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PoE midspans cut energy dissipation by 50%

Posted: 07 Feb 2012     Print Version  Bookmark and Share

Keywords:PoE  midspan  energy dissipation 

Microsemi Corp. releases the PowerDsine PD-5524G, its new high-efficiency Power-over-Ethernet (PoE) midspans that boast reduced energy consumption on network cables by as much as 50 per cent 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 30W of power to network devices including IP cameras, access control systems and thin clients, over the same standard CAT5 cabling as data.

Amir Asvadi, VP and general manager of the Analogue Mixed Signal Group at Microsemi said, "Our PD-5524G EEPoE midspan extends the industry-leading efficiency of our PowerDsine family by using a smaller internal power supply that can later be augmented with external supplies to increase per-port capacity as power-hungry devices are added to the network. Customers can optimise their power infrastructure for the highest possible efficiency today, and increase power delivery as demand grows."

Microsemi's 24-port PD-5524G midspan cuts the Ethernet cable energy dissipation by 50 per cent, which equates to 240KWh in annual energy savings assuming continuous operation across 12 ports at full power, according to the company. 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.

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. According to Microsemi, 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.

"Our EEPoE midspans reduce power losses up to 2.25W per link as compared to any alternative PoE solution currently available in the market, including PoE switches and PoE midspans," said Sani Ronen, director of marketing for PoE systems at Microsemi. "The ability to add external power supplies not only delivers power scalability but also provides the means to back-up priority ports in the event of a primary supply failure. Multiple PD-5524G midspans also may be configured for mutual midspan-to-midspan backup."

Microsemi's PD-5524G EEPoE midspan reduces power dissipation for any standards-compliant PD that is attached to the network, including new PDs and any of the devices that have already been deployed. The company's patented EEPoE technology is also used in its PD70x0x ICs, which implement four-pair powering and other techniques for minimising power losses, dissipation and consumption to enable the development of smaller and more energy-efficient PDs. Microsemi's EEPoE products are part of a broad range of both two- and four-pair, standard- and high-power PoE solutions, including PSE ICs, splitters, and both managed and unmanaged midspan products in single- to 24-port configurations, with secure remote management capabilities and both IPv4 and IPv6 addressing support.

Microsemi's PD-5524G EEPoE midspan is available in production volumes for a unit list price starting at Rs.71,000 ($1,399).

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