Patent ID: 7215676

Claim:
A method of converting AAL2 cells in an ATM network system, the method comprising: (a) receiving one or mote AAL2 cells that include a Common Part Sublayer (CPS) packet including one of N data subsets of an original user data set; (b) extracting said CPS packet from said one or mote AAL2 cells received in (a); (c) generating an AAL5 cell by adding an ATM header to said data subset included in said CPS packet; (d) storing intermediate CRC and length values of said data subset included in said AAL5 cell generated in (c) in a memory without storing the data subset of the generated cell; and (e) repeating (a) to (d) until said CPS packet extracted in (b) is a final CPS packet that includes an Nth data subset having its size of n bytes.