Mehrfrequenz
| Codewahl
| Mehrfrequenz | |
| transp. environ. el. | multi-frequency |
| Codewahl | |
| tel. | code signalling |
| |||
| multi-frequency | |||
|
Mehrfrequenz : 21 phrases in 6 subjects |
| Communications | 11 |
| Computers | 1 |
| Electronics | 5 |
| Information technology | 1 |
| Technology | 1 |
| Telephony | 2 |