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 15.6.1996
Designation standards: ETSI ETS 300403-1-ed.1/Cor.1
Publication date standards: 15.6.1996
The number of pages: 6
Approximate weight : 18 g (0.04 lbs)
Country: European technical standard
Category: Technical standards ETSI