For jumpers, an important performance is the performance problem when bending. Since UTP twisted pairs are generally solid cores, they are poor in manageable performance. First, the cable is relatively hard, which is not conducive to bending. Second, the solid core cable will have obvious return loss when it is bent, which will cause the performance of the cable to decline. Therefore, the solid core cable generally has a bending radius of clear requirements. For flexible cables with multi-strand cores specially used to manage jumpers, these problems are not present.

As an important part of the wiring system, the jumper wire has not been paid attention to. The test problem of jumper is only mentioned in the standard in the past two years.

①TIA/EIA-568-A-4-1999: Propagation Delay and Delay Deviation Specification for 100 Ohm 4-Pair Cable

②TIA/EIA-568-A-5-2000: 100 Ohm 4-pair Enhanced Category 5 Wiring Specifications

③TIA/EIA-568-B Part 2: 100Ω balanced twisted pair component standard

Several successively published standards deal with the jumper test methods and requirements of Ca.5 and Cat.5e respectively. The TIA/ELA-568B.2-1 six types of wiring standard have made specific requirements for the jumper.

The original jumper has a rigorous process and is designed with multi-strand flexible wires, which can withstand repeated plugging and unplugging times.