This winter’s phenomenon popularly known as a “polar vortex” has kept many of us around the world under a blanket of snow and ice and well below freezing temps.
Crônicas sobre cabeamento
While the most common causes of failures in twisted pair cabling include installation errors, defects found in poor-quality components (cables, connectors, patch cords, etc.), damage to the installed cable and incorrect tester set up, sometimes technicians want to know specifically WHY a link failed.
Based on which performance parameter failed testing, there are specific possible causes that a technician can consider. Let’s take a closer look.
Failures of the Five Wiremap Tests
If you recently attended the BICSI Winter Conference in Orlando, picked up an industry publication or participated in a webinar, you’ve probably been exposed to plenty of information on PoE and its effect on cabling plants. By now, you may even be tired of hearing about heat rise in bundles of cables that are delivering remote power to devices and how this can cause insertion loss, degrade the cable and impact Ethernet transmission.
Expert Profile: Vangie Michenzi, Senior Fiber Optic Project Manager, Advanced Communication Technology Services
Part 1 of a three-part series
Even though their work is essential to today’s world, you don’t hear much about the professionals who build and maintain the world’s communications networks. While their exploits may not have the wide interest of reality TV stars or politicians, I bet that you, like me, find them a lot more interesting. Tune into the Cabling Chronicles and follow along with us as we share #CablingStories from around the world.
Quando se trata de testar uma instalação de cabeamento, essencialmente há três opções, verificação, qualificação e certificação.
Embora alguns recursos se sobreponham entre as ferramentas de teste conforme você sobe a escada hierárquica da verificação para certificação, cada tipo de teste responde a uma das questões seguintes para ajudá-lo a fazer a escolha certa.
O cabeamento está conectado corretamente?
Aprenda com os especialistas na Conferência de Inverno BICSI!
Planning to attend the upcoming BICSI Winter Conference & Exhibition on January 20 - 24 at the Gaylord Palms Resort & Convention Center in Orlando, FL?
Fluke Networks’ experts will be offering plenty of educational opportunities to learn all about PoE, fiber best practices and how to make sure your next singlemode fiber project is on the right path.
Insertion loss, or the loss of signal that happens along the length of a fiber optic link, is expressed in dBs and should always be a positive number. But it can be negative (which isn’t a good thing).
Return loss, which measures the amount of light reflected back toward the source, is also expressed in dBs and is always a positive number. A high return loss is a good thing and usually results in low insertion loss.
Reflectance, which also measures reflection and is expressed in dB, is a negative number. High reflectance is not a good thing.
Fiber optic connectors include plugs that feature a protruding ferrule that holds the fiber in place and an associated adapter for aligning and mating fibers to form a connection point. The first ferrules introduced in the 1970s were comprised of metal or a hard plastic, and then in the mid-1980s, the introduction of the ceramic ferrule improved alignment and allowed for lower insertion loss.
While neatly combed bundles of cables might look really nice in exposed overhead cable trays and in racks and cabinets, this aesthetically pleasing deployment isn’t always a thing of beauty when it comes to performance.
Sometimes this can be hard to explain to your customers who seem to care more about how the cable looks versus how well their data transmits.
Some Things Are Better Kept Natural