Do Switches Need PoE?

14 Dec 2023

Network switch, Power over Ethernet switch for telecommunications and a patch panel

Are you struggling to decide whether your network needs a PoE switch?

In this article, we'll look at what PoE is and how it benefits different types of switches. We'll also provide advice for selecting the best switch for your setup. Let's get started!

What is a Switch?

network switch

A switch is a networking device that connects two or more network clients together on the same local area computer network.

It serves as a communication gateway and provides all members of the local network access to one another with regard to data communication, allowing them to share resources like printers and files.

A switch manages incoming and outgoing traffic between devices by sending information in separate packets instead of broadcasting it across entire subnetworks.

What is PoE?

Power over Ethernet (PoE) technology allows powered devices to receive electrical power and data through a single Ethernet cable. It eliminates the need for additional power outlets.

It simplifies installation, improving flexibility and reducing costs when deploying network-enabled devices such as IP cameras, wireless access points, VoIP phones, or other network infrastructure components.

PoE typically provides Gigabit speeds to connected devices but Fast-Ethernet may be available on some newer switches depending on the device requirements.

Additionally, with the introduction of high-power PoE switches it can now provide up to 60 watts of power per port while still providing plenty of data bandwidth.

This makes it an ideal solution for powering strong networking applications such as surveillance systems or wireless networks in environments where traditional methods are either too costly or unfeasible.

Benefits of PoE for Switches

Increased flexibility

PoE switches are used for customized power configurations to meet specific device requirements, especially advantageous in remote or power-challenged locations.

Centralized control and improved scalability enhance adaptability in various workplace environments, giving businesses more freedom in deploying numerous devices.

Real-time monitoring and throttling help optimize energy consumption.

Reduced cost

PoE minimizes installation expenses by eliminating the need for separate electrical cables. This reduces installation times and hardware costs significantly.

Additionally, PoE's ability to supply substantial power per port means that large-scale deployments don't require additional wiring infrastructure, further saving costs.

This is especially valuable in environments like IP phone offices and retail Wi-Fi hubs where efficiency and cost savings are important.

Simplified installation

The integration of PoE technology simplifies LAN network wiring. It reduces installation costs and the number of cables needed when expanding or upgrading a system.

Moreover, PoE switches streamline setup, reduce maintenance effort, and offer redundancy features that enhance network reliability.

This setup is more efficient, secure, and future-proof, delaying expensive upgrades and ensuring control over your infrastructure.

Types of PoE Switches

Standard PoE switches

They enable connected devices such as VoIP phones, security cameras and wireless access points to be powered remotely.

Standard PoE switches follow one of the three standard protocols − 802.3af (15.4 watts), 802.3at (30 watts), or 802 3bt Plus 71 Watts − and any switch manufactured after 2013 is backward compatible with all three standards.

Each PoE switch has its own individual power budget, which determines the total amount of electricity it can provide for powering connected devices; this can usually range anywhere from 15W to 90W per port, depending on the adapter plugged in or switch used within the system.

High-Power PoE switches

These are next-generation Ethernet network switches that provide increased power delivery, greater scalability, and extended distances for efficient cable management.

With their advanced chipset, these switches support multiple high-performance applications to bridge the gap between devices located miles apart while eliminating reconnection of cables.

Connecting multiple devices through one port not only reduces clutter but also simplifies installation and provides a convenient solution for expanding your networks.

Moreover, High Power PoE switches can deliver powerful current up to 90 W over 2500 ft., enabling strong long distance power supplies without requiring expensive wiring or drilling installations in walls – as seen with traditional solutions.

Common Uses for PoE Switches

ip phones

Powering IP phones
Wireless Access Points (WAPs)
IP cameras and surveillance systems
VoIP devices
IoT devices
Digital signage
Access control systems
Point-of-sale (POS) systems

Differences between Managed and Unmanaged PoE Switches

Features	Managed PoE Switches	Unmanaged PoE Switches
Setup and Installation	Require configuration and setup	Plug-and-play, no setup required
Control and Flexibility	Greater control over traffic flow, quality-of-service rules, port access policies, remote monitoring of power usage	Limited control, no advanced configuration options
Cost	Generally more expensive due to advanced capabilities	Less expensive due to simplified functionality
Security	High security with advanced port access policies and authentication server support	Limited security features, suitable for basic networking
Complexity	Complex setup suitable for large, demanding networks	Simple and easy-to-use for basic networking needs
Additional Features	Link aggregation for higher data rates	Integrated firewalls, security systems, and VLANs on all ports

Factors to Consider Before Using PoE with Switches

Power requirements

Consider the power requirements and estimated usage of the connected devices. For instance, if a switch has multiple ports and provides power to many devices, it may require more power than standard PoE supplies can provide.

In such cases, high-power PoE switches may be needed to meet the higher energy needs of connected network equipment while still remaining within acceptable safety limits.

Budget

Manage the PoE budget by assessing the power requirements of each device accurately to prevent power supply issues.

Compatibility

Ensure compatibility between devices by considering power requirements, maximum power budget, and potential heat/power loss concerns.

Tips for Using PoE with Switches

Use compatible cables and connectors according to IEEE 802.3af/at standards.

Employ suitable Power Sourcing Equipment (PSE) to prevent overloading and ensure efficient data transmission.

Monitor power usage to enhance energy efficiency and cost savings, promptly identifying issues for optimal performance and reliability.

Configure PoE ports to connect only when necessary, reducing overall costs and promoting energy conservation.

Conclusion

PoE switches offer a neat solution to the problem of plugging in multiple power sources for various devices on a network, reducing clutter and saving costs.

Their capability to provide both power and data over one Ethernet cable makes them an attractive option for modern installations where cost-effectiveness is important.

PoE switches come in two varieties - standard (one power supply) and high-power (two supplies). In addition, users can choose between managed or unmanaged models based on their requirements.

When selecting which PoE switch to use, it is important to consider factors like powered device compatibility, environmental conditions, budget constraints, etc.

Proper cabling & equipment installation as well as monitoring of power usage also remain important steps when using PoE with switches.