ATM device and shaping method

摘要

In an ATM device comprising a switch core 11, a port shaping unit 25 is arranged within the switch core 11 to carry out a port shaping operation. The port shaping unit 25 controls reading timing of each cell stored in a shared buffer 10. Therefore, a delay to absorb the CDV is decided by the reading timing and the port shaping operation is achieved within the ATM device without attaching any additional memories to the ATM device.