Table of Contents

 1     Scope          
 2     References               
 3     Definitions 
        3.1     Terms defined elsewhere        
        3.2     Terms defined in this Recommendation            
 4     Abbreviations and acronyms             
 5     Interaction aspects of signal processing network equipment              
        5.1     Interaction aspects of echo suppressors           
        5.2     Interaction aspects of echo cancellers
        5.3     Interaction aspects of voice enhancement devices (VEDs)        
        5.4     Interaction aspects of automatic level control 
        5.5     Interaction aspects of circuit multiplication equipment               
        5.6     Interaction aspects of acoustic echo controllers             
        5.7     Interaction aspects of voice gateways and IP-based circuit multiplication equipment   
        5.8     Delay introduced by signal processing network functions          
        5.9     Some considerations on the preferred locations of voice enhancement SPNE 
 6     Conformance and interoperability  
Appendix I – Tandem-free operation (TFO)    
        I.1                   Introduction      
        I.2                   Essence of the current standards            
Bibliography