When setting up a network, choosing the right switch is crucial for performance, efficiency, and future scalability. One key decision is whether to use a Power over Ethernet (PoE) switch or a Non-PoE switch. Both have their advantages and best-use scenarios, and understanding their differences can help you make an informed decision.
What is PoE?
Traditionally, when a device connects to a network, it requires two inputs: a power cord and a network cable. PoE is a technology that allows an Ethernet cable to carry electrical power.
In a PoE network, the power sourcing equipment can supply power and transmit data to network devices. All this is done by a single, PoE cable.
What is a PoE Switch?
A Network Switch that is capable of transmitting the data as well as powering the devices connected to it is known as a PoE Switch. As a result, you don’t need a separate power supply for the devices as the PoE Switch does it all.
An important point about PoE Switches is that the nominal voltage of the power supply is around 48V. The first job of a PoE Switch is to determine whether a device needs power or not. It will perform a simple Resistance Test on the terminal device (also known as the Powered Device).
It will then use the result from this test to label a device as PoE or Non-PoE device. After that, the PoE Switch calculates the current requirements of the terminal device. Using the results from this test, it will categorize the devices into one of two standards.
The IEEE 802.3af
2003 is the first PoE Standard. As per this standard, a device connected to the port of the PoE Switch can draw a maximum of 15.4 Watts from the port.
If we consider all the power losses, then the maximum power that a device can draw is around 13 Watts. This is suitable for IP Cameras and Telephones.
IEEE 802.3at
2009 is the latest PoE Standard and is also known as PoE+. PoE Switches with this standard are capable of delivering up to 30 Watts of power to the devices.
Again, considering all the power losses, we can extract a maximum of around 25.5 Watts. Multiline Phones, Display Phones, and CCTV Cameras with PTZ features can make use of this power. Depending on the standard, we can find both PoE Switches and PoE+ Switches.
PoE Switches are compatible with both PoE and Non-PoE devices. What this means is that you can connect PoE and Non-PoE Devices to a PoE Switch. The switch will determine beforehand whether the device needs power or not. Regular CAT5/5E or CAT6/6A cables are suitable for connecting PoE Devices to a PoE Switch.
Benefits of PoE Switches
- Reduced Costs. PoE eliminates the need to run additional power cables to devices, saves costs on power cables, power outlets, and infrastructure equipment required for electrical installation. Ethernet cables cost less and are often already installed in buildings. If not already installed, remote installation costs less than fiber because no electrician is required.
- Adaptability. You can easily move PoE-powered devices to locations without power outlets. This placement enables devices to reach difficult-to-access areas or locations farther from a power source. One example of this is security cameras, as power outlets are rarely available above ceilings.
- Maximize Power Resources. A PoE switch can automatically detect power consumption by PoE powered devices and supply on the required amount of power. This ability to allocate power minimized power waste and helps businesses save money.
- Enhanced Network Management and Control. POE network switches offer enhanced network management and control capabilities. Through the use of a centralized power source, you can remotely monitor and control the power consumption of individual devices. This feature enables better energy management and allows for troubleshooting and power cycling without physically accessing each device. You can easily manage and control networking devices powered by POE, which makes network maintenance and operations more efficient.
What is a Non-PoE Switch?
Non-POE switches are traditional network switches that do not have the built-in capability to deliver power over Ethernet cables. People typically use them in environments where POE is not required or alongside separate power sources for devices. Businesses often use these switches with industrial Ethernet switches to build a comprehensive network infrastructure.
Benefits of Non-POE Switches
- Lower Cost. They generally come with a lower price tag compared to their POE counterparts. Non-POE switches are a budget-friendly option, especially when you don’t anticipate needing POE capabilities for all your network devices.
- No Power Limitations. Since it doesn’t supply power, there are no restrictions on power output per port.
- Less Heat Generation. Since power is not transmitted, these switches produce less heat, improving longevity and reliability.
Considerations when Choosing between POE and Non-POE Network Switches
Power Requirements of Network Devices
Before making a decision, consider the power requirements of your network devices. If most of your devices support POE, opting for a POE network switch makes sense. On the other hand, if your devices do not require POE and you have a mix of POE and non-POE devices, a non-POE switch will suffice. This consideration helps ensure that you choose the right switch to meet the power demands of your network devices.
Future Expansion and Scalability
Think about your network’s future growth and scalability. If you anticipate adding more network devices that require POE functionality, it might be wise to invest in a POE network switch from the start. This ensures that you have the power capacity and flexibility to accommodate future expansion without the need for additional infrastructure upgrades. Network switches with POE capabilities provide a scalable solution to support the increasing power demands of your network
Integration with Existing Network Infrastructure
Consider how well the switch will integrate with your existing network infrastructure. If you already have non-POE switches in place and replacing all of them is not feasible, a non-POE switch would be the logical choice. However, if you’re starting from scratch or your current infrastructure allows for seamless integration, a POE switch can offer significant advantages. Industrial Ethernet switches that support POE can be seamlessly integrated into existing network setups to provide power and data connectivity in a single solution.
Conclusion
Both PoE and Non-PoE switches serve essential functions in networking. A PoE switch is ideal for powering network devices efficiently, while a Non-PoE switch is best for cost-effective data transmission. Understanding your network requirements will help you select the most suitable switch for your needs, ensuring a reliable, scalable, and cost-efficient network.
