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PoE modules boost advanced wireless, VoIP apps

Posted: 28 Dec 2005 ?? ?Print Version ?Bookmark and Share

Keywords:Phihong? power-over-Ethernet? PoE? 802.11N? VoIP?

Phihong USA's new power-over-Ethernet (PoE) products include a one-port high-power midspan for high-speed 802.11N access points, and a redundant power source (RPS) with up to 180 PoE ports for VoIP and IT applications.

Typical applications for the first product, the 30W midspan, includes wireless/Wi-Max network access points, security cameras and IP telephones with streaming video. "Along with the new standard, customers are looking for equipment that is interoperable across multiple vendor platforms," said Keith Hopwood, vice president of marketing. Phihong is a member of the new IEEE 802.3at task force, part of an initiative to increase the power levels distributed via Ethernet to at least 45W.

Working from a universal input, the 30W midspan features diagnostic LEDs and is fully compliant with the IEEE 802.3af standard in detection, disconnect and voltage control. The device is also Gigabit-compatible. DC output voltage for the one-port midspan is 56 volts with accurate overload detection to 0.55A. The outputs are equipped with short-circuit and overload protection, and the output can be shorted permanently without damage.

Phihong's second product, the RPS, accepts three 500W power supplies for powering VoIP phones, DC UPS, and lighting systems with a single uninterruptible power supply (UPS). With 1,500W capability, the RPS can support up to 180 PoE phones (typical VoIP phone draws 8 watts). "Redundant power sources are essential to VoIP systems, particularly for businesses where downtime due to power failure can significantly compromise operations," said Keith Hopwood. "If VoIP power is provided by PoE devices, an RPS is necessary to keep power generating during an outage."

Each output in the redundant power source, which measures 17.25-by-13.77-by-1.75 inches weighs 2.5 pounds, is individually protected against overloads causing overheating of wiring from excessive current, thus fully protecting the system against overload, over-temperature and over-voltage. The RPS features diagnostic capabilities and LEDs next to each connector. The module allows easy connection of a battery plant for full DC UPS capability for VoIP phone systems or network switches. A single battery plant can provide a UPS function for over 180 IP phones or a complete rack of network switches.

Typical pricing for Phihong's 30W midspan is $25 each in OEM quantities. OEM pricing for the PSM1500 series RPS with one 500W supply is $189. Lead time is from stock to 10 weeks.

- Vince Biancomano

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