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| interexchange signalling system | |||
| signalling system (ITU-T (CCITT) Rec. Q.700 ff, FTZ RL 1TR6) | |||
| signalling system; common channel signaling system | |||
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Zeichengabesystem : 9 Phrasen in 5 Thematiken |
| Allgemeine Lexik | 1 |
| Elektronik | 2 |
| Informationstechnik | 1 |
| Kommunikation | 4 |
| Telekommunikation | 1 |