Integrated Services Digital Network (ISDN). Closed User Group (CUG) supplementary service. Digital Subscriber Signalling System No. one (DSS1) protocol. Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the user
STANDARD published on 1.7.2002
Designation standards: STN EN 300138-4-V1.3.4
Classification mark: 870138
Catalog number: 87850
Publication date standards: 1.7.2002
The number of pages: 191
Approximate weight : 604 g (1.33 lbs)
Country: Slovak technical standard
Category: Technical standards STN