How Much Do You Know About PoE?

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People’s increasing demand for more
data traffic and higher data speed promotes the evolution of communication
technology. The size of data center becomes larger and cabling system becomes
more complicated. Recently, home network deployment springs up and a new
network technology becomes a hot spot topic—PoE (Power over Ethernet). How much
do you know about it? Do you use PoE devices? This article will focus on things
related to PoE.

 

PoE

PoE technology allows network switches
to transmit both power and data through an Ethernet cable at the same time.
Take digital security camera for example. A digital security camera normally
requires two connections to be made when it is installed: a network connection
and a power connection. The former one makes the camera communicate with video
recording and display equipment, while the latter one delivers the electrical
power for the camera. However, if the camera is POE-enabled, only the network
connection needs to be made, as it will receive its electrical power from this
cable as well. Some equipment in home network usually use PoE, such as VoIP
phone, IP camera and wireless access point.

 

PoE+

If you use PoE devices, you must have
noticed that there are PoE+
devices on the market. What is the difference between them? PoE devices
utilize the original PoE standard, IEEE 802.3af, which provides up to 15.4W of
DC power to each device. While PoE+, also known as PoE class 4, is the latest
standard, IEEE 802.3at, which provides up to 30W of power to each device.
That’s to say PoE+ can provide almost twice as much power as PoE over a single
Ethernet cable. High-powered IP devices such as PTZ cameras use PoE+. In
addition, compatible NVRs use integrated PoE+ ports to provide power and PTZ
commands to the camera, as well as video connection to the NVR.

 

Reliability: PoE power comes from a
central and universally compatible source, rather than a collection of
distributed wall adapters. It can be backed-up by an uninterruptible power supply,
or controlled to easily disable or reset devices.

 

Scalability: Having power available on
the network means that installation and distribution of network connections is
simple and effective.

 

Conclusion

PoE technology realizes the power and
data transmission over the same Ethernet cable at the same time, which makes
home network deployment more convenient. fiber-mart.COM provides high quality
PoE switches and all of them come with a one-year limited warranty, including
any quality problems during the free maintenance.