When traffic from a TDM system is transported over a packet-switched network like Carrier Ethernet, what is this service referred to?

When traffic from a Time Division Multiplexing (TDM) system is sent over a packet-switched network such as Carrier Ethernet, the service used to achieve this is known as Circuit Emulation Service (CES). This service is specifically designed to emulate the circuit-switched nature of traditional TDM networks within a packet-switched architecture.

Circuit Emulation Service allows the encapsulation of TDM traffic into packet formats, enabling it to traverse a packet-switched network while maintaining the timing and timing-related characteristics of the original TDM transmissions. This is essential for ensuring that applications relying on TDM, such as voice and video services, can function correctly without disruption in a modern Ethernet-based environment.

In contrast, other options like Packet Service, Time Division Service, and Data Transfer Service do not specifically address the requirements and functionalities needed to preserve TDM traffic characteristics within the packet-switched domain. They lack the specific capability to emulate circuit-switched behavior, which is crucial for reliable performance of TDM traffic over Ethernet networks.