CONTENTS

 1     Scope
 2     References
 3     Definitions
 4     Symbols and abbreviations
 5     Field of application
 6     1+1 protection switching principles
 7     Transmitter operation
        7.1     Transmitter block diagram
        7.2     Synchronization process in the transmitter
        7.3     TC and PMD operation in the transmitter
 8     Receiver operation
        8.1     Receiver block diagram
        8.2     TC and PMD operation in the receiver
        8.3     Link synchronization process
        8.4     Block selection process