Private Telecommunication Network (PTN); Inter-exchange signalling protocol Supplementary service interactions; ECMA-QSIG-IA
STANDARD published on 26.9.1995
Designation standards: ETSI ETS 300427-ed.1
Note: WITHDRAWN
Publication date standards: 26.9.1995
The number of pages: 47
Approximate weight : 141 g (0.31 lbs)
Country: European technical standard
Category: Technical standards ETSI