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Integrated Services Digital Network (ISDN). Direct Dialling In (DDI) supplementary service. Service description
STANDARD published on 1.8.1995
Designation standards: ČSN ETS 300062
Classification mark: 873507
Catalog number: 18096
Publication date standards: 1.8.1995
SKU: NS-170721
The number of pages: 2
Approximate weight : 6 g (0.01 lbs)
Country: Czech technical standard
Category: Technical standards ČSN
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