本文就以社区宽带综合业务网络系统为背景，阐述了一款高速以太网交换机——SW224的硬件设计实现。
In this paper, we will introduce the design of one high speed Ethernet switch, SW224, with the background of Community Broadband Network System with Integrated Services.
宽带业务相关模块主要包括以太网交换相关的驱动，协议和管理模块等。
The broadband service modules include the driver, protocol and management modules related to the Ethernet switching.
为了适应网络宽带化、分组化的发展趋势，PSTN中的数字程控交换要逐步演进为包含ATM交换和IP功能的综合业务交换平台。
To adapt to the broadband and packetized network development trend, the digital SPG switching paradigm in PSTN should be gradually evolved to a combined ATM and IP service switching platform.
第二，路由交换设备必须具有良好的组播支持能力，用于支撑具有动态组播特性的宽带流媒体网络承载业务；
Second, they should be able to support multicast, which can be used for carrying broadband multimedia network traffic with dynamic multicast characteristic.
中国铁通互联网是实行统一管理、集中调度的高速宽带IP，可向用户提供互联网接入、多协议标签交换虚拟专网等业务。
CTT net is a high speed broadband IP network with concentrated condition and unified management, which can provide users with Internet access, - and other functions.
先进的数字移动通信技术、sdh光通信系统技术、密集波分复用技术得到广泛采用，宽带综合业务数字网、at m宽带交换系统等高新技术正在网上试验。
Advanced technologies like digital mobile communications, SDH, dense WDM, etc. have found wide application and high and new technologies like B-ISDN and ATM are on trial over the network.
先进的数字移动通信技术、sdh光通信系统技术、密集波分复用技术得到广泛采用，宽带综合业务数字网、at m宽带交换系统等高新技术正在网上试验。
Advanced technologies like digital mobile communications, SDH, dense WDM, etc. have found wide application and high and new technologies like B-ISDN and ATM are on trial over the network.
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