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Comparison of common and cross-connect wire jumpers

We all know there is comparison between two similar things. Which is the best or do they have their own features when we used in our daily life? Actually, I think that fiber optic manufacturer in china would give us the comparison of common and cross-connect wire jumpers if we ask them for it.
 
Common jumper (direct line): used to connect different devices, such as PC card and the connection modules, patch panels and wiring closets, patch panels connected to the HUB or switch. RJ45 connectors at both ends of the wiring is the same straight line, use the T568B standard line order.
Crossover cable (crossover cable): to connect the same device, such as connection HUB switch between devices and the like. RJ45 wiring which is not the same at both ends, respectively, using standard T568B and T568A standard, which requires a wiring reversed 1 / 3, 2 / 6 line pairs, and the remaining pairs can still mounted according to correspondence. I think we should better buy it from fiber optic cable supplier as it is connected with our safety when we use it.
In the integrated wiring (online) intelligent management system, also uses a logo jumper, it is actually a complex of multifunctional jumper or jumpers, usually in addition to four pairs of lines, but also added a wire, this wire made of copper or optical fibers, used to connect the appropriate detection equipment for real-time detection and management of cabling systems.
 
There are various new things come into our daily life nowadays with the high improvement of technology. We can look around the market of fiber optic adaptor wholesale and find the product we need. 

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