| |||
| digital switching systems | |||
|
digitale Vermittlungssysteme : 3 phrases in 2 subjects |
| Communications | 2 |
| Telecommunications | 1 |
| |||
| digital switching systems | |||
|
digitale Vermittlungssysteme : 3 phrases in 2 subjects |
| Communications | 2 |
| Telecommunications | 1 |