As automatic switched optical networks (ASONs) have been developed and deployed, it is the evident that ASON is open to users and provide dynamic bandwidth for users using the UNI interfaces.

• 随着自动交换光网络（ASON）开发和部署，很明显，自动交换光网络的服务能够向用户开放，并且能够通过用户网络接口UNI为用户提供动态带宽服务。