提高FTTX网络维护质量的一种措施

2007年以前，宽带接入技术主要为ADSL技术，为宽带用户提供了尽可能大的带宽，有力地促进了宽带业务的推广。然而，ADSL技术因其技术局限，在超过一公里后，其传输带宽将会大幅下降，接人稳定性恶化，很难满足用户需求。这就是业界说的“带宽与距离”的矛盾。随着通信运营进入全业务运营时代，PON成为全业务运营下的宽带接入方式，如何提高PON网络的维护质量，是电信维护人面临的主要问题。     

ADSL维护测试系统应用问题的探讨

近年来，随着ADSL用户数量的不断增加．接入网络快速扩大．运行设备和线路的维护与管理问题日渐突出。如何建立ADSL宽带维护测试与管理系统，形成建设、运营维护和管理相结合的ADSL宽带产业链．提高ADSL宽带业务的服务质量．已成为各地电信运营商关注的问题。     

华为Smart Test宽带线路测试解决方案

ADSL接入技术是目前发展最快的一种宽带技术,随着宽带网络规模的逐步扩大,在ADSL建设中线路测试和远端维护的重要性日渐突出。华为公司袁千先生的《华为Smart Test宽带线路测试解决方案》一文结合目前ADSL网络建设的实际问题,详细介绍了华为公司Smart Test宽带测试的方案、功能和测试方法,具有很强的实用性。本文提出的宽带测试方案已经获得了商业应用,缓解了ADSL运营中维护的压力,对各运营商开展ADSL接入,解决实际网络问题具有很高 的参考价值。     

广电宽带数据业务用户常见故障及排除

利用有线电视网络资源开展数据增值业务已是大势所趋,而作为广电宽带数据网络运营商,在业务发展的同时,也面临用户故障维护的新挑战。本文结合广电宽带数据网络的运营维护实践,总结了采用以太网和Cable Modem两种接入方式,在运营过程中的常见用户故障及排除。     

广电宽带数据业务用户常见故障及排除

利用有线电视网络资源开展数据增值业务已是大势所趋，而作为广电宽带数据网络运营商，在业务发展的同时，也面临用户故障维护的新挑战。本文结合广电宽带数据网络的运营维护实践，总结了采用以太网和Cable Modem两种接入方式，在运营过程中的常见用户故障及排除。     

光网络运营维护探讨

介绍光网络运营维护的基本情况,对光网络运营维护中的典型案例进行分析,并对光网络运营维护中存在的问题以及解决措施进行探讨。     

ADSL的安装与维护

自2001年7月ADSL业务开通以来,三区已有400多用户,在安装和维护过程中遇到了一些问题也总结了一些经验,为了今后更好的开展宽带业务和其它新业务,我就ADSL的安装和维护工作谈一点目己的看法. 下面将ADSL的技术和特点做简单的介绍.     

光网络运营维护探讨

介绍光网络运营维护的基本情况，对光网络运营维护中的典型案例进行分析，并对光网络运营维护中存在的问题以及解决措施进行探讨。     

光网络运营维护存在问题及解决措施探讨

文章对光网络运营维护的基本情况进行了介绍，对光网络运营维护中的典型案例进行了分析，并对光网络运营维护中的存在问题以及针对问题的解决措施进行了探讨。     

BOSS面临的挑战及思考

本文简单介绍了BOSS(业务运营支撑系统)的概念以及BOSS在电信企业运营维护管理方面的支撑作用,重点剖析了BOSS在当前建设中以及未来新技术、新业务网络中所面临的挑战,如系统的纵向、横向互联问题,企业数据利用问题,BOSS自身维护管理问题等,并从技术和管理上提出了解决建议,希望能为BOSS建设起到一些参考作用.     

Dynamic operation and maintenance systems for switching networks

Some important concepts and techniques related to dynamic operation and maintenance (O&M) systems for switching networks are demonstrated. Five types of node that comprise the dynamic network O&M system being developed by the authors are discussed. They are local exchanges, a centralized operation system, a database system, a diagnostics expert system, and maintenance workstations. The nodes are implemented on an efficient distributed system and use a standardized interface. This O&M system, which is geared toward improved maintenance, focuses on the switching network as a whole, rather than on individual exchanges. In the case of alarms and fault messages, O&M takes corrective action automatically     

动力设备和环境集中监控系统的应用

基站动力设备及环境集中监控系统在移动公司的运营维护中已发挥了不可替代的作用，本文通过对基站动力设备和环境集中监控系统应用实例的研究分析，着重探讨如何充分发挥监控系统的作用，为移动通信网络新的运营维护管理模式提供科学理论依据。     

GSM网长盛不衰引发的思考

分析了GSM在全球获得巨大成功的原因，揭示了GMS在业务承载、研发支撑、运维支持以及与3G互通等方面所面临的挑战。     

中兴宽带线路测试技术及功能介绍

宽带线路测试是中兴通讯ZXDSL综合宽带运维系统的核心功能，在DSL业务提供过程中主要应用在开通前的预测试、线路测试、开通后的例测试以及故障时的在线测试。对其测试技术和功能作了介绍。     

Operation and maintenance field experience for off‐grid residential photovoltaic systems

The field performance of photovoltaic systems has been studied extensively for many applications and a number of databases exist in the United States and internationally. However, these databases focus almost exclusively on the system elecrical performance. Published information on the operation and maintenance (O&M) experience and costs for photovoltaic systems is almost nonexistent. At a time when photovoltaics is being considered as a viable option for distributed energy generation, it is critical that maintenance experience be captured to identify lifecycle costs and/or levelized energy costs for these systems, as well as to identify areas for system and component improvements. This paper addresses the data collection, analysis and results of an off‐grid residential customer service program offered by the Arizona Public Service (APS) Company over a six‐year period from 1997 through 2002. Standardized, packaged photovoltaic systems were offered and operated by APS through a lease arrangement with customers throughout the state of Arizona. The operation and maintenance records for these systems were carefully tracked and analyzed. The O&M costs, database development, cost drivers, lifecycle cost implications, and lessons learned are presented and discussed. Copyright © 2004 John Wiley & Sons, Ltd.     

话务统计分析在运行维护和市场营销中起的作用

通过对C&C08交换系统话务统计功能的实际应用,说明了应用方法以及对运行维护工作和市场营销工作的指导作用,也阐述了做好话务统计分析对通信运营商的重要性。     

Solar based large scale power plants: what is the best option?

There are very few published data comparing performance and cost of thermal and photovoltaic (PV) based solar power generations. With recent intense technology and business developments there is a need to establish a comparison between these two solar energy options. We have developed a simple model to compare electricity cost using these two options without any additional fuel source of hybridization. Capital along with operation and maintenance (O&M) costs and other parameters from existing large scale solar farms are used to reflect actual project costs. To compete with traditional sources of power generation, solar technologies need to provide dispatchable electric power to respond to demand during peak hours. Different solutions for energy storage are available. In spite of their high capital cost, adding energy storage is considered a better long term solution than hybrid solar systems for large scale power plants. For this reason, a comparison between the two solar options is also provided that include energy storage. Although electricity storage is more expensive than thermal storage, PV power remains a competitive option. Expenses related to O&M in solar thermal plant are about ten times higher than PV, an important factor resulting in higher energy cost. Based on data from proven commercial technologies, this study showed that PV holds a slight advantage even when energy storage is included. Copyright © 2010 Crown in the right of Canada. Published by John Wiley & Sons, Ltd.     

集中化、信息化、区域化--转型期移动网络运维的发展方向

随着3G时代的到来，移动网络将步入重大的转型期。本文通过对河北移动网络运维的实例分析说明，集中化是移动网络发展的要求，信息化支撑了集中化的实施，区域化是县区保证网络运维、支撑市场发展的有效途径。文中最后对集中化、信息化、区域化的运维发展趋势做了展望。     

现代电信网运行维护的技术支持系统

在电信网达到一定规模，网路建设速度放慢之时，在设备 应商的名费技术支持到期后，数千万端口多种型号的交换设备和大量传输设备的技术支持由谁来承担？中国电信将采用什么策略 技术手段来保障维护部门能及时得到优质高效的技术支持？本文作者长期从事本地网网管和集中监控系统的开发和工程实施，深深感到与网管配套的运行维护技术支持系统在电信支撑网的建设中的重要性。     

Is $50/MWh solar for real? Falling project prices and rising capacity factors drive utility‐scale PV toward economic competitiveness

Recently announced low‐priced power purchase agreements (PPAs) for US utility‐scale photovoltaic (PV) projects suggest $50/MWh solar might be viable under certain conditions. To explore this possibility, this paper draws on an increasing wealth of empirical data to analyze trends in three of the most important PPA price drivers: upfront installed project prices, operations, and maintenance (O&M) costs, and capacity factors. Average installed prices among a sample of utility‐scale PV projects declined by more than one third (from $5.8/W_AC to $3.7/W_AC) from the 2007–2009 period through 2013, even as costlier systems with crystalline‐silicon modules, sun tracking, and higher inverter loading ratios (ILRs) have constituted an increasing proportion of total utility‐scale PV capacity (all values shown here are in 2013 dollars). Actual and projected O&M costs from a very small sample of projects appear to range from $20–$40/kW_AC‐year. The average net capacity factor is 30% for projects installed in 2012, up from 24% for projects installed in 2010, owing to better solar resources, higher ILRs, and greater use of tracking among the more recent projects. Based on these trends, a pro‐forma financial model suggests that $50/MWh utility‐scale PV is achievable using a combination of aggressive‐but‐achievable technical and financial input parameters (including receipt of the 30% federal investment tax credit). Although the US utility‐scale PV market is still young, the rapid progress in the key metrics documented in this paper has made PV a viable competitor against other utility‐scale renewable generators, and even conventional peaking generators, in certain regions of the country. Published 2015. This article is a U.S. Government work and is in the public domain in the USA.