Brief Introduction of SX-200 PBX Employing Stored Program Control

Failures analysis on the 2 M digital trunk of SPC exchanger

程控交换机2M数字中继故障分析

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Large-scale enterprise or company groups own inside private branch ( telephone) exchanger ( PBX) equipment and the internet connection equipment.

大型企业或公司集团，往往具有内部程控交换机PBX设备，以及接入互联网络。

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Management And Maintenance Of SDH Transmission Equipment Maintenance of Program Control Exchange

浅谈SDH传输设备的管理及维护程控交换机的维护

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Design of SPWM Switching Mode Bell-Current Supply Applied to Program Exchange

程控交换机SPWM铃流源的设计

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This paper proposes the application prospects, functions and technique characteristics of the UPS power supply system monitor.

介绍了UPS电源系统监控仪的应用前景、功能及技术特性；

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UPS Power Supply in Support Controlled by MPU

微机控制后备式UPS电源

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A Study of UPS Series Power Supply for a New Type of Low-Powered Transistor

一种新型晶体管小功率UPS系列电源的研究

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Communication systems include access network, synchronous optical transmission systems ( SDH), program-controlled switching system, transmission clock, UPS power supply and so on.

通信系统主要包括综合业务接入网、光同步传输系统（SDH）、程控交换机系统、传输时钟、UPS通信电源等。

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Comparative analysis of common industrial network monitoring of the present situation, the established Internet and CAN-based embedded system bus on the UPS power supply for network monitoring, based on the Linux operating system to complete the monitoring system development.

通过对比和分析工业监控网络的现状之后，确定采用基于Internet和CAN总线的嵌入式系统对UPS电源进行网络监控，完成了基于Linux操作系统的监控系统开发。

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Finally, this article applies the model of minimizing the design cycle and design defects controlling system to the improved design of UPS power supply.

本文最后将设计周期最小化模型及设计缺陷控制体系应用于某公司UPS电源外壳的改良设计。

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In recent years, with extensive use of UPS power supply, UPS power monitoring and control of the requirements for more and more high, and embedded systems use and popularization of Internet, making this demand has become possible.

近年来，随着UPS电源的广泛使用，对UPS电源的监控要求也越来越高，而嵌入式系统的使用和Internet的普及，使得这种需求成为可能。

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Use and maintenance of UPS reserve power supply

备用UPS电源的使用和维护

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This paper also describes the structure IDC room power supply system, and UPS power supply system, an analysis of the detailed design works order.

本论文同时阐述了IDC机房供电系统结构，并对UPS供电系统的详细设计工程进行了分析整理。

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In order to meet this kind of transfer requirement, the UPS power supply system also becomes more and more complex.

为了适应这种变化的需要，UPS系统变得越来越复杂。

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Typical application: The users of Power, communication, railway, army, spaceflight, oilfield, finance industry and factories of manufacturing UPS power supply, DC screen and battery set.

电力、通信、铁路、军队、航天、油田、金融等各行业及使用和生产UPS电源、直流电源和蓄电池组的用户和厂家。

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Emphasis was put on application of the chip to UPS inversion power supply and switching power supply, and using it makes a high efficient inversion power supply and switching power supply.

讨论了该芯片在UPS逆变电源和开关稳压电源中的应用，利用该芯片设计并制作了高效率的开关电源与UPS逆变电源。

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A fiber field-bus communication system based on complex programmable logic devices ( CPLD) and optical transceiver was designed for some special industrial fields such as colliery and airfields.

针对煤矿、机场等特殊工业现场，设计了一种基于复杂可编程逻辑器件（CPLD）和光模块的光纤现场总线通讯系统。

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The module design contains transmission line, bias and APC circuit of LD, low noise and high linearity RF circuit, FSK modern, monitor and control circuit design and PCB layout.

本文重点进行了光模块主要的电路包括传输线、LD偏置电路与APC电路、低噪声高线性射频电路、FSK调制与解调功能电路与监视控制功能电路的设计。

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Test results indicate that the test platform for optical module can measure the main parameters of the optical module automatically which can improve the accuracy and efficiency of the test of optical module and meet the design requirements.

测试结果表明：该测试平台能够自动测试光模块主要参数，提高光模块测试效率和准确率，达到了设计需求。

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Thus, an economical and effective way to solve this problem is to construct a repeater, and as the core component of the fiber optic repeater, the radio frequency optical module has a significant increase on demand.

建设直放站是解决信号覆盖问题的一个经济又有效的选择，因此作为光纤直放站核心部件的射频光模块的需求在大量增加。

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