PoE, or Power Over Ethernet, is a common term used in reference to devices that can be powered via a properly enabled switch or router. PoE enables both signal and power to be transmitted over a single Ethernet cable, eliminating the need for installation of electrical receptacles and power supplies that would otherwise be required to power certain devices.
PoE, also referred to as IEEE 802.3af, was the first standard ever developed for powering a device via ethernet. This standard enabled up to 15-watts of power to be transmitted over a single Ethernet cable. The newest standard, IEEE 802.3at or PoE+, enables up to 25-watts of power to be transmitted over a single Ethernet cable. Each PoE device needs to be connected to a PoE or PoE+ network switch or router that does require a direct electrical connection to an outlet. PoE and PoE+ devices can be used with either PoE or PoE+ switch or router but will be limited by the standard of the device or the switch/router. For example, a PoE+ endpoint speaker can be connected to a PoE switch but it will only be able to get the maximum power the PoE switch is able to deliver, 15-watts. Consequently, a PoE endpoint speaker can be connected to a PoE+ switch but it will only get the maximum 15-watts that the endpoint is capable of receiving.
Many AtlasIED IP enabled endpoints have integrated amplifiers that are able to take the signal from the Ethernet cable as well as the power from the PoE/PoE+ switch and covert that into output power to drive the attached speaker via the onboard amplifier. A PoE+ IP enabled endpoint speaker will thus be able to generate more output than a PoE IP enabled endpoint speaker. This is important for larger areas or areas that have more ambient noise. This is why a PoE+ IP enabled endpoint speaker is a better choice than a standard IP phone. The speaker can cover much greater areas or overcome higher noise levels in order to make sure the message is heard intelligibly. It is important to remember that longer Ethernet cable runs will deliver less power from the switch as some of that power will be reduced over the length of the wire.
Endpoint IP-to-Analog Gateway Controllers
VoIP Paging Servers
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