未来宽带接入网的VB5接口

VB5 Interface for the Future Broadband Access Network

VBS接口是ATM业务节点的标准化接口，它规范了接入网（AN）到业务节点（SN）的操作，这样使AN设备与SN设备独立开来，可以实现多厂家设备的互连。本文介绍了VBS接口的基本概念和VBS协议，对VBS接口的协议结构和功能体系进行了详细的描述，并对VBS接口的发展前景进行了展望。

?Open VB5 interfaces enable network operators to interconnect broadband access network equipment and broadband service nodes from different vendors in an independent and flexible way. The basic VB5 concepts and principles are introduced. The major differences between the two VB5 interface variants, as defined by ITU-T, are explained and an overview of the protocol architecture is presented.