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When designing structured cabling systems infrastructure for new or refurbished buildings, the connecting hardware being used should conform to the IEC 61 standard and be validated by a qualified third-party laboratory.
ETHERNET TESTING STANDARD PLUS
įigure 4: Areas where contacts of the RJ45 connectors could be damaged under the PoE Plus load
ETHERNET TESTING STANDARD PATCH
The use of PoE Plus on cabling infrastructure can create an electrical arc between the plug contact of the patch cord and the contact of the RJ45 connector during the disconnection phase (see Figure 2). To proactively anticipate and support future PoE Plus technology deployments, the structured cabling systems of LAN networks should be sized to support the higher voltage and current requirements of PoE Plus. This additional power capacity enlarges the scope for those future devices and applications that require additional power (for example, new-generation wireless access points which meet the IEEE 802.11ac standard, recent pan-tilt-zoom motorized cameras, and new versions of building LED lighting systems). PoE technology benefits include cost savings and freedom regarding the location of connected devices.Īn advanced version of this technology, PoE Plus, which has been standardized and ratified by the Institute of Electrical and Electronics Engineers (IEEE 802.3at), can provide up to 30 watts of DC power capacity (compared to 15W DC for standard PoE) on the same data/power cable. This prevents the electrical current from interfering with data transmission. Current enters an Ethernet cable through what is known as an injector. The transmission of data and power are dealt with in a separate manner. The PoE approach uses one cable for both power and data. However, certain precautions need to be taken in order to ensure that any potential cost savings entitlement can be leveraged. Existing investments in current passive network infrastructure may in some cases be preserved. Structured cabling systems (SCS) consist of panels, twisted-pair cables, RJ45 connectors, cords, and enclosures.
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“Passive” network infrastructures (that is to say, network infrastructure within floors, walls, and ceilings like cables and RJ45 connectors that reside in buildings for an average of 7 years before requiring an upgrade) need to be able to support the “active” network infrastructure (equipment like servers and switches that evolve quickly and that are replaced/upgraded much more frequently).įortunately, Power over Ethernet (PoE) technologies can power devices such as IP phones, wireless access points, security cameras, and LED lighting via structured cabling systems infrastructure. Mistakes made in configuring network upgrades could result in avoidable cost. dollarsīuilding facility owners and operators now need to consider and assess the impact of this projected growth on existing networks. Figure 1: Forecast of structured cabling growth in LAN environments from 2006 to 2020, in millions of U.S.