FOREWORD
1 General
    1.1 Scope and object
    1.2 Normative references
    1.3 Acronyms
2 The lower layer profile structure
    2.1 MAC sublayer
    2.2 PLS sublayer
    2.3 MAU
3 MAC sublayer
    3.1 Overview
    3.2 Classes of service
          3.2.1 Class of service in connection oriented
                  (CO) mode
          3.2.2 Class of service in connectionless (CL) mode
    3.3 MAC services
    3.4 MAC to LLC interfaces
          3.4.1 MA_Data.request
                  3.4.1.1 Function
                  3.4.1.2 Structure
                  3.4.1.3 Use
          3.4.2 MA_Data.indication
                  3.4.2.1 Function
                  3.4.2.2 Structure
                  3.4.2.3 Use
          3.4.3 MA_Data.confirm
                  3.4.3.1 Function
                  3.4.3.2 Structure
                  3.4.3.3 Use
    3.5 MAC to Physical layer interfaces
    3.6 MAC to Layer Management Interface
          3.6.1 Function
          3.6.2 Structure
          3.6.3 Use
    3.7 MAC frame format
    3.8 MAC frame
    3.9 Elements of the MAC frame
          3.9.1 Preamble
          3.9.2 Flag
          3.9.3 Address
          3.9.4 Control
                  3.9.4.1 Repetition Style 1
                  3.9.4.2 Repetition Style 2
          3.9.5 Repetition
          3.9.6 Information
          3.9.7 Frame Checking Sequence (FCS)
    3.10 MAC invalid frame
    3.11 MAC procedures
          3.11.1 MACph procedures
                  3.11.1.1 Transmit a frame
                  3.11.1.2 Receive a frame
                  3.11.1.3 Detection of the AC phase delay
          3.11.2 MACre procedures
          3.11.3 MAC repetition procedures Style 1
                  3.11.3.1 Service_Class = 1
                  3.11.3.2 Service_Class = 2
          3.11.4 MAC repetition procedures Style 2
    3.12 Repetition management
    3.13 MAC state transition
          3.13.1 State transition table for the operation
                  Style 1
          3.13.2 State description
          3.13.3 Event description
          3.13.4 Actions description
          3.13.5 Notation used in the transition table
4 PLS sublayer
    4.1 PLS service specification
          4.1.1 General description of the service
          4.1.2 Detailed specification of the service
                  4.1.2.1 Ph_Data.request
                  4.1.2.2 Ph_Data.confirm
                  4.1.2.3 Ph_Data.indication
                  4.1.2.4 Ph_ZC.indication
    4.2 Frame structure and synchronization
          4.2.1 Frame structure
          4.2.2 Frame synchronization
    4.3 MI characteristics
          4.3.1 General description of the characteristics
          4.3.2 Detailed description of the signals
                  4.3.2.1 Transmit Data (TD)
                  4.3.2.2 Receive Data (RD)
                  4.3.2.3 Mode Control (MC)
                  4.3.2.4 Bit Clock (BC)
                  4.3.2.5 Zero Crossing (ZC)
    4.4 Description of the procedures
          4.4.1 PLS component state descriptions
          4.4.2 PLS component event descriptions
          4.4.3 PLS component action descriptions
5 MAU
    5.1 General
    5.2 General characteristics
          5.2.1 Modulation rate
          5.2.2 Frequency range
          5.2.3 Optional interchange circuits
    5.3 MV modem characteristics
          5.3.1 Nominal input-output impedance
          5.3.2 Load impedance
          5.3.3 Nominal signal output power
          5.3.4 Nominal signal frequency band (BN)
          5.3.5 Transmission mask
          5.3.6 Carrier stabilization
          5.3.7 Input sensitivity
          5.3.8 Input dynamic range
          5.3.9 Bit error rate
          5.3.10 Recovered clock jitter
    5.4 LV modem characteristics
          5.4.1 Frequency bands
          5.4.2 Input-output impedance
          5.4.3 Load impedance
          5.4.4 Transmission mask
          5.4.5 Signal frequency stabilization
          5.4.6 Input sensitivity
          5.4.7 Input dynamic range
          5.4.8 Bit error rate
          5.4.9 Recovered clock jitter