1.4.3 Large Business Telephone Systems 14
1.4.4 Corporate Multisite Telephone Systems 14
1.4.5 Data Communications 15
1.4.6 Public Telecommunications Applications 15
1.4.7 Radio Local Loop Applications 16
1.4.8 Multimode Cordless and Cellular Systems 16
1.5 A Brief History 17
1.5.1 European Cordless Telephones in 1987 17
1.5.2 The Birth of DECT 17
1.5.3 DECT as an Official European Standard 18
1.5.4 DECT Becomes PWT in the United States 19
1.5.5 The Developing Market 19
2 The Technical Principles 21
2.1 A Cordless Framework 21
2.1.1 The Role of DECT or PWT in a Cordless System 22
2.1.2 The Coexistence Requirement 24
2.1.3 An Opportunity for Interoperation 25
2.1.4 Interoperation for Certain Applications 26
2.1.5 Regulation of Interoperation 26
2.2 The Radio Interface 27
2.2.1 Introduction to the Radio Interface 27
2.2.2 Outline of the Basic Rationale 30
2.2.3 Radio Access Method 31
2.2.4 Channel Bit Rate 31
2.2.5 Speech Coding Type and Rate 33
2.2.6 Duplexing 34
2.2.7 Frame Rate and Packet Size 36
2.2.8 Channel Coding and Signaling 37
2.2.9 Dynamic Channel Allocation 39
2.3 Basic System Operation 41
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Personal Wireless Communication With DECT and PWT
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