broadconnectauthor2What Is a PoE Switch? How Power over Ethernet Works for Businesses
A Power over Ethernet (PoE) switch allows businesses to connect network devices and supply them with electrical power through a single Ethernet cable. This means compatible devices, such as IP phones and wireless access points, can receive both data connectivity and power without requiring a separate power adapter.
For businesses, PoE can simplify network installations, reduce cable clutter and provide more flexibility when connecting equipment across an office.
But what exactly does a PoE switch do, which devices can use it, and does your business need one? Here’s what you should know.
How Does a PoE Switch Work?
A PoE switch sends network data and electrical power through the same Ethernet cable to compatible devices. This removes the need for a separate power adapter at each device location.
Here’s how it works:
- Power source: The PoE switch connects to the business’s electrical supply.
- Data and power transmission: It sends network data and electrical power through an Ethernet cable.
- Device connection: A compatible device, such as an IP phone or wireless access point, receives both.
- Simpler installation: The device can operate without a separate power connection, provided the switch supplies enough power.
This setup helps businesses reduce cable clutter and install network devices in more convenient locations.
Which Devices Can Use a PoE Switch?
A PoE switch can power compatible business devices while providing network connectivity through one Ethernet cable. Common examples include IP phones, wireless access points and IP security cameras.
1. VoIP Desk Phones
Compatible IP phones can receive power and network connectivity through a single Ethernet cable. This reduces the need for individual power adapters across office workstations. Businesses using Business Phone Systems can consider PoE when planning their phone network.
2. Wireless Access Points
PoE makes it easier to install wireless access points in ceilings, meeting rooms and other locations without needing a separate power outlet at every installation point.
3. IP Security Cameras
Compatible IP cameras can receive electrical power and transmit network data through the same Ethernet cable, simplifying their installation around business premises.
PoE Switch vs Standard Switch vs PoE Injector
The main difference is that a PoE switch supplies both network connectivity and electrical power, while a standard switch provides network connectivity only. A PoE injector adds power to an Ethernet connection for an individual compatible device.
| Device | Main function | Best suited for |
| Standard switch | Connects devices to a network without supplying PoE power. | Businesses using devices with separate power supplies. |
| PoE switch | Provides network connectivity and power through Ethernet cables. | Offices connecting multiple PoE devices. |
| PoE injector | Adds power to an Ethernet connection for a compatible device. | Setups requiring PoE for one or a small number of devices. |
A PoE injector may be sufficient when a business only needs to power one compatible device. However, a PoE switch is generally more practical when connecting multiple IP phones, access points or cameras that require PoE.
What Should You Consider When Choosing a PoE Switch?
Choosing the right PoE switch depends on the number of devices, their power requirements and your business network setup. Consider these five factors before purchasing one.
1. Number of PoE Ports
Check how many devices need PoE connections. Choose a switch with enough ports for your current equipment and some room for future expansion.
2. Power Budget
The power budget is the total amount of electrical power a switch can provide to connected devices. Make sure it can support all your devices running at the same time.
3. PoE, PoE+ and PoE++
These standards provide different power levels:
- PoE (802.3af): Up to 15.4W per port.
- PoE+ (802.3at): Up to 30W per port.
- PoE++ (802.3bt): Supports higher power levels, depending on the type.
Check your devices’ power requirements to choose a compatible switch.
4. Managed vs Unmanaged Switches
An unmanaged switch provides basic network connectivity with minimal configuration. A managed switch offers additional controls, such as monitoring, network configuration and traffic management.
5. Network Speed
Check the Ethernet port speeds and uplink capacity to ensure the switch can support your business’s network traffic and connected devices.
Does Your Business Need a PoE Switch?
A PoE switch can be useful for businesses that need to connect and power multiple network devices without relying on separate power adapters.
Your business may benefit from one if it:
- Uses multiple IP phones across office workstations.
- Needs wireless access points in different areas.
- Is installing or expanding office network infrastructure.
- Wants to simplify device power connections and reduce cable clutter.
However, not every business needs a PoE switch. The right setup depends on the number of connected devices, their power requirements and the existing network infrastructure.
If you’re planning an office network upgrade, explore Broadconnect’s Office Cabling services to understand your connectivity options.
Frequently Asked Questions
1. What does PoE stand for?
PoE stands for Power over Ethernet. It is a technology that allows electrical power and network data to travel through the same Ethernet cable.
2. Can a PoE switch work with normal Ethernet devices?
Yes. A PoE switch can connect standard Ethernet devices as well as compatible PoE devices. Standard devices that do not support PoE will not receive power through the Ethernet connection.
3. Do all IP phones need a PoE switch?
No. Some IP phones support PoE, while others use a separate power adapter. Check the phone’s specifications before choosing a switch.
4. What is the difference between PoE and PoE+?
PoE and PoE+ are different power standards. PoE+ supports a higher power level than standard PoE, making it suitable for devices with greater power requirements. The switch and connected device must support compatible standards.
5. Do PoE switches need a separate power supply?
Yes. The PoE switch itself needs an electrical power source. It then distributes power to compatible connected devices through Ethernet cables.
6. Does a PoE switch improve internet speed?
No. PoE supplies electrical power through Ethernet; it does not automatically increase internet speed. Network performance depends on the switch specifications, cabling, connected devices and internet connection.
Planning Network Infrastructure for Your Business?
A PoE switch can make it easier to connect and power compatible business devices through a single Ethernet cable. From IP phones to wireless access points, it can simplify office installations and support organised network infrastructure.
Choosing the right setup depends on your connected devices, power requirements and future business needs.
Broadconnect helps Australian businesses plan office cabling solutions around their workplace connectivity requirements.
Call: 1300 880 330
Email: hello@broadconnect.com.au
Follow us on Facebook, LinkedIn, and Instagram for updates and offers.