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 30.6.1998
Designation standards: ETSI EN 300141-1-V1.2.4
Publication date standards: 30.6.1998
The number of pages: 21
Approximate weight : 63 g (0.14 lbs)
Country: European technical standard
Kategorie: Technické normy ETSI