电路交换网络

回顾了QoS路由技术在电路交换网络，ATM网络和IP网络中的演进与应用。

Then the evolution of QoS routing technologies in circuit switched network , ATM network and IP network is reviewed .

伪线仿真技术无缝连接了现有时分复用设备和分组网络，为传统电路交换网络的改造提供了一套低成本的解决方案。

The technology of pseudo wire seamlessly connects Time Division Multiplexing equipments to packet networks , which provides the reconstruction of traditional circuit switched networks with a low price solution .

由于技术和成本问题，传统电路交换网络与基于IMS的分组交换网络还将会在很长时间内并存。

Traditional circuit-switched network will coexist with packet-switched network based On IMS for a long period because of technology and cost .

以往的多媒体通信业务主要基于电路交换网络，随着基础数据业务的快速稳定增长和网络规模的持续增长，多媒体通信业务的发展趋势将基于包交换网络，如IP网络。

The communication of multimedia is mostly based on the Circuit Switching in the past , and with the improvement of the foundation of data operation , the tendency is based on the packet switched data network .

此外，传输层允许IMS设备通过PSTN网关呼叫PSTN网络或其他电路交换网络和接收来自这些网络的呼叫。

In addition , the transport layer allows IMS devices to make and receive calls to and from the PSTN network or other circuit-switched networks via the PSTN gateway .

信令网关作（SG）为软交换网络和电路交换网络的控制信令消息转换互通节点，是整个软交换网络的重要功能实体，负责对信令消息进行中继、翻译或终结处理。

Signaling Gateway who is the exchange node controlling signaling information between soft-switched networks and circuit-switched network is an important functional entity of the entire NGN , and Responsible for signaling infomation to relay , translation or end treatment .

MPSRP3S是我公司（上海贝尔阿尔卡特）为提高System12交换机的容量以及增加业务类型而推出的全新的交换矩阵，它取代了传统S12交换机的电路交换网络（DSN）。

MPSR P3S is a brand new switch matrix for System 12 Exchange of Alcatel , which is used to replace the aged Digital Switch Network ( DSN ) .

等同与程控交换是电路交换网络的核心。

It likes that circuit switch is the kernel of circuit switch network .

电路交换网络的性能分析

Analysis on Performances of Circuit - Switched Networks

电路交换网络的线路利用率低、新业务开展困难等缺点，促使人们探索新技术。

With the circuit switch , line utilization is low , and it is difficult to develop new services , thus we must research and develop new technologies .

即便是在电路交换网络之中，应用也可以即刻启动，因为这些应用安装在本机上&需与远程服务器交换数据，这样就避免了电话网络的繁忙对于使用的影响。

Even on circuit-switched networks , applications start immediately since they reside on the phone – with no need to wait for a data call to be initiated .

尽管下一代网络具有传统电路交换网络无法比拟的优越性，但是，人们不可能抛弃现有的网络而去建设一种全新的的网络。

Although the next generation network has the superiority which the traditional circuit switching network is unable to compare , but it is impossible to abandon the existing network to build a new network .

与传统基于功率控制和资源固定分配的电路交换网络无线资源管理机制不同，分组数据的无线资源管理架构中采用了基于速率控制的链路自适应技术、快速分组调度以及拥塞控制等功能。

Radio resource management for mobile packet-based traffic , distinct to that based on the power control and the static resource allocation for conventional circuit-switched services , that adopts rate-control-based link adaptation mechanism and fast packet scheduling as well as congestion control scheme .

该系统不仅可用于PSTN，也可用于其它和PSTN类似的基于电路交换和网络本身没有保密的系统。

This system is applied in not only PSTN but also non-security system based on circuit switched networks .

传统的基于电路交换的电话网络（SEN）与基于包交换的IP网络（PSN）的融合，给人们展示了一个巨大的发展空间。

The inosculation of traditional telephony network based on circuit-switch ( SCN ) and IP network based on packet-switch ( PSN ) unfurls a huge developing space to us .

引入一种基于电路交换WDM光网络的业务模型，推导出波长连续光网络和波长可转换光网络中阻塞概率关于光开关大小的公式。

A traffic model for circuit-switched WDM optical networks used to obtain the formula of blocking probability about switch size ( nodal degree ) for networks with and without wavelength changers was introduced .

电路交换网与IP网络发展趋势

The Developing Trend of Circuit Switched Networks and IP Networks

从发展的角度来看，NGN是在传统的以电路交换为主的PSTN网络中逐渐迈出了向以分组交换为主的IP网络的步伐。

From a development perspective , NGN is a traditional circuit-switched PSTN-based networks in order to gradually step to IP-based packet switching networks pace .

利用奇偶校验电路诊断T-S-T数字交换网络中的多重故障

Multiple Fault Diagnosis in T-S-T Digital Switching Networks Using Parity Checkers

而基于分组交换的片上光网络也比基于电路交换的片上网络具有更高的链路利用率。

The optical network on chip based on packet switching has a higher link utilization than that use circuit switching .

在软交换网络体系中，IP中继媒体网关主要用来完成电路交换网侧与IP分组网侧媒体流的转换，该网关同信令网关一起完成电路交换网与IP网络的互通。

Trunking Media Gateway transmits media stream between IP and circuit switching networks , implements interworking of IP and circuit switching networks with signaling gateway in softswitch network .