| 1. | A packet network works like the postal system
译文： “包交换”网络类似邮政系统。 |
| 2. | Technical barriers initially hampered the use of packet networks for real - time communications
技术问题是网络实时信息包传输的障碍。 |
| 3. | Connect center has become the information platform to converge tradition pstn with packet network
连接服务平台已经成为传统电话网同企业内部分组网融合的信息平台。 |
| 4. | But why is availability an issue in today ' s packet networks that deliver atm , frame relay or ip services
但是为什么在今天提供atm 、帧中继或ip服务的包交换网中可用性成了一个问题？ |
| 5. | In packet networks , atm , frame relay and ip organize and transmit data in collections of bytes , or packets
在包交换网中， atm 、帧中继和ip是以字节的集合（即包）来组织和发送数据的。 |
| 6. | For example , packet networks were not designed to guarantee the sequential delivery of packets and packets could be lost
例如，最初的网络不是为实时传输信息包而设计的，且还会出现丢包现象 |
| 7. | Obviously , to participate in a packet network , each “ node ” ( workstation , server , and router ) must have an “ address ”
很明显，为了能参与到包交换网中，每个节点（工作站、服务器、路由器）都必须有一个地址。 |
| 8. | The itu - t is continuously enhancing h . 323 and publishing new versions to support the evolving requirements of next generation packet networks
Itu - t正在不断地改进和研发新版的h . 323协议，以适应新的需求和新型网络。 |
| 9. | Media gateways will be the junctions that provide a path between circuit - switched and packet networks for such media as voice and fax
介质网关是一种连接，它将为语音和传真一类的介质提供电路交换网和包交换网之间的通道。 |
| 10. | H . 323 provides the technical framework for developing standards - compliant products and systems for real - time voice and video communication over packet networks
H . 323协议为开发实时网络传送声音和图像产品提供了一个技术框架。 |
