波分复用光网络的出现，给现代通信网注入了新的生机和活力。
With the development of optical wavelength division multiplexing (WDM) networks, which have injected energy and vigor into modern communication networks.
随着高速光传输技术和智能光网络技术的不断成熟，现代通信网正朝着高速化和宽带化的方向演变。
As high speed optical transmission technology and intelligent optical networking technology gradually become mature, modern communication network is developing toward high speed and broad bandwidth.
现代通信系统是陆-海-空三维通信网，三维通信网的组成主要制约于水下通信。
Modern communication system is a land-sea-space three-dimensional communication network whose realization is mainly restrained by underwater communication.
随着现代信息社会对通信业务要求的不断增长，图像通信与通信网容量的矛盾日益突出。
Along with the growth of the communication operation in the modern information society, the image correspondence and the communications network capacity have sharp contradiction.
文中还介绍了现代列车采用的通信网拓扑结构和通信协议。
Topology and agreement of communication adopted by modern trains are also concerned.
归一化传输容量加权通信网端到端可靠性指标，非常适合评价现代高速宽带通信网络。
The normalized port to port reliability index weighted by transmission capacity of communication network is very fit to evaluate modern high speed and wide band communication networks.
现代各种通信网络的网内和网间信令系统大多是七号信令系统，其对于通信网的服务质量和服务水平起着非常重要的作用。
The No. 7 signalling system is mostly used between networks and inner network in all sorts of modern telecommunication network. It plays an important role in the quality and level of service.
随着现代信息社会对通信业务要求的不断增长，图像通信与通信网容量的矛盾日益突出。
With the rapid growing communication service requirement of the society, the confliction between video communication and transmission capability becomes more and more prominent.
随着现代信息社会对通信业务要求的不断增长，图像通信与通信网容量的矛盾日益突出。
With the rapid growing communication service requirement of the society, the confliction between video communication and transmission capability becomes more and more prominent.
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