ATM Adaptation Layer 5
(AAL5)
•Efficient LAN emulation
•Control info in
the last cell
Figure 20.14
 
CS-PDU
CS   trailer
       SAR-PDU
   - -  -  - -
        
ATM Layer
<65535 Bytes
Bytes
PAD
UU
CPI
Length
FCS
1
1
4
2
0-47
Information from upper layer
48 Bytes
Payload
48 Bytes
Payload
40 Bytes
Payload
8 Bytes
CS Trailer
Cell
Header
48 bytes
Payload
48 Bytes
Payload
Cell
Header
48 Bytes
Payload