hi mark

actually i m doing bachelors in computer science from karachi university pakistan and i m a beginner and in first year so i dont knoe abt aal5 can u plzz tell me what iz it  thanxxx

ragards

furqi

The ATM Adaptation Layer (AAL) is where segmentation and reassembly is carried out. This is the layer on top of the transmission layer.

AAL 0 is called "native" ATM

AAL 1 constant bit rate (circuit emulation) for voice and video

AAL 2 transmission of variable bit rate streams with well defined time constraints between sender and receiver

AAL 3/4 variable bit rate without time constraints for packet data

AAL 5 is an alternate standard for packet data that is a simplified version of AAL3/4 (no multiplexing of cells)

SAAL signalling AAL