Repair open in trunk CYL switch circuit. 维修断开的行李箱插孔开关电路。
The Optimum Computing for Circuit Numbers of Trunk Circuit Network in a Local Telephone Network 市话网中继电路网电路数的优化计算
The analysis and design of AM cable trunk target in close circuit TV system is discussed in the paper. 介绍了有线电视网中AM光缆干线传输综合指标的分析与设计。
The network constitution, administration, timing and EOW of DWDM system for Beijing Wuhan, Zhengzhou Xuzhou trunk are introduced and DWDM layer, network element composition and function of SDH circuit layer are emphasized. 介绍了北京武汉、郑州徐州全路最长的干线密集波分复用系统的网络构成、网管、定时及公务通信,重点说明波分复用层及SDH电路层各节点网元组成和功能。
This paper introduces the basic theory, configuration and the technical characteristics of the parameter simulation device for trunk circuit. 介绍了轨道电路参数模拟装置的理论依据、方案和技术特征。
In the course of practice, by making use of the function of configurable signaling of digital trunk unit ( E1) in the switch and by associating with the technology of cross-connection in SDH equipments a new type switching and transmitting mode of dispatching telephone circuit is realized. 在具体操作中,利用调度程控交换机中的数字中继电路(E1)可配置信令功能,结合现代SDH设备的交叉连接技术,实现了一种新型调度电路交换传输模式。
A DDN trunk channel is interrupted much more frequently in mobile telecommunications than one in fixed telecommunications. Therefore, interrupting time of DDN equipment becomes more important in mobile telecommunications, which makes the availability of a DDN circuit much poorer than that of a DDN trunk channel. 在无线移动场合下,DDN中继信道的中断比固定场合下频繁得多,DDN设备中断恢复时间长的问题就变得突出起来,这使得DDN电路的可用性远小于DDN中继信道的可用性。
A Realizing Method of Compatibility in Trunk Transmission System& Regulation of Circuit among PDH, SDH, WDM 干线传输系统兼容性的实现方案&PDH、SDH、WDM之间电路的调接