LINOVISION PoE and Long Distance PoE Solutions

Amo Chen

Power over Ethernet (PoE) technology has been using Cat 5e/Cat 6 Ethernet cables to transport electric power over a single data connection for years. This technology allows for a safe and responsive installation that does a great job collecting data as well as transmitting power, all at a reasonable cost.

PoE helps power such nodes and devices as VoIP phones, wireless access points, LED lighting systems, surveillance products, industrial controls, and network switches, using just one Ethernet cable. In fact, PoE powers at least a third of Internet of Things (IOT) devices, which today number in the billions. Smart homes, IP security systems, digital signs, and accuracy monitoring sensors in industrial settings all benefit from PoE technology. One of the main benefits of PoE is the labor cost savings experienced by not having to run separate electrical lines and outlets everywhere a device needs to be powered.  And many people or businesses use PoE when they need to connect to an outdoor power source since it’s safer than standard electrical cabling.

PoE does have some limitations, however. These primarily relate to transmission distance, device compatibility workarounds, and power delivery rates. PoE’s transmission distance is limited to 100 meters (about 328 feet), which often proves ineffective for the needs of many potential users. The problem with short transmission distances doesn’t arise with the powered cable itself.  An Ethernet cable can transmit power much further than 100 meters.  A typical 23 or 24 AWG copper cable is actually limited by the test equipment used.  Testers are designed to test only up to 328 feet (100 meters) and not exceed that limit.  They will indicate a failure if the transmission distance exceeds that length, even if the signal continues to transmit beyond this limit.  Therefore, a limiting factor in short transmission distances is also the test equipment itself. 

So distance limitations come from the Ethernet cabling standards and the test equipment itself, as well as poor quality cable. These limitations require users to be creative and find new powered cable solutions for extended distance cabling.

How Far Can a PoE Cable Run?

A single PoE cable is limited to 100 meters, but PoE itself can power any device at any distance, provided enough power is generated at the source to operate the unit on the other end of the cable run. The true distance a PoE cable can run depends on the voltage required to operate the device to be powered and the quality of the cable itself. Most users rely on a Cat 6 cable for longer runs and a Cat 5 for shorter ones. The power supply for a short run typically needs to be 24V, while a long run usually needs 48V. Otherwise, the cable will not carry enough power to operate the desired device.

Do You Need Special Cables for PoE?

Regular and PoE-enabled local area networks both use the same kinds of cables, so special cables are not required when using PoE technology. Usually, a Cat 5e or better standard cable that includes four twisted pairs of copper cable will work. For comparison, electricity only needs two pairs of cable—a negative pair and a positive pair.

PoE cables also need temperature ratings higher than 60 degrees Celsius. Acceptable cables come in 60-, 75-, or 90-degree ratings, with the ratings referring to the temperatures the insulation can withstand. A higher rated cable can power a larger device, as it can effectively withstand the heat generated by the additional power transmission. Acceptable cables may also use different conductor sizes. As with the heat ratings, the bigger the conductor, the more power the cable can relay.

What Wires Carry Power over PoE?

The magic of PoE is basically this—the wires within the cable can carry data and power simultaneously without you as the user needing to modify the existing Cat 5 Ethernet infrastructure. With 10Base-T and 100Base-TX cables, two of the four wires get used. This means power moves along the same wires as data, similar to the phantom power technique in which a common voltage gets applied to each pair. In 1000Base-TX cabling, sometimes referred to as gigabyte Ethernet, all four wires transport data.

What Is a PoE Extender?

If you need to run Ethernet LAN signals farther than 328 feet, one option is to use a PoE extender. These were developed in 2005 in order to extend long distance power to devices such as PoE Wi-Fi access points and PoE IP cameras. Consumers liked these extenders because they helped lower the cost of installing PoE Ethernet devices. PoE extender solutions usually stretch up to about 4,100 feet from your source, or more than 12 times as far as a single cable alone. Fortunately, PoE extenders are not difficult to use. In general, it’s just plug-and-go technology. The extenders usually work so seamlessly that the user may never know it’s there.

Problems with PoE Extenders

While PoE extenders seem to be a great solution, one significant issue related to their use is the addition of another termination point (connector) to the channel.  This can create one too many points in the channel, resulting in excessive noise and insertion loss, which will degrade the signal and render the cable inoperable.

BICSI installation standards are defined by TIA/EIA-568-C which defines a limit on the number of connectors used in the channel between the MDU (rack) and the connected device. 

Introducing LINOVISION Long Distance 1000m PoE Solution.

A newer, more exciting trend to extend distances beyond PoE’s 100-meter limit is to use powered cabling solutions instead of an extender. That’s why we’ve introduced LINOVISION Long Distance PoE solutions help you extend power across extended distances. Our solutions can work in large-scale settings, including large buildings, government facilities, transportation facilities, and college campuses. In these environments, here as below are 3 Long Distance PoE solution in detail:

Solution 1: PoE Power + Data Transmission over twist pair cables:

cdac

Solution 2: Ultra long reach POE power + Data transmission over Cat5e or Cat6 cable:

fdg

There are some situations that users need to transmit PoE power and data over ultra long distance, for example, power a remote security camera from 500 meters (or 1,640ft) away (from one building to another building), or supply power to a PoE IoT device from one side to another side of an underwater tube. The regular PoE extender will extend 100 meters only. With LINOVISION innovative EOC solution, it makes this possible to transmit PoE power and data over max. 1,000 meters (or 3,300ft) through regular Cat5e or Cat6 cable, this will reduce thousands of dollars in cabling cost.

Solution 3: Combine with EOC & POE Hybrid Switch to provide ultra long reach POE power + Data transmission for multiple POE/IoT device:

gvfgdfg

For the sites that require multiple ports of long reach POE transmission or POE IP over coax transmission, it is strongly recommended to use EOC Transmitter and EOC-Switch, which is an EOC & POE Hybrid Switch. EOC Switch is an industrial POE Switch with built-in EOC receiver modules. It will auto detect the PoE load device and determine the EOC mode of regular POE mode. When the port is in EOC mode, it will transmit PoE power and data over max. 1,000 meters (or 3,300ft) through regular Cat5e or coaxial cable (EOC adapter is required), this will reduce thousands of dollars in cabling cost. 

続きを読む→

2021 New Upgraded Version of LINOVISION's POE IP Over Coax Converter

Amo Chen
2021 New Upgraded Version of LINOVISION's POE IP Over Coax Converter provides higher stability and quality in daily application. Each pair comes with 2 BNC to twist pair connectors, which enables POE/IP over twist pair. It's ideal for surveillance solution in elevator cart: One passive EOC-transmitter will be put inside the elevator cart to feed camera or signal board, and one EOC-receiver will be in the control room, powered by POE switch/POE injector/POE NVR. It supports 100Mbps bandwidth over 330ft regular twist pair cables while 10Mbps over 1485ft for both POE or NON-POE devices.

続きを読む→

HD1080P Auto-tracking Live Broadcasting Camera

Amo Chen

LINOVISION's LiveTracker 2 is a unique pro-quality versatile all-in-one auto-tracking camera, designed for live event broadcasting applications. It captures HD1080P video, encoding to IP network, and streaming directly to video platforms, like YouTube, Facebook, Wowza, etc.

RTMP STREAMING Directly to YouTube/Facebook/Wowza

続きを読む→

Industrial 8-Port Full Gigabit POE Switch for Solar System

Amo Chen

LINOVISION‘s 2021 new released 8 port full gigabit one-key ring industrial unmanaged switch allows wide voltage input(DC 12-48V), which enables 12V/24V DC solar power input. It provides 8*10/100/1000Base-T Ethernet PoE port and 2*1000Base-X SFP slots. It supports auto speed reduction on Ethernet ports, the transmission distance is up to 200 meters(660ft) max. Support IEEE 802.3af/at and PoE Watchdog, realizing the function of PoE camera drop detection & automatic reboot, which reduces maintenance costs.

8 Port Gigabit Solar POE Switch

For more information...

続きを読む→

What is PoE Ethernet-over-Coax?

Amo Chen

As old coax CCTV surveillance system getting old and the IP system being more popular,If you want to upgrade analog system to IP surveillance system while using existing coaxial cable.the Ethernet-over-Coax(EOC)technology is the best way for you. 

eoc conventer

 How does Ethernet-Over-Coax Works?

In short, Ethernet-over-Coax allows you to transmit digital IP signals, normally carried by an Ethernet cable, over the analog coax cables already have. It does this by using two special Ethernet-over-Coax converters(transmitter and receiver) – one allowing you to connect the network camera to the coaxial cable itself, and another allowing you to connect the coax cable directly to the IP network. IP cameras are widely known to have a wider variety of features and benefits, and more powerful capability, than analog cameras, and Ethernet-over-Coax allows you to make use of those features without needing to make a massive switch to an entirely-digital system.

PoE over Coax guide page

 What are the benefits of Ethernet-Over-Coax ?

The most obvious benefit of ethernet-over-coax is that it simply makes the upgrade to IP cameras much easier and cheaper, as you don’t need to rip out any existing wiring in the walls, which drives up installation time, cost and hassle. IP cameras can essentially just be attached to the network in an almost plug-and-play fashion.

Once hooked up, you’ll be able to use virtually all the functions and features generally associated with IP cameras, such as increased resolution, faster speeds, and PTZ functions.

Ethernet-over-Coax also works with Power-Over-Ethernet (PoE), allowing you to supply power over your previous systems existing coax cables, giving you even more flexibility and capability. For example, by properly connecting to a PoE switch, you get all the features and efficient power management that PoE generally provides. You can even add extra local power to the adapter, allowing the system to power even higher-power cameras. (Power-over-Coax technology does exist on its own, but you it’s still rare to find in most security system setups, due to little need for it).  LINOVISION EOC Converter

Below is the system topology

EOC application

続きを読む→