PASSIVE OPTICAL LAN
Passive Optical LANs (POL) are replacing traditional copper-based local area networks (LANs) because deploying fiber optics to the edge of the network increases bandwidth and lowers TCO.
POL utilizes a fiber backbone effectively making network infrastructure future-proof. As technology evolves, only end points will require upgrades, unlike copper LANs which require disruptive rip-and-replace upgrades for cabling and equipment. POL is an infrastructure asset that improves the value of a building. EnerSys® pioneered the use of NEC® Class 2 distributed power systems to bring power to the POL Optical Network Terminations (ONT). Power is safely delivered over copper cables to ONTs located far from a power source. Like POL, the distributed copper power network becomes a valuable asset for building owners.
With power density and footprint in mind, our eLimiter+ Class 2 power distribution unit can power up to 36 ONTs. Cables extending from the eLimiter+ connect directly to the ONT, eliminating the need for an AC outlet at the far end. Compliance with Class 2 standards eliminate the need for licensed electricians to perform the installation and turn up.
Two primary power architectures address most buildings—centralized or distributed—usually defined by the size and shape of a building. The centralized architecture includes a -48VDC power plant and batteries located in a central location such as the basement. The -48VDC power connects to floors equipped with an eLimiter+. The single DC plant and batteries is simple to maintain plus requires minimum space on each floor.
In a distributed architecture, smaller -48VDC power plants are collocated with each eLimiter+. This lowers equipment and installation costs, but requires space in the equipment rooms.
Remote power has been a key enabler in the growth of POL. For systems integrators, remote power improves reliability and lowers TCO.Brian Hanson, EnerSys Strategic Account Manager
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