Information technology. Use of X.25 packet layer protocol in conjunction with X.21/X.21 bis to provide the OSI connection-mode network service Ingestion-build-266356 maintaining and improving data security

maintaining and improving data security

The scope of the street gazetteer has been clarified

• Circular axial run-out tolerance

This is a revision of BS EN 10025-6:2004+A1:2009

3 Description of categories

Information technology. Use of X.25 packet layer protocol in conjunction with X.21/X.21 bis to provide the OSI connection-mode network service Ingestion-build-266356 maintaining and improving data security1 Scope This CCITT Recommendation International Standard is applicable to the environments where Recommendation X. 21 or X. 21 bis is used and where the X. 25 packet layer protocol (PLP), as standardized in ISO IEC 8208, is operated during the X. 21 X. 21 bis data phase to provide the OSI Connection mode Network Service (CONS). These environments include a CSDN and an ISDN Terminal Adaptor complying with Recommendation X. 30 which provides an X. 21