ITU X.222:1995
ITU X.222:1995 Use Of X.25 Lapb-compatible Data Link Procedures To Provide The Osi Connection-mode Data Link Service Establishes a method for providing the OSI Connection-mode Data Link Service (CO-DLS) through the use of the X.25 LAPB-compatible DTE data link procedures as described in X.25 and X.75.