给出了无线移动数字校园网的基本组成，从网络分层模型出发，对无线移动数字校园网络的接入层、汇聚层、核心层进行分层设计。
The basic structure of wireless mobile digital campus network is given in this paper, and the layer model, including the core layer, distribution layer and access layer, is designed.
文中在讨论宽带综合业务数据网（B-ISDN）网络分层模型的基础上，介绍了实现APON系统中ONT的总体方案功能模块图，并根据协议和ONT技术要求提出了通道层硬件电路设计。
The paper introduced the functional block schematic of realizing the whole ONT in APON based on the network model of B-ISDN and bring forward path layer system design according to the protocol.
用分层模型的方法识别和改正位于1、2、3和七层的常见网络故障。
Identify and correct common network problems at layers 1, 2, 3 and 7 using a layered model approach.
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