means any system of electronic communications facilities (excluding subscriber equipment), including without limitation—
| a) | satellite systems; |
| b) | fixed systems (circuit- and packet-switched); |
| c) | mobile systems; |
| d) | fibre optic cables (undersea and land-based); |
| e) | electricity cable systems (to the extent used for electronic communications services); and |
| f) | other transmission systems, used for conveyance of electronic communications; |