Energy-efficient PoE midspans debuted at Cisco Live London

At the Cisco Live London show, Microsemi launched its new high-efficience PoE midspans. According to the company, these PoE devices reduce energy consumption on network cables by as much as 50% compared to alternative midspans and PoE network switches. The Microsemi PowerDsine PD-5524G EEPoE midspan complies with IEEE802.3at 2009 standards for delivering up to 30 watts (W) of power to network devices including IP cameras, access control systems and thin clients, over the same standard CAT5 cabling as data.The new 24-port PD-5524G midspan cuts the Ethernet cable energy dissipation by 50%, which equates to 240 kilowatt hours (KWh) in annual energy savings assuming continuous operation across 12 ports at full power. With electricity costs averaging approximately $0.15/KWh, this reduction in energy usage can yield up to $600 in savings over a 16-year midspan product life cycle. Additional energy savings are possible using the PD-5524G midspan’s PowerView Pro secure remote power management features, which enable network administrators to monitor and control power devices (PDs) and their power consumption after hours and on holidays and weekends. Use of the PowerView Pro scheduler to restrict power delivery to five 12-hour weekday cycles can yield additional savings of $300 per year, or $4,800 over the midspan life cycle.
The PD-5524G midspan uses technology pioneered in the company’s PD-9500G family to significantly reduce power dissipation and energy consumption by delivering power over all four pairs of CAT5 cabling. The PD-5524G midspan is also the first to leverage a distributed power architecture, which enables smaller internal power supplies to be used for real-time requirements and then augmented incrementally, as needed, with Microsemi PowerDsine RPS 450 units or other external switching power supplies. The midspan supports 10/100/1000BaseT data rates and complies with IEEE802.3at standards to more easily support high-power devices such as PTZ cameras, WLAN access points and thin clients.

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