This paper expounds the application of a series of new services that NAS can provide: trunk group, multiple link binding, VPDN.
阐述了接入服务器所能提供的中继合群、多链路捆绑、VPDN(拨号虚拟专用网)、回叫功能、端口批发、IP电话等一系列业务新功能的应用。
