 |
| |||
| up-hook; off hook | |||
| подключённый к линии: 48 phrases in 10 subjects |
| Communications | 1 |
| Computer networks | 1 |
| Electronics | 2 |
| Information security and data protection | 1 |
| Information technology | 1 |
| Mass media | 31 |
| Oil and gas | 1 |
| Security systems | 4 |
| Telecommunications | 5 |
| Telephony | 1 |