The so-called carrier Ethernet is that keeping the original Ethernet frame structure unchanged, realize the telecommunications network management through the expansion of the Ethernet frame header and the layer two Signaling command. 所谓电信级以太网,即在保留传统以太网的帧结构的基础上,通过扩展帧头和引入二层信令,在以太网上实现与电信网类似的可管理性和高可靠性。