Atm switching system

Details Atm switching system Atm switching system

H - Electricity

04

L

344/28

H04L 12/56 (2006.01)

Patent

CA 1318385

ABSTRACT OF THE DISCLOSURE In the ATM switching system, an ATM speech path is divided into a plurality of functional blocks. A routing function for distributing cells (packets) each of a fixed length to addresses outgoing lines and a logical multiplexing function are imparted to a switch, while other functions associated with a line typified by a phase synchronizing function and a flow control function are incorporated en bloc in ATM line terminating units and functions capable of being processed by hardware in common to the lines are assembled in a line common unit. The ATM line terminating unit physically terminates transmission lines and performs the processing relevant to header information of the cells each of a fixed length (ATM terminating processing) and includes a cell phase synchronizing circuit for matching the temporal positions of the cells among the lines and a flow control circuit for avoiding overload exceeding the load declared by subscriber terminal. The line common unit serves for processings of call control signals and the calls and includes a signal processing circuit and a control circuit. The switch performs cell multiplexing and switching and is constituted by a self-routing switch. -63-

606202

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