Phihong is the leading manufacturer of power supplies, power adapters, LED drivers,  power-over-ethernet internet midspans, and custom/oem solutions
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In this section:

For Immediate Release

March 29, 2007

For more information contact:
Johny Chen, Phihong
(510) 445-0100

Patricia Staino, BtB Marketing

IEEE committee further defines standards for high-power PoE equipment….

Phihong Proposal for High-Power PoE Accepted By IEEE Committee

FREMONT, Calif. (March 29, 2007) — Phihong USA, the global leader in low-cost Power-over-Ethernet solutions, proposed allowing midspans used in Power-over-Ethernet applications to put the power onto the data pair as required for Gigabit systems. The proposal was made to the IEEE802.3at task force at its most recent meeting on March 13 – 15, 2007 in Orlando, FL.

“Numerous presentations to the IEEE have proven that this can be done without affecting the ‘channel characteristics’ as specified in IEEE802.3 specifications,” said Keith Hopwood, vice president of marketing for Phihong USA.

Putting the power on the data pair is required for Gigabit systems as all wires are used to carry data. If 4-pair powering gets ratified then it will also be required to carry power on all the wires that carry data as well.

Phihong’s PoE midspans already do this. Many customers have already implemented this although it is technically outside the current IEEE802.3 specification. This approved resolution puts specific text into the new specification that makes it official.

The new standard is now in draft, and many items can still change. The standard is still a year away from ratification, but it is now possible to build hardware that meets these requirements with a high degree of confidence that they will be compliant to the standard.
When implemented as a standard, IEEE 802.3at (PoEPlus) will not only allow POE in Gigabit systems but will enable at least 30W of power and potentially up to 60W.  Phihong has already developed many products that deliver high-power PoE, but most customers would prefer a common industry standard for all devices on the market.

Applications that will benefit from the increased IEEE802.3at classifications and voltage include wireless multi-radio access points, Pan Tilt Zoom security cameras, IP phones with streaming video displays, computer workstations and LCD display panels.

Other emerging applications, including emergency lighting, security system sensors and even medical monitoring, will greatly benefit from combining data and centralized backup power.

Phihong has been a member of the 802.3at task force since its inception in 2005.

About Power-over-Ethernet
Power-over-Ethernet allows both power and data to be carried over a single Ethernet cable, enabling a device to operate entirely from the power it receives through the data cable.  This eliminates the need for additional wall outlets, so phones can be moved around offices without costly and time-consuming rewiring.

About Phihong
Phihong is the leading supplier of power and accessories to personal electronic, Networking and Home Entertainment OEM’s supplying power, cradles, hands-free headsets, interface cables and virtually any accessory required for the personal electronic device. With global sales for 2007 expected to exceed $500 million, Phihong has engineering and manufacturing facilities in North and South America, Taiwan and mainland China. For more information contact Johny Chen, Phihong, 47800 Fremont Blvd., Fremont, CA 94538, or call (510) 445-0100, fax (510) 445-1678, email or visit

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