This standard was last reviewed and confirmed in 1999. Therefore this version remains current.
Applies to environments including a CSDN and an ISDN terminal adaptor complying with recommendation X.30 which provides an X.21 access. Provision is achieved by specifying the mapping of the CONS primitives and parameters to and from the elements of the protocols used (X.25 PLP and X.21).
Status : PublishedPublication date : 1993-05
Edition : 1Number of pages : 11
Technical Committee:Telecommunications and information exchange between systems
Buy this standard
A standard is reviewed every 5 years
Revisions / Corrigenda