| 61100 | Cable service |
| 61100 | Data network management and support services (wired telecommunications) |
| 61100 | Data transmission (via cables, broadcasting, relay or satellite) |
| 61100 | Dedicated business telephone network services (wired telecommunications) |
| 61100 | Electronic mail services (wired telecommunications) |
| 61100 | Hull telephone service |
| 61100 | Image transmission via cables, broadcasting, relay or satellite |
| 61100 | Shared business telephone network services (wired telecommunications) |
| 61100 | Sound transmission via cables, broadcasting, relay or satellite |
| 61100 | Telecommunication network maintenance (wired telecommunications) |
| 61100 | Teleconferencing services (wired telecommunications) |
| 61100 | Telegram service |
| 61100 | Telegraph communication |
| 61100 | Telephone communication (wired telecommunications) |
| 61100 | Telephone exchange |
| 61100 | Telephone service (wired telecommunications) |
| 61100 | Telephone service operation of 0898 numbers |
| 61100 | Teletext and other electronic message and information services (wired telecommunications) |
| 61100 | Telex service (wired telecommunications) |
| 61100 | |