Integrated Services Digital Network (ISDN). Call Waiting (CW) supplementary service. Digital Subscriber Signalling System No. one (DSS1) protocol. Part 1: Protocol specification
STANDARD published on 1.4.2002
Designation standards: STN EN 300058-1-V1.2.4
Classification mark: 870058
Catalog number: 19892
Publication date standards: 1.4.2002
The number of pages: 17
Approximate weight : 51 g (0.11 lbs)
Country: Slovak technical standard
Category: Technical standards STN