Integrated Services Digital Network (ISDN). Closed User Group (CUG) supplementary service. Digital Subscriber Signalling System No. one (DSS1) protocol. Part 1: Protocol specification
STANDARD published on 1.4.2002
Designation standards: STN EN 300138-1-V1.3.4
Classification mark: 870138
Catalog number: 19933
Publication date standards: 1.4.2002
The number of pages: 31
Approximate weight : 93 g (0.21 lbs)
Country: Slovak technical standard
Category: Technical standards STN