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一、用户接入规程 帧中继业务是通过用户设备和帧中继网络之间的标准接口提供用户信息的双向透明传送、并保持其顺序不变的一种承载业务。用户和网络之间的接口称为用户网络接口(UNI),如图1所示。在用户网络接口用户端是帧中继接入设备,用于将本地用户设备接入帧中继网。 帧中继接入设备可以是标准的帧中继终端、帧中继装/拆设备,以及提供
First, the user access protocol Frame Relay service is through the standard interface between the user equipment and the Frame Relay network to provide two-way transparent transmission of user information, and to maintain its order of a bearer service. The interface between the user and the network is called the user network interface (UNI), as shown in Figure 1. The user network interface client is a frame relay access device for accessing the local user equipment to the frame relay network. Frame relay access devices may be standard frame relay terminals, frame relay loading / unassembling devices, as well as providing