| |||
interexchange signalling system | |||
signalling system (ITU-T (CCITT) Rec. Q.700 ff, FTZ RL 1TR6) | |||
signalling system; common channel signaling system |
Zeichengabesystem : 9 phrases in 5 subjects |
Communications | 4 |
Electronics | 2 |
General | 1 |
Information technology | 1 |
Telecommunications | 1 |