| Classification of Economic Activities rev. 2 (CZ-NACE) - level 3 - Group | 611 | Wired telecommunications activities | 
                
                  
                    | Classification of Economic Activities rev. 2 (CZ-NACE) - level 5 - Sub-class | 61101 | Provision of voice services over wired telecommunications network | 
                
                  
                    | Classification of Economic Activities rev. 2 (CZ-NACE) - level 5 - Sub-class | 61102 | Renting of wired telecommunications network | 
                
                  
                    | Classification of Economic Activities rev. 2 (CZ-NACE) - level 5 - Sub-class | 61103 | Data transmission over wired telecommunications network | 
                
                  
                    | Classification of Economic Activities rev. 2 (CZ-NACE) - level 5 - Sub-class | 61104 | Provision of internet access over wired telecommunications network | 
                
                  
                    | Classification of Economic Activities rev. 2 (CZ-NACE) - level 5 - Sub-class | 61109 | Other activities related to wired telecommunications network |