Pseudo-Wire Emulation Edge-to-Edge(PWE3) offers the mechanism of transmitting traditional L1 and L2 layers network of services at PSN.

• 边缘到边缘的伪线仿真（PWE3）是在PSN上提供传统L1和L2层网络业务的机制，PWE3的发展目标是形成统一的多业务网络平台。