1.
Only in the case of private lines is it not required.
只有在专线通信的情况下才不需要交换。
2.
Networking of Communication System and Processing of Relevant Problems for Hefei–Wuhan Dedicated Passenger Line
合武客运专线通信系统组网及工程相关问题的处理
3.
The application of the information and communication technology in the railway passenger-dedicated line
信息通信技术在铁路客运专线的应用
4.
Current wireless communications are just too slow, some experts say.
有些专家说，目前的无线通信太慢。
5.
The Research of an Application Specific PRN;
分组无线专用通信系统的研究系统通信协议的设计
6.
On ASIC Algorithm for Power Line Spread Spectrum Carrier Communication;
电力线扩频载波通信专用芯片算法的研究
7.
Study and Practice of Talent Cultivation of Wireless Communication Major;
无线通信专业方向人才培养研究与实践
8.
The Research of Consolidating Police Professional Radio to cope with Emergency and Abrupt Events
加强公安无线通信专网建设积极应对突发事件
9.
radio-communication line of centimetric wave
微波无线电通信线路
10.
The dedicated processors and trunk circuits that are responsible for communication functions in a distributed network.
分布网络中负责实现通信功能的专用处理机和中继线路。
11.
The Design and Performance Analysis of Communication Protocol for Wireless POS Based on TD-CDMA System;
基于TD-CDMA的无线POS专用系统通信协议设计与性能分析
12.
Application Study of Tetra Digital Trunking Communication System in Qin-Shen Passenger Main Libe;
TETRA数字集群通信系统在秦沈客运专线中的应用研究
13.
Research and Implementation of Special Communication Based on Railway GSM-R Drivetest of Wireless System
基于铁路专用通信GSM-R的无线路测系统的研究与实现
14.
An Optical Cable On-Line Monitoring System for the Railway Communication Network
光纤在线自动监测系统在铁路通信专网中的应用
15.
Remote Hospital Network Management:Rational Use of Vpn and Ddn
医院异地网络通信管理——合理运用vpn和ddn数字专线
16.
Opportunities and Challeges to Information Specialists Changed from Communication Experts;
从通信专家到信息专家的机遇与挑战
17.
defense special secure communication system
国防专用保密通信系统
18.
Corporate computer information networks and other networks which are connected with international networks through special lines shall be operated for internal use only.
企业计算机信息网络和其他通过专线进行国际联网的计算机信息网络，只限于内部使用。