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 30.4.1998
Designation standards: ETSI EN 300403-1-V1.2.2
Publication date standards: 30.4.1998
The number of pages: 80
Approximate weight : 240 g (0.53 lbs)
Country: European technical standard
Kategorie: Technische Normen ETSI