Circuit Emulation Service is a new technology which allows the transport of TDM service such as PDH (E1/T1/E3/T3) as well
as SONET/SDH circuit over a packet switched network. This paper presents the simulation based performance evaluation and QoS
guarantee of circuit emulation service over a peculiar metropolitan optical ring network.
Keywords Circuit Emulation Service - TDM - Quality of Service - Metropolitan Networks - Optical Ethernet Ring - Performance Evaluation