Integrated Services Digital Network (ISDN). User-network interface data link layer specifications. Application of CCITT Recommendations Q.920/I.440 and Q.921/I.441
STANDARD published on 1.3.1994
Designation standards: STN ETS 300125
Classification mark: 870125
Catalog number: 71384
Publication date standards: 1.3.1994
The number of pages: 153
Approximate weight : 490 g (1.08 lbs)
Country: Slovak technical standard
Category: Technical standards STN