FOREWORD
1 General
    1.1 Scope and object
    1.2 Normative references
    1.3 Definitions
2 Modulation
    2.1 Purpose
    2.2 The Spread Frequency Shift Keying (S-FSK)
          principle
    2.3 The spreading
    2.4 Performance tests
          2.4.1 Purpose
          2.4.2 White noise BER tests
          2.4.3 Narrowband interferer BER tests
          2.4.4 Impulsive noise BER tests
3 Physical layer
    3.1 Purpose
    3.2 Transmission method
          3.2.1 Coding
          3.2.2 Bit timing
          3.2.3 Frame timing
          3.2.4 Slot timing
    3.3 Packet encapsulation
          3.3.1 Purpose
          3.3.2 Preamble
          3.3.3 Start subframe delimiter
          3.3.4 Pause
    3.4 Physical layer services definitions
          3.4.1 General description
          3.4.2 PHY_Data.request
          3.4.3 PHY_Data.confirm
          3.4.4 PHY_Data.indication
4 Medium access control layer (MAC)
    4.1 MAC service specification
          4.1.1 Purpose
          4.1.2 Overview of the services
          4.1.3 MA_Data.request
          4.1.4 MA_Data.confirm
          4.1.5 MA_Data.indication
    4.2 MAC frame formats
          4.2.1 MAC frame formats
          4.2.2 Elements of the MAC frame
          4.2.3 Invalid MAC frame
    4.3 Medium access control method
          4.3.1 Functional model
          4.3.2 Transmission description
          4.3.3 Reception description
          4.3.4 Formal specification
          4.3.5 Medium access state table
          4.3.6 Transition table description
Annexes
A Description of error values
B Short frame overlaying