| Question | Title | 
        
     | 1/15 | Access network transport | 
     
        
       | 2/15 | Optical systems for access networks | 
        
        
            | 3/15 | Support for Recommendations Specifying Systems Based on 
            ISDN Physical Layers. Deleted  TSB Circular 211 | 
        
        
            | 4/15 | Transceivers for customer access and in-premises 
            phone line networking systems on metallic pairs | 
        
        
            | 5/15 | Compression and classification in signal processing 
            network equipment | 
        
        
            | 6/15 | Speech enhancement in signal processing 
            network equipment | 
        
        
            | 7/15 | Voice gateway equipment | 
        
        
            | 8/15 | Interaction aspects of signal processing network equipment | 
        
        
            | 9/15 | Transport equipment and network protection/restoration | 
        
        
            | 10/15 | ATM and Internet Protocol (IP) equipment.
              Deleted  TSB Circular 211 | 
        
        
            | 11/15 | Signal structures, interfaces and interworking for 
            transport networks | 
        
        
            | 12/15 | Technology Specific Transport Network Architectures | 
        
        
            | 13/15 | Network Synchronization and Time Distribution Performance | 
        
        
            | 14/15 | Network management for transport systems and equipment | 
        
        
            | 15/15 | Characteristics and test methods of optical fibres and cables | 
        
        
            | 16/15 | Characteristics of optical systems for terrestrial transport networks | 
        
        
            | 17/15 | Characteristics of optical components and subsystems | 
        
        
            | 18/15 | Characteristics of optical fiber submarine cable systems | 
        
        
            | 19/15 | General characteristics of optical transport networks | 
        
        
            | 20/15 | Optical fibres for broadband services to and in buildings and homes |