4. Adaptation Layer AAL

HDLC to ATM AAL5 Adaptation Layer Interface

HDLA ATM AAL5

AAL1 CBR, R/T, raw video, voice
AAL2 VBR, R/T adaptively compressed video/voice
AAL3/4 data block-oriented, multiplexed, error check
AAL5 data block-oriented, error check, most common
AAL ? for emerging wireless communication

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Last revised: 27 October 1997, BJK