Integrated Services Digital Network (ISDN) - Call Hold (HOLD) supplementary service - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 1: Protocol specification
NORMA vydána dne 1.9.1998
Designation standards: ÖNORM EN 300141-1-V1.2.4
Publication date standards: 1.9.1998
The number of pages: 22
Approximate weight : 66 g (0.15 lbs)
Country: Austrian technische Norm
Kategorie: Technické normy ÖNORM