Integrated Services Digital Network (ISDN). Public Switched Telephone Network (PSTN). Premium Rate (PRM) service. Service description
STANDARD published on 1.4.2002
Designation standards: STN ETS 300712
Classification mark: 870712
Catalog number: 20002
Publication date standards: 1.4.2002
Approximate weight : 300 g (0.66 lbs)
Country: Slovak technical standard
Category: Technical standards STN