 |
| |||
| head office; phone switch; exchange; headquarters | |||
| substation | |||
| switching unit | |||
| |||
| switching entity; switching office | |||
| centrala: 62 phrases in 10 subjects |
| Communications | 5 |
| Construction | 13 |
| General | 1 |
| Hydraulic engineering | 2 |
| Microsoft | 4 |
| Oil / petroleum | 1 |
| Politics | 2 |
| Telecommunications | 11 |
| Telegraphy | 9 |
| Telephony | 14 |