Integrated Services Digital Network (ISDN). Generic keypad protocol for the support of supplementary services. Digital Subscriber Signalling System No. one (DSS1) protocol. Part 1: Protocol specification
STANDARD published on 1.7.2002
Designation standards: STN EN 300122-1-V1.2.4
Classification mark: 870122
Catalog number: 87843
Publication date standards: 1.7.2002
The number of pages: 11
Approximate weight : 33 g (0.07 lbs)
Country: Slovak technical standard
Category: Technical standards STN