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]
STANDARD published on 1.2.2000
Designation standards: ÖNORM EN 300403-1-V1.3.2
Publication date standards: 1.2.2000
The number of pages: 419
Approximate weight : 1288 g (2.84 lbs)
Country: Austrian technische Norm
Category: Technical standards ÖNORM