|
3304001
|
Telecommunication systems in general
|
|
3304020
|
Transmission systems
|
|
3304030
|
Switching and signalling systems
|
|
3304035
|
Telephone networks
|
|
3304040
|
Data communication networks
|
|
3304050
|
Lines,connections and circuits
|
|
3304060
|
Powerline telecommunications
|
|
3304099
|
Other equipment for telecommunication systems
|
