ATM controller and ATM communication control device

An ATM communication control device coupled to a terminal having a terminal memory and an ATM network, comprising:

• a buffer memory;
• an ATM connection management unit for registering an address of said terminal memory or said buffer memory as a reassemble buffer type to a reassemble management table for an ATM connection according to a traffic speed which is required for said ATM connection, said ATM connection being set upon receipt of a request for setting a connection from said terminal;
• a cell identifying unit identifying an ATM connection by a cell header of the received cell when a cell is received from said ATM network;
• and
• a cell receiving controller for transferring (forwarding) said received cell to said registered address if the address of the reassembled buffer is already registered in the reassemble management table for said identified ATM connection and, if the address of the reassemble buffer is not registered, for registering an address in said terminal memory or an address in said buffer memory as an address of the reassemble buffer in accordance with the reassemble buffer type registered in the reassemble management table for said identified ATM connection, and for transferring (forwarding) the received cell to said registered address.