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White Papers by Data Center Element Architecture Power Cooling Racks & Physical Structures Management Systems Security & Fire Protection Cabling Services

10 result(s) found.

Number	Abstract	Type	Size
WP-18 v0	The Seven Types of Power Problems Many of the mysteries of equipment failure, downtime, software and data corruption, are often the result of a problematic supply of power. There is also a common problem with describing power problems in a standard way. This white paper will describe the most common types of power disturbances, what can cause them, what they can do to your critical equipment, and how to safeguard your equipment, using the IEEE standards for describing power quality problems.		199 KB
WP-43 v2	Dynamic Power Variations in Data Centers and Network Rooms The power requirement required by data centers and network rooms varies on a minute by minute basis depending on the computational load. This magnitude of this variation has grown and continues to grow dramatically with the deployment of power management technologies in servers and communication equipment. This variation gives rise to new problems relating to availability and management.		176 KB
WP-8 v1	Inter-System Ground Noise: Causes and Effects Many power-related problems are the result of Inter-System Ground Noise. This problem cannot be corrected using typical AC-only power protection equipment. The cause and solution of Inter-System Ground Noise problems are described.		272 KB
WP-69 v0	Power and Cooling for VoIP and IP Telephony Applications Voice Over IP (VoIP) deployments can cause unexpected or unplanned power and cooling requirements in wiring closets and wiring rooms. Most wiring closets do not have uninterruptible power available, and they do not provide the ventilation or cooling required to prevent equipment overheating. Understanding the unique cooling and powering needs of VoIP equipment allows planning for a successful and cost effective VoIP deployment. This paper explains how to plan for VoIP power and cooling needs, and describes simple, fast, reliable, and cost effective strategies for upgrading old facilities and building new facilities.		597 KB
WP-1 v5	The different types of UPS systems There is much confusion in the marketplace about the different types of UPS systems and their characteristics. Each of these UPS types is defined, practical applications of each are discussed, and advantages and disadvantages are listed. With this information, an educated decision can be made as to the appropriate UPS topology for a given need.		195 KB
WP-84 v0	Network-Critical Physical Infrastructure for Enterprise Wireless LANs Wireless LAN (WLAN) deployments can result in unexpected or unplanned power, cooling, management and security requirements. Most wiring closets do not have uninterruptible power supplies (UPS), and they do not provide adequate ventilation or cooling required to prevent equipment overheating. Understanding the unique Network-Critical Physical Infrastructure (NCPI) requirements of WLAN equipment allows planning for a successful and cost effective deployment. This paper explains how to plan for NCPI while deploying indoor WLANs in small, medium or large enterprise, with emphasis on power and cooling. Simple, fast, reliable, and cost effective strategies for upgrading old facilities or building new facilities are described.		872 KB
WP-10 v2	Preventing Data Corruption in the Event of an Extended Power Outage Despite advances in computer technology, power outages continue to be a major cause of PC and server downtime. Protecting computer systems with Uninterruptible Power Supply (UPS) hardware is part of a total solution, but power management software is also necessary to prevent data corruption after extended power outages. Various software configurations are discussed, and best practices aimed at ensuring uptime are presented.		410 KB
WP-17 v0	Understanding Power Factor, Crest Factor, and Surge Factor This White paper explains the technical terms of Power Factor, Crest Factor, and Surge Factor. The use of these terms in specifying UPS is explained.		61 KB
WP-9 v1	Common Mode Susceptibility of Computers This Technical Note examines and challenges the claims made in literature regarding the alleged high susceptibility of computers to common mode noise.		269 KB
WP-24 v2	Effect of UPS on System Availability This note explains how system availability and up-time are affected by AC power outages and provides quantitative data regarding up-time in real-world environments, including the effect of UPS on up time.		101 KB