Integrated Services Digital Network (ISDN); Closed User Group (CUG) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 1: Protocol specification
NORMA vydaná dňa 15.5.1997
Designation standards: ETSI ETS 300138-1-ed.2
Publication date standards: 15.5.1997
The number of pages: 31
Approximate weight : 93 g (0.21 lbs)
Country: European technical standard
Kategória: Technické normy ETSI