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-79769 3 Measurement points

3 Measurement points

for the determination of the degree of aerobic biodegradability of plastic materials

Mechanical design

6 Overpressure test

Guide to the accommodation and operating environment for Information Technology (IT) equipment

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-79769 3 Measurement points1 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