Integrated Services Digital Network (ISDN). Call Hold (HOLD) supplementary service. Digital Subscriber Signalling System No. one (DSS1) protocol. Part 1: Protocol specification
STANDARD published on 1.7.2002
Designation standards: STN EN 300141-1-V1.2.4
Classification mark: 870141
Catalog number: 87853
Publication date standards: 1.7.2002
The number of pages: 21
Approximate weight : 63 g (0.14 lbs)
Country: Slovak technical standard
Category: Technical standards STN