PoE-Power Over Ethernet

What is PoE – Power Over Ethernet Austin

June 14, 2024

kacey

What is PoE?
- Power over Ethernet (PoE) enables the transmission of both data and power through a single Ethernet cable. This technology eliminates the need for separate data and power cables, streamlining installation and cutting costs.
- It is commonly utilized for devices such as wireless access points, IP cameras, and VoIP phones.
How Does PoE Work?
- Power over Ethernet (PoE) technology injects direct current (DC) power into an Ethernet cable, concurrently with the data signal.
- Devices equipped with Power over Ethernet (PoE) capability can receive electrical power through the same cable that provides their network connection, either via a network switch or a PoE injector.
Types of PoE:
- IEEE 802.3af (PoE): Provides up to 15.4 watts of power per port.
- IEEE 802.3at (PoE+): Offers up to 30 watts per port.
- IEEE 802.3bt (PoE++): Delivers up to 60 watts or more per port.
Benefits:
- Simplified installation: means there’s no requirement for separate power outlets close to devices.
- Cost Savings: Reduced cabling and electrical work.
- Flexibility: Easily move devices without rewiring.
Considerations:
- Power Budget: Ensure your network switch or injector can handle the total power needed by connected devices.
- Cable Length: Power over Ethernet (PoE) is effective up to a distance of 100 meters (328 feet) when using Cat5e, Cat6, Cat6a, Cat7, or Cat8 cables without the use of repeater or without minimizing ethernet speed.

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