Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control; Part 1: Protocol specification [ITU-T Recommendation Q.931 (1993), modified]
NORM herausgegeben am 24.11.1999
Designation standards: ETSI EN 300403-1-V1.3.2
Publication date standards: 24.11.1999
The number of pages: 78
Approximate weight : 234 g (0.52 lbs)
Country: European technical standard
Kategorie: Technische Normen ETSI