 |
| |||
| импульсный набор (ssn) | |||
|
pulse dial : 31 phrases in 12 subjects |
| Aviation | 1 |
| Electronics | 4 |
| Information security and data protection | 1 |
| Information technology | 1 |
| Makarov | 3 |
| Mass media | 1 |
| Meteorology | 1 |
| Security systems | 1 |
| Space | 1 |
| Technology | 2 |
| Telecommunications | 13 |
| Telephony | 2 |