Patent ID: 6996109

Claim:
An ATM (Asynchronous Transfer Mode) cell transmitting device of an ATM switching system comprising: a time slot input unit for switching a plurality of time slots; a packet processing unit for forming a CPS (Common Part Sublayer) packet using data corresponding to the switched time slots; a CAM (Contents Addressable Memory) for receiving header information of the CPS packet and outputting an ATM buffer number; an ATM cell transmitting unit for storing the data of the CPS packet outputted from the packet processing unit according to the ATM buffer number outputted from the CAM, to form an ATM cell; and a controlling unit for performing a general controlling operation, wherein the CAM allocates a same ATM buffer number to include different time slots and CIDs (Channel Identifiers) for identifying a plurality of users in a single VC (Virtual Channel) in the same ATM buffer number.