
Private Telecommunication Network (PTN); Inter-exchange signalling protocol; Circuit mode basic services
NORM herausgegeben am 18.12.1992
    
        Designation standards: ETSI ETS 300172-ed.1
                
                
                
               
                Publication date standards:  18.12.1992
        The number of pages: 149
Approximate weight : 478 g (1.05 lbs)
        Country:          European technical standard
        Kategorie: Technische Normen ETSI