CONTENTS

 1 Scope 
2 References 
3 Definitions  
        3.1 Terms defined elsewhere    
        3.2     Terms defined in this Recommendation       
4 Abbreviations and acronyms        
5 Conventions and background       
        5.1 Conventions          
        5.2 Background           
6 Measurement modes        
7 Events to be monitored    
        7.1 Network events     
        7.2 Test signal structure events 
        7.3 Forward error correction (FEC) events      
        7.4 Events to be monitored at the OCh layer    
        7.5 Test signal structure to be used at OPUk layer        
8 Generator  
        8.1 Synchronization     
        8.2 Bit rates  
        8.3 Test signal structures          
        8.4 Digital signal outputs          
        8.5 Anomaly and defect addition on the output signal    
9 Receiver    
        9.1 Digital signal inputs 
        9.2 Test signal structures          
        9.3 Error performance measurement    
        9.4 Defects and anomalies indication    
        9.5 Events time stamping          
10 Forward error correction (FEC) performance verification functions          
       10.1 Parameters and results      
       10.2 Error generation    
       10.3 Measurement of the error correction and detection
11 Miscellaneous functions   
       11.1 FEC activation      
       11.2 Display  
       11.3 Access to overhead bytes 
       11.4 Output to external recording devices         
       11.5 Remote control port          
12 Operating conditions       
       12.1 Environmental conditions   
       12.2 Behaviour in case of power failure 
Annex A – Criteria for detecting anomalies and defects     
        A.1 Anomalies 
        A.2 Defects  
        A.3 Other information  
Annex B – List of test signal structures     
        B.1 Test signal structure TSS1 applied to all bytes of a CBR2G5          
        B.2 Test signal structure TSS2 applied to all bytes of a CBR10G          
        B.3 Test signal structure TSS3 applied to all bytes of a CBR40G          
        B.4 Test signal structure TSS4 applied to NULL/PRBS           
Annex C – Procedure of goodness of fit for Poisson distribution by χ² test     
       C.1 Introduction          
       C.2 Fundamental properties     
       C.3 Other properties   
Appendix I – Test of goodness of fit for Poisson distribution by χ² test     
        I.1 Introduction         
        I.2 Test of goodness of fit by χ² test   
        I.3 Theory of χ² test  
        I.4 Application of test of goodness of fit to Poisson distribution           
Bibliography