ATMRcncltnAdvc
                Mandatory
                Hdr
                Mandatory
                PrtctdATMRcncltnAdvc
                Optional
                ATMRcncltnAdvc
                Optional
                SctyTrlr
                Optional
                CnttTp
                Mandatory
                AuthntcdData
                Mandatory
                Vrsn
                Optional
                Rcpt
                Repetition (1..n)
                MAC Algorithm
MACAlgo
                Mandatory
                Definition: Algorithm to compute message authentication code (MAC).
Type: AlgorithmIdentification15
Algo
                Mandatory
                Param
                Optional
                NcpsltdCntt
                Mandatory
                MAC
                Mandatory