| |||
| speed call; speed calling | |||
| direct call; direct mode | |||
| tie line (now DDV, q.v.) | |||
| hot line; direct line; direct-access call; automatic direct call | |||
|
Direktruf : 6 phrases in 3 subjects |
| Business | 1 |
| Communications | 4 |
| Telecommunications | 1 |
| |||
| speed call; speed calling | |||
| direct call; direct mode | |||
| tie line (now DDV, q.v.) | |||
| hot line; direct line; direct-access call; automatic direct call | |||
|
Direktruf : 6 phrases in 3 subjects |
| Business | 1 |
| Communications | 4 |
| Telecommunications | 1 |