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Integrated Services Digital Network (ISDN); User-network interface data link layer specification; Application of CCITT Recommendations Q.920/I.440 and Q.921/I.441
STANDARD published on 27.9.1991
Designation standards: ETSI ETS 300125-ed.1
Publication date standards: 27.9.1991
SKU: NS-312157
The number of pages: 153
Approximate weight : 490 g (1.08 lbs)
Country: European technical standard
Category: Technical standards ETSI
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