Circuit emulation service

Circuit emulation service (CES) is a telecommunication technology used to send information over asynchronous data networks like ATM, Ethernet or MPLS, so that it is received error-free with constant delay, similar to a leased line.

Examples of channels needing constant delay include time-division multiplexed (TDM) services such as the traditional digital signal (DS) and the E-carrier circuits.

Circuit emulation service technology allows companies to easily migrate to packet-switched networks.

With CES, the legacy TDM and ATM services are supported with much more cost-effective infrastructures based on low-cost and highly available Ethernet devices.

This is a reverse mapping approach with regard to traditional solutions in which IP/ethernet services is carried in ATM or PDH/SDH protocols.