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24/7 Support

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No waiting. No cost. No kidding!

When you call Black Box Network Services Tech Support or click Talk To Tech you’ll be speaking with one of our experts in 30 seconds or less. Our in-house experts are here 24/7 to answer your networking questions—before, during, or after the sale. What’s more, their advice is FREE!

We’re committed to making sure that you get the networking help you need—whenever you need it.

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Click on Talk To Black Box and our experts will call you in 30 seconds or less!

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Call us at 724-746-5500—you’ll be speaking with an expert in 30 seconds or less!

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E-mail us. We’ll answer you in 15 minutes or less.

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Fax your question to 800-321-0746—you’ll receive an answer in 15 minutes or less.

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Black Box Explains
  • NEMA ratings for enclosures.
  • Use one set of twisted-pair wires for both data and low-wattage appliances.
  • In addition to the applications noted above, PoE also works well for video surveillance, building management, retail video kiosks, smart signs, vending machines, and retail point-of-information systems.
  • Save money by eliminating the need to run electrical wiring.
  • Easily move an appliance with minimal disruption.
  • If your LAN is protected from power failure by a UPS, the PoE devices connected to your LAN are also protected from power failure.

  • Converters and Scalers Selector
    PoE Standards PoE
    IEEE 802.3 af
    PoE IEEE 802.3 at
    Power available at powered device 12.95 W 25.5
    Maximum power delivered 15.40 W 34.20
    Voltage range at powred source 44.0-57.0 V 50.0-57.0 V
    Voltage range at powred device 37.0-57.0 42.5-57.0 V
    Maximum current 350 mA 600 mA
    Maximum cable resistance 20 ohms 12.5 ohms
Power over Ethernet (PoE).
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