Shielded cabling system includes tool-less jacks

Paul Boughton
System designers need to deal with problems of signal ingress and egress caused by electromagnetic interference (EMI). EMI and RF (radio frequency) interference has a negative impact on signal transmission performance and reliability. Poor shielding can result packet losses, decreased bandwidth and connection losses. Shielded cabling systems provide increased immunity against high-frequency noise.
Effective shielding can protect cables from signal ingress or egress, as well as triboelectric or other mechanical noise. With a growing need for more sophisticated shielding, system designers need to find the right shielding system for each application. Belden says its shielded systems deliver superior performance against EMI and RF interference with maximum shielded effectiveness, as well as high reliability.
Prior to introducing these new systems, Belden conducted extensive internal testing in line with relevant standards. Tests covered over 100 different cabling configurations, including short links, long links, worst cases and most demanding four-connector channel configurations. These tests were performed at frequencies of up to 25MHz. All transmission parameters were tested, including attenuation, Next, Fext (near-end and far-end cross-talk) and return loss. The test results proved very good and consistent matching of components and excellent end-to-end performance. Moreover, these systems have been externally verified in both channel and link configurations by Delta laboratories in Denmark.
At the heart of the 'Belden Shielded Solutions' is a shielded tool-less modular jack that is described as high quality and easy to install. The Keyconnect Modular Jack helps to reduce installation time and provides superior shielding performance without compromising the size and ease of use of the UTP connector. The modular jack comes with a termination cap to prevent the untwisting of the pairs and endure the integrity of the transmission performance. Other components of the system include: Belden Category 6 and 5 e cables for networks where noise and interference is high; modular cords and pigtails for optimum electrical performance at component level; and 24- or 48-port Keyconnect Shielded Patch Panels for horizontal distribution or equipment terminations in data centres and telecommunications rooms.
Introducing the new systems Andy Kuszczak, the product manager for Belden EMEA, comments: "Belden can now deliver the systems applicable for high-noise environments, including offices and hospitals. This new range delivers Belden quality, performance and reliability - with the added benefit of tool-less termination."
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