AAL 2
When transmitting many low/variable bit rate
signals between two end-points using ATM, AAL 2 provides
low packetization delay and high bandwidth efficiency at the same
time
AAL 1 used
=> low delay means low
efficiency:
payload
h
payload
h
payload
h
payload
h
payload
h
payload
h
AAL 2 used
=> multiplexing of different
signals into ATM cell payloads in a flexible manner