While Power over Ethernet is a perfect solution for installing security cameras or display screens in remote locations, like parking lots, transportation hubs, or public parks, the limits on signal range can become an issue in many of these locations. Unassisted, PoE maintains signal integrity for up to about 100 meters (329 feet). However, with the assistance of a PoE extender, that limit goes up significantly; the only remaining limit is your creativity.
What are PoE extenders?
A PoE extender increases the possible connection distance between a PoE-powered device (PD) and the PoE switch or injector. Once implemented, extenders allow Devices that require a PoE connection, such as wireless access points and IP cameras, to be placed farther away from the primary PoE source.
Incorporating a PoE extender provides administrators with a far greater degree of flexibility during the design and implementation of their network.
How does a PoE extender work?
A PoE extender acts as a signal booster for PoE. It allows PoE devices to be placed farther from the primary PoE source.
Upon activation, the extender:
- Receives signal from the PoE switch or injector. This signal will include both data and power.
- Separates the data and power components of the signal.
- Boosts the power component of the signal to compensate for signal loss over long distances.
- Recombines the boosted power alongside the data.
- It transmits the extended PoE signal to the PoE-powered device.
With the addition of a PoE extender, your network can meet virtually any distance demand.
How is a PoE extender different from an Ethernet extender?
The main difference between an Ethernet extender and a PoE extender is the power aspect. An Ethernet extender increases the distance of an Ethernet network signal, allowing for data exchange between devices over longer distances, but not power supply.
A PoE extender not only extends Ethernet signals but also provides power over the same Ethernet cable. This advantage simplifies network setup by eliminating the need for separate cables. PoE works well with PDs that require both data and power, such as IP security cameras.
Where do organizations typically implement PoE extenders?
Organizations use PoE extenders anywhere they may need to extend the reach of their PoE network. Some examples include:
- Outdoor environments: PoE extenders can extend the reach of outdoor PoE devices, such as outdoor cameras and wireless access points.
- Industrial settings: PoE extenders can connect industrial devices like sensors or controllers to a central network in warehouses and factories.
- Large buildings: PoE extenders can connect PDs to a central PoE switch in buildings with multiple floors or large spaces without additional power outlets.
- Remote locations: PoE extenders can power devices using existing Ethernet infrastructure in remote locations where providing a dedicated power supply might be complicated or expensive.
What are Some Common Applications for PoE Extenders?
PoE extenders have a wide range of use cases. The most common include:
IP Video
A PoE extender enables the placement of IP cameras in a broader range of locations. It simplifies installation, saves costs, and allows for more straightforward configuration and monitoring of cameras. PoE extenders are often used to support outdoor cameras, which provide data and power even in harsh weather conditions.
Factory Automation Enablement
In factory automation environments, PoE extenders bring connectivity and power to sensors placed in remote or hazardous factory areas, providing real-time data for process monitoring and control. Such systems contribute to a flexible, scalable, and reliable automation system.
CCTV Systems
In CCTV security systems, PoE extenders can offer a more convenient and efficient way to power and connect cameras in roadside sensors, transportation hubs, casinos, municipal buildings, college campuses, education buildings, parks, and more.
Network Retrofits
When existing infrastructure needs to be upgraded to support PoE-powered devices, PoE extenders allow administrators to connect sections of the network piecemeal, eliminating the need for a complete network overhaul.
Transportation Systems
In transportation systems, PoE extenders are used to power traffic sensors, cameras, and digital signage in remote locations along transportation corridors. These systems can power and connect wireless access points in transportation hubs, and power sensors for monitoring air quality, noise levels, and other environmental factors.
Security Cameras and Surveillance Systems
PoE extenders offer an efficient and versatile solution for powering and connecting security and surveillance cameras for deployment in a diverse array of locations, while also offering a more simplified installation process.
Metering Systems
PoE extenders can even simplify the maintenance of metering systems by providing power and data to various metering devices, such as smart meters, data concentrators, and communication gateways.
Outdoor Wi-Fi Access Points
By extending the reach of wireless access points, PoE extenders help to improve network coverage and connectivity across large areas. They can be used in remote locations where it would be difficult or expensive to provide traditional data and power sources, such as parking lots, parks, and across college campuses.
How to Choose the Right PoE Extender for Your Network
For those interested in implementing PoE extenders within their network, a few considerations will help narrow down the search.
Bandwidth determines how far you can extend your Ethernet signal. The higher the bandwidth, the shorter the maximum distance. PoE extenders are designed to work with standard bandwidths, such as 100 Mbps and 1 Gbps. The distance between your PoE switch or injector and the PoE-powered device will be an essential data point when searching for an extender with the appropriate range.
The extender you select should match the power requirements of PDs and must be compatible with the PoE standard (PoE, PoE+, PoE++) used in your network. The number of devices connected is an indication of how many ports you’ll need. Operating conditions should also be taken into account. Temperature, vibration, humidity, and mechanical shock risk will help you determine whether you need a standard PoE extender or one specifically hardened for tough environments.
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