456

主谓一致 459

LESSON 15 Computers And Communications 463

Computer Networks 463

Communication Hardware 479

The Internet 485

倒装句 491

LESSON 16 Computer Application——Office Automation 495

Computers in the Office 495

Office Automation——Integration of Technologies 512

The Office of 1975 and 1990 518

科技英语的特点 522

练习答案 525

词汇表 530

词组表 570