Category: Copper Networks

How to Lower Cabling Temperature for PoE?

Popular speaking, PoE (Power over Ethernet) is a technology that lets network cables carry electrical power. Recently, PoE has made great strides because it has shown its great advantages such as saving time and cost, flexibility and reliability. As a result, cabling for PoE is at the explosive growth rates. But there is a problem in the cabling when power is added to balanced twisted-pair cabling. The copper conductors generate heat and temperatures could rise, which may lead to higher insertion loss and in turn shorter permissible cable lengths. So, how to lower cabling temperature for PoE? Here are some advice below.

Reduce the number of cables per bundle – If the cable bundle is too big or tight, the temperature will be higher. TIA (Telecommunications Industry Association), has done an experiment about whether the number of cables can influence the temperature. First, they tested the temperature of a bundle of 91 cables, and then they equally separated this cable bundle into three bundles and tested the temperature of each bundle. The results showed that the temperature of the 91 cable bundle is much higher than the smaller three cable bundles. In order to keep the result precise and reliable, they divided the three bundles into smaller bundles, and the result turned out to be the same. So a conclusion can be reached: Separating large cable bundles into smaller bundles or avoiding tight bundles will minimize higher temperatures.

Use higher category cabling – Higher category-rated cable typically means larger gauge sizes, and as power currents increase, these larger conductors will perform better than smaller cable. There is a picture below which shows the different temperature of different category cables with the cable bundle size increased. From this picture, we can see that higher category-rated cable is capable of more stable performance as it can allow for larger bundle sizes under the maximum 15-degree temperature increase. The allowable bundle size was 52 cables for Cat 5e, 64 for Cat 6, 74 for Cat 6A, and a similar increase for Cat 8.

different temperature of different category cables with the cable bundle size increased

Install Shielded Cabling – There is a comparison between Unshielded Twisted Pair (UTP) and Foiled Unshielded Twisted Pair (F/UTP). The samples of cable were tested carrying a PoE+ current of 600 mA per pair over all 4 pairs at an ambient temperature of 60 degrees Celsius. Each cable type was coiled into a separate 90 meters length and terminated with jacks at both ends. They then applied the current while monitoring the temperature rise of the bundle. After testing, they found that UTP cable performed worst, as it required more than 9 meters of length to be removed before it returned a passing insertion loss result. While the F/UTP performed significantly better, for it can pass at less than 90 meters. The difference between the performance lies in that UTP cable has no shield or isolation wrap barrier between the insulated conductors and the outer cable jacket material. In turn, there may be an interaction that changes the dielectric constant around the conductor and contributes to greater attenuation at higher temperature.

In a word, lower cabling temperature for PoE can be benefit to reach a high quality connectivity that is a crucial part in a flexibility and reliability network. The advice introduced above will help you lower cabling temperature for PoE. In addition, Fiberstore, one of the most famous telecommunication equipment manufacturers in the world, has devoted itself to deliver the products of highest performance for cabling systems and offer the best assemblies for fiber optic connectivity, which can help you to receive maximum return on infrastructure investment.

Originally published at http://www.chinacablesbuy.com/how-to-lower-cabling-temperature-for-poe.html

Ethernet Over Fiber Compared To Copper Cables

Although Ethernet technologies have been used since the 1970s within LANs, it just recently has been around us like a wide area network transmission medium due to the development of fiber optic technology. With communication technology inching its way forward, fiber optic cable is slowly taking over the cable technology by replacing copper cable as a way of communication signal transmission. There are many benefits of converting to Ethernet over fiber when compared to traditional copper wires or cables.

The main advantage is the fact that when compared with copper cables, Ethernet over fiber can provide 1000 times more bandwidth covering a distance which is 100 times farther, which is a major step forward when compared with traditional forms of accessing bandwidth. With fiber optic’s unlimited bandwidth, it may communicate information more dedicatedly. As a result, you can imagine the rate from the connection which goes in circles around the bandwidth assigned. Ethernet for broadband can be delivered over fiber optic cables installed throughout an entire building which could substantially reduce normal provisioning time for clients residing in that building. Fiber optic cable also provides you the opportunity to expand your bandwidth and have new technologies like MPLS, DWDM, etc.

Since fiber optic cable is based on glass, it doesn’t conduct electrical current. Hence, that you can do away with grounding. It’s also protected against electromagnetic interruption like lightning. Fiber optic cable uses light pulses which make it convenient to use outdoors and close to electrical cables. It is not prone to water and chemicals as it is made of glass. Therefore, it cannot be damaged by abrasive elements. Therefore cuts down on the cost of maintenance of Ethernet. The highest quality technology utilized in fiber optic cables is stronger in comparison with copper cables. This produces high definition picture quality and is devoid of any outside influences.

In case of breakage of fiber optic cables, there is no chance of physical injuries. In contrast to conveying information through electricity, fiber-optics does it through light. There is also no risk of harm because of fire or electrocution. Providers hardly have concerns about hardware failure when they use fiber optics.

Optical fiber can’t be tapped easily as well as if it’s, no light is going to be transmitted. Hence, it is more secure than copper wires. Although, Ethernet isn’t available everywhere, it is still a cost effective option at places where it is obtainable. Whether for a small office or a large setup, it is an economical and practical solution. With regards to speed, fiber optic cables can transmit good signals over 10GB per second.

Surely, the advantages of converting to Ethernet fiber optic cables are enormous. With cutting edge technology in your hands, data communication isn’t restricted by distance and you may possess the best quality transmission for the phones, Internet and television. Ethernet fiber optic cable has been a great development in telecommunications. It has a lot of positive features. Telecom companies do not need to disrupt or divert your phone, Internet or television services when they upgrade their relays or to make repairs. You get non-stop, fast and clear signals.

As Ethernet over fiber became the most commonly used technology, an Ethernet patch cable is needed for the purpose of interoperability between several electronics. Ethernet patch cable is almost just like an optical or electrical cable that is needed when connecting one optical or electrical device to another with regards to routing signals. Once the two devices that should be connected and therefore are dissimilar you may need a patch cable. Ethernet patch cables can be split into fiber optics patch cords with fiber connectors (LC LC patch cable, SC-SC patch cord, ST connectors fiber, etc.) and copper patch cables with RJ45 connectors (CAT5e patch cable, CAT6 patch cable, etc).