VoIP Deployment For Dummies

石头

作者：Stephen P. Olejniczak
出版日期：November 17, 2008
出版社：Wiley Publishing
页数：432
ISBN：ISBN-10: 047038543X ISBN-13: 978-0470385432
文件格式：PDF


Product Description
So you’re in charge of implementing a VoIP phone system for your organization? VoIP Deployment For Dummies is a crash course in Voice over Internet Protocol implementation!
Here’s how to analyze your network and implement a VoIP phonesystem, manage and maintain it, keep it secure, and troubleshootproblems. You’ll learn how to plan the rollout, work with SessionInitiation Protocol (SIP), handle fax issues, and keep your users happy.

• Understand how VoIP works, common misconceptions about it, and the pros and cons for your organization
• Compare and comprehend hardware and software choices
• Discover the options for touch tones and faxing via VoIP systems
• Analyze network devices, IP addresses, connections to remote sites, and other aspects that will affect VoIP implementation
• Draw up a test plan, check out both voice and fax transmission, get a report, and schedule the installation
• Investigate SIP call generation, identify the elements, understand cancelled calls, and re-INVITE calls
• Troubleshoot your system, identify call variables, trace the source of a problem, manage trouble tickets, and resolve failures
• Manage latency, jitter, and flap, and take advantage of Wireshark
• Find out what to expect when your system goes live

Written by an expert with extensive real-world experience in VoIP implementation and management, VoIP Deployment For Dummiesprovides the know-how you need. You’ll be able to implement your systemand manage any issues proactively, which is sure to look good to yourboss!
From the Back Cover
Get your business talking online with this handy guide to VoIP implementation
Your organization has made the decision to go with VoIP. Now it’s upto you to implement the system. Well, fear not —here’s the crash courseyou need! Learn how to analyze your system, plan the rollout, monitorand maintain VoIP, work with Session Initiation Protocol (SIP),troubleshoot your system, fax with VoIP, and keep your users happy.

• Understand — how VoIP works and the pros and cons for your organization
• Be prepared — analyze your network, its devices, IP addresses,connections to remote sites, and other issues that affect VoIPimplementation
• When it’s not a voice — discover the options for touch tones and faxing via VoIP systems
• Line up your tools — compare and evaluate hardware and software options for VoIP
• Activate — draw up a test plan, check out both voice and fax transmission, get a report, and schedule the installation
• Just a SIP — investigate SIP call generation, identify the elements, understand cancelled calls, and re-INVITE calls
• Keep it running — troubleshoot your system, identify callvariables, trace the source of a problem, manage trouble tickets, andresolve failures

Open the book and find:

• Clarification of common misconceptions about VoIP
• The anatomy of a VoIP call
• How to manage latency, jitter, and flap
• Why touch tones and faxes pose special challenges
• How to choose a fax option
• What Wireshark is and how to use it
• How to identify the footprint of a problem
• What to expect when your system goes live

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毛彦

粘钢加固施工工艺一.粘钢施加固工工艺:  
流程:粘贴面处理 → 加压固定及卸荷系统准备(根据实际情况和设计要求，卸荷步骤有时省去) → 胶粘剂配制 → 涂胶和粘贴 → 固化、卸加压固定系统 → 检验
1.粘贴面处理
1.混凝土面应凿除粉饰层，油垢、污物，然后用角磨机打磨除去1-2mm厚表层，较大凹陷处用找平胶修补平整，打磨完毕用压缩空气吹净浮尘，最后用棉布沾丙酮拭净表面，待粘贴面完全干燥后备用。
2.钢板粘贴面应用角磨机进行粗糙、除锈处理，直至打磨出现光泽，使用前若洁净仅用干布擦拭即可。否则可用棉布沾丙酮拭净表面，待完全干燥后备用。
3.该工序所用主要物资:护目镜、防尘口罩、冲击电锤及扁铲、手锤、角磨机、金刚石磨片、砂轮片、空压机、棉布、清洗容剂。

2.加压固定及卸荷系统准备
  1.加固构件所承受的活荷载如人员、办公机具宜暂时移去，并尽量减小施工临时荷载。
  2.加压固定宜采用千斤顶、垫板、顶杆所组成的系统，该系统不仅能产生较大压力，而且加压固定的同时卸去了部分加固构件承担的荷载，能更好的使后粘钢板与原构件协同受力，加固效果最好，施工效率较高。
  3.加压固定也可采用膨胀螺栓、角钢、垫板所组成的系统，该系统需要在加固构件上合适位置钻孔固定膨胀螺栓，仅能产生较小压力，不能产生卸荷效果，适合侧面钢板的粘贴。

3.粘钢胶配制
1.建筑结构胶为A、B两组份，取洁净容器（塑料或金属盆，不得有油污、水、杂质）和称重衡器按说明书配合比混合，并用搅拌器搅拌约5-10分钟至色泽均匀为止。搅拌时最好沿同一方向搅拌,尽量避免混入空气形成气泡，配置场所宜通风良好。
2.该工序所用主要物资:搅拌器、容器、衡器、腻刀、手套。

4.涂胶和粘贴
1.胶粘剂配制好后，用腻刀涂抹在已处理好钢板面上(或混凝土表面)，胶断面宜成三角形，中间厚3毫米左右，边缘厚1毫米左右，然后将钢板粘贴在混凝土表面，用准备好的固定加压系统固定，适当加压，以胶液刚从钢板边缝挤出为度。
2.该工序所用主要物资:加压固定及卸荷系统，腻刀、手套。

5.固化、卸加压固定系统
1.该工序所用主要物资:扳手、手套、时钟、温度计。

6.检验
1.JGL型结构胶操作性能极好，正常操作可达到100%的饱满度。检验时可用小锤轻击粘贴钢板，从音响判断粘贴效果，也可采用超生仪检测。若锚固区有效粘结面积少于90%，非锚固区有效粘结面积少于70%，用钻孔注胶粘贴钻孔时钻两个孔一个作为排气孔一个作为注胶孔。
2.对重要构件也可采用载荷检验，一般采用分级加载至正常荷载的标准值，检测结果较直观、可靠，但费用较高，耗时也较长。需要千斤顶或配重（常用沙袋、砖块）、百分表