 |
tonalité d'encombrement
| de lignes
| tonalité d'encombrement | |
| el. | ATB signal; all trunks busy signal; channel-busy tone; congestion tone; reorder signal |
| de ligne | |
| el.tract. | line... |
| |||
| ATB signal; all trunks busy signal; channel-busy tone; congestion tone; reorder signal | |||
| no circuit signal | |||
| tonalité d'encombrement: 2 phrases in 1 subject |
| Telecommunications | 2 |