標準號：BS ISO/IEC 10588-1993
中文標準名稱：信息技術.使用X.25包層協議及X.21/X.21二度提供開放式系統互連(OSI)連接方式網絡服務
英文標準名稱：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
標準類型：L78
發布日期：1993/8/15 12:00:00
實施日期：1993/8/15 12:00:00
中國標準分類號：L78
國際標準分類號：33.080;35.100.01
適用范圍：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 access. The X.25 PLP operates either in the DTE/DTE or DTE/DCE mode. This provision is achieved by specifying the mapping of the CONS primitives and parameters to and from the elements of the protocols used (i.e. X.25 PLP and X.21).