The ATM adaptation layer (AAL) enhances the service provided by the ATM layer to support functions required by the
next higher layer. The AAL performs functions required by the user, control and management planes and supports the
mapping between the ATM
ITU-T I.363-1993 history
1996ITU-T I.363.1-1996 B-ISDN ATM Adaptation Layer Specification: Type 1 AAL Study Group 13; 47 pp
1993ITU-T I.363-1993 (WITHDRAWN) B-ISDN ATM Adaptation Layer (AAL) Specification - Integrated Services Digital Network (ISDN) - Overall Network Aspects and Functions Study Group XVIII; 100 pp; Addendum 1-April 1994