a ATM Cell Multiplying and Demultiplying Apparatus

摘要

PURPOSE: An apparatus for multiplexing and demultiplexing an ATM cell is provided to multiplex the ATM cell inputted from a physical layer board, add routing information to the multiplexed ATM cell to transmit the ATM cell to a switch network, and demultiplex the ATM cell received from the switch network. CONSTITUTION: A clock unit(40) receives a system clock to divide the received system clock to each composition block and generates a clock to be used in a line device. A control unit(50) performs various OAM(Operation Administration and Maintenance) functions and connection management functions and performs a communication with an upper control module through an internal message. A physical layer interface unit(10) multiplexes ATM cells from each line device by a round robin type and demultiplexes the ATM cells to output the demultiplexed ATM cell to a corresponding line device. A switch line matching unit(30) performs a block coding of a received internal cell and converts the coded internal cell into a serial data to transmit the serial data to a switch network, and performs a block coding of an internal cell received from a corresponding switch network and converts the coded internal cell into a serial data to transmit the serial data to the switch network, and converts the serial data received from the corresponding switch network into a parallel data and decodes the coded data. An ATM layer processing unit(20) classifies the ATM cell received from the physical layer interface unit(10) to provide the classified ATM cell to the switch line matching unit(30) or the control unit(50), and converts data from the switch line matching unit(30) or the control unit(50) into an ATM cell to transmit the ATM cell to the physical layer interface unit(10).