What is PoE+?

PoE+ (Power over Ethernet Plus) is an enhanced version of the Power over Ethernet (PoE) standard that provides increased power delivery capabilities to support a wider range of powered devices. It was introduced to address the growing power demands of modern network devices, such as high-powered wireless access points, IP cameras, and VoIP phones, which often require more power than the original PoE standard could deliver.

How PoE+ Works

Like its predecessor, PoE+, defined by the IEEE 802.3at standard, uses the existing Ethernet cabling infrastructure to deliver both data and power to compatible devices. However, PoE+ can provide up to 30 watts of power per port, compared to the 15.4 watts supported by the original PoE (IEEE 802.3af) standard.

The increased power delivery is achieved through several key technical enhancements in PoE+:

Power Sourcing Equipment (PSE): PoE+ PSEs, such as switches and midspan devices, can deliver up to 30 watts of power per port, compared to the 15.4 watts of the original PoE standard.
Powered Devices (PDs): PoE+ PDs, such as network devices, can draw up to 30 watts of power, allowing for the use of more power-hungry components and features.
Power Negotiation: PoE+ devices use an enhanced power negotiation process to establish the appropriate power requirements between the PSE and PD, ensuring efficient and safe power delivery.
Improved Power Efficiency: PoE+ devices are designed to be more power-efficient, reducing energy consumption and minimizing heat generation.

Key Benefits of PoE+

The increased power delivery of PoE+ offers several key benefits:

Support for Higher-Power Devices: PoE+ enables the use of more advanced network devices, such as high-performance wireless access points, PTZ (pan-tilt-zoom) cameras, and IP phones with larger displays, which require more power than the original PoE standard could provide.
Simplified Installation: By delivering both data and power over a single Ethernet cable, PoE+ reduces the need for separate power outlets, simplifying the installation process and reducing the overall infrastructure costs.
Improved Energy Efficiency: PoE+ devices are designed to be more energy-efficient, reducing power consumption and cooling requirements, which can lead to lower operating costs and a smaller environmental footprint.
Increased Deployment Flexibility: The higher power delivery of PoE+ allows for the deployment of powered devices in locations where traditional power sources may be unavailable or difficult to access, such as ceilings, walls, or remote areas.

Common Use Cases for PoE+

PoE+ is widely used in a variety of applications, including:

Wireless Access Points: PoE+ enables the deployment of high-performance wireless access points that can support more users, provide faster data rates, and offer advanced features like beamforming and multi-user MIMO.
IP Cameras: PoE+ powers IP-based security cameras, including PTZ (pan-tilt-zoom) models, which often have higher power requirements due to their advanced features and functionalities.
VoIP Phones: PoE+ supports the deployment of IP phones with larger displays, integrated speakers, and other power-hungry components, providing a seamless and feature-rich communication experience.
Industrial Automation: PoE+ enables the deployment of industrial devices, such as sensors, controllers, and actuators, in environments where traditional power sources may be limited or difficult to access.

Best Practices and Considerations

When deploying PoE+ systems, it's important to consider the following best practices and important considerations:

Power Budget Planning: Carefully assess the power requirements of all connected devices to ensure that the PoE+ power budget is sufficient and that the system is not overloaded.
Cable Quality: Use high-quality Ethernet cables that are capable of supporting the increased power delivery of PoE+, as inferior cables may overheat or experience voltage drops, compromising the performance and reliability of the system.
Thermal Management: Ensure that PoE+ devices and the surrounding environment have adequate cooling mechanisms to dissipate the increased heat generated by the higher power delivery.
Backwards Compatibility: PoE+ devices are designed to be backwards compatible with the original PoE standard, allowing for mixed deployments of PoE and PoE+ devices on the same network infrastructure.

Conclusion

PoE+ is a crucial advancement in the field of Power over Ethernet, enabling the deployment of more powerful and feature-rich network devices while maintaining the benefits of simplified installation and improved energy efficiency. As the demand for high-performance, networked devices continues to grow, PoE+ will play an increasingly important role in supporting the evolving needs of modern IT infrastructures.