Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; Direct Dialling In (DDI) supplementary service; Part 1: Protocol specification [ITU-T Recommendation Q.2951, clause 1 (1995), modified]
STANDARD published on 31.7.1997
Designation standards: ETSI ETS 300661-1-ed.1
Publication date standards: 31.7.1997
The number of pages: 7
Approximate weight : 21 g (0.05 lbs)
Country: European technical standard
Category: Technical standards ETSI