Question: What Is The Difference Between 802.3 AF And 802.3 At?

The big difference between 802.3af (PoE) and 802.3at (PoE+) is the amount of power delivered over each standard.

802.3af (PoE) can deliver 15.4 watts over Cat5 cables.

802.3at (PoE+) can deliver up to 30 watts over Cat 5 cables with 25.5 watts available to devices.

What is PoE 802.3 at?

The IEEE 802.3af (PoE) standard supports the delivery of power over Ethernet up to 15.4W per port that may be used to deliver power to a variety of devices.

What voltage is 802.3 af?

Standard implementation

Property 802.3af (802.3at Type 1) “PoE” 802.3bt Type 4
Power available at PD 12.95 W 71 W
Maximum power delivered by PSE 15.40 W 100 W
Voltage range (at PSE) 44.0–57.0 V 52.0–57.0 V
Voltage range (at PD) 37.0–57.0 V 41.1–57.0 V

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What is difference between PoE and Poe+?

One difference between PoE and PoE+ is the actual Institute of Electrical and Electronics Engineers (IEEE) standards themselves. PoE is 802.3af, while PoE+ is 802.3at. Currently, the max amount of power provided over Cat5 cabling is 15.4 watts for PoE and 25.5 watts for PoE+.

What voltage is PoE +?

48 volts

Is PoE 24v or 48v?

If your PoE device uses the PoE standard 48V 802.3af or 802.3at, it is considered to use active POE. This includes devices such as cameras and radio antennas that run on 24V PoE.

How far does PoE work?

PoE can transmit 100 meters from the switch or hub to the NIC, regardless of where the power is injected. The limitation is not the power; it’s the Ethernet cabling standards that limit the total length of cabling to 100 meters.

What is the maximum distance for power over Ethernet?

100 metres

What is a PoE switch used for?

A POE switch is a network switch that has Power over Ethernet injection built-in. Simply connect other network devices to the switch as normal, and the switch will detect whether they are POE-compatible and enable power automatically.

What is HPoE?

Power over Ethernet is an extension of the same concept used in the telephone industry, where voice and power are applied to the same cable. The second standard, ratified in 2009 as IEEE 802.3at, is commonly called high power PoE (HPoE) or PoE+ and doubles the power capabilities to 30 watts.

Can PoE damage devices?

But it can result in severe damage to non-PoE-compliant Ethernet devices if they are connected accidently, possibly costing thousands of dollars. Perle says that it is now offering the only extenders that comply with IEEE 802.3af/at and will thus allow both PoE and non-PoE devices to be attached safely.

Does PoE work over cat5e?

As well, all support Power over Ethernet (PoE). Otherwise, each cable has a different standard. Cat5e (Category 5 enhanced) is the least expensive, but also the slowest. Certainly, it will provide capable performance for most of today’s applications, but Cat5e also leaves less opportunity for upgrading in the future.

Do I need PoE switch?

What if I Need More Power? If your network switch doesn’t support PoE, or provides less PoE power than you need, there’s a way to get more: use a PoE injector (sometimes called a PoE adapter). PoE injectors sit between your Ethernet switch and the device you want to connect but plug into their own power source.

What voltage does a PoE switch put out?

POE can be anything up to 48 volts. While there are some standards (802.3af), there are many systems which run lower voltages – 12 volts is common. 802.3af can push out about 15 watts – which is quite a lot.

How does PoE work with gigabit?

The Gigabit Power over Ethernet Injector, model TPE-113GI, combines electrical power with a Gigabit network connection to produce a Gigabit Power over Ethernet (PoE) signal. Connect this device to a non-PoE switch and then run an Ethernet cable for up to 100 meters (328 Ft.) to network PoE devices.

How long is PoE cable?

Cat6 cable is recommended for long POE runs. For passive POE you should use a 24V power supply. 24V passive POE will power an OM series AP up to about 50 meters or 100-150 feet. 48V 802.3af standard POE can usually go about 100 meters/300 feet.