Power over Ethernet, or PoE, is a time-saving and money-saving technology that distributes power and data safely over an Ethernet cable to a targeted network or device. In the current market, if you take notice of switch types, you will find that there are PoE switch and also PoE+ switch. But what are their distinctions? How much do you know about them? In this article we have rounded up some knowledge to help you better understand PoE switch, PoE+ switch and their respective benefits according to different applications.
PoE vs PoE+ Technology
PoE was firstly defined in IEEE802.3af standard and upgraded to IEEE802.3at which is known as PoE+. PoE switches utilize PoE standard that can supply a maximum of 15.4 watts of DC power per port. While IEEE802.3at increases the maximum amount of power to 30 watts. However, some power will be lost over the length of cable. The minimum guaranteed power available at the PD (powered device) is 12.95 watts per port for PoE and 25.5 watts per port for PoE+.
- Can PoE Devices Work Over PoE+ Ports, or Vice Versa?
The PoE+ standard provides support for legacy PoE devices, meaning that an IEEE802.3af powered device (PD) can operate regularly when connected to IEEE802.3at (PoE+) power sourcing equipment (PSE). But PoE+ PDs require more power than PoE PSEs can provide, PoE PSEs can only supply power to PoE PDs in consequence.
PoE Switch vs PoE+ Switch: What Is the Difference?
| Attribute | PoE | PoE+ |
| Standard | IEEE802.3af | IEEE802.3at |
| Max. Power to PD | 12.95 Watts | 25.50 Watts |
| Max. Power Delivered to Switch | 15.40 Watts | 30.00 Watts |
| Max. Power Consumption | 130W | 250W |
| Voltage Range to PD | 37.0-57.0V | 42.5-57.0V |
| Cabling | Cat3&Cat5 | Cat5 |
PoE Switch vs PoE+ Switch: Selection Dilemma?
Many users may run into this problem. Should I choose PoE or PoE+ switch?
- When to Choose PoE Switch
- When to Choose PoE+ Switch
If you want to invest in modern and advanced technological systems like VoIP, IP Cameras, Video Conferencing System (VCS) and etc, you should go for PoE+ switch. It provides dynamic power allocation, optimized power distribution and supreme power-supply utilization. IEEE standards require that PoE+ utilizes a Cat5 cable only which lowers the chance of possible impedance and reduces power dissipation.
Conclusion
PoE switch and PoE+ switch rationalize both of the processes of powering and providing data to the devices, which make them become straightforward and reliable equipment. In a word, for home network, a simple and cost-effective PoE is adequate. For business network, the PoE+ can support a more complete range of network devices. For more reliable 24 port PoE switch and48 port PoE switch, FS would be a good choice.