Integrated Services Digital Network (ISDN); Conference call, add-on (CONF) supplementary service; Service description
NORMA vydána dne 15.2.1998
Designation standards: ETSI ETS 300183-ed.1/Amd.1
Publication date standards: 15.2.1998
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: European technical standard
Kategorie: Technické normy ETSI