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Anleitung Zusammenfassung
All rights reserved. Black Box CAT5e Shielded Twisted-Pair (STP) Patch Cables Pr PrProtect CA otect CAotect CAT5e lines fr T5e lines frT5e lines from noise. om noise.om noise. FEATURES • The cost-effective alternative to fiber optic cabling in high-environments. • Foil shielding protects signals from EMI/RFI. • Reliable performance in extreme climate conditions. • Support 100-MHz or 155-Mbps high-speed communications. • Snagless boots. • Choose from stranded or solid conductors. • PVC and plenum-safe jacketing available. OVERVIEW If you have a high-optic cable is not cost-the CAT5e Shielded Twisted-Pair (STP) Patch Cables up to 150 feet and beyond. What is noise? It is the common interference (EMI) or radio-frequency (RFI). It’s generated by motors, fluorescent and office appliances. EMI and RFI play havoc with ordinary, unshielded copper cables. But the BLACK BOX ® CAT5e STP Patch Cables are built for harsh environments. In fact, they perform temperatures as hot as 176°F (80°C) or as cold These cables are built with protective foil shielding support 100-MHz or 155-Mbps high-speed communications. The patch cables pattern and have slide-They are ideal for applications and ISO/IEC 11801 standards. Choose from two versions, either and a PVC jacket (EVNSL72GY) or with solid jacket safe for plenum installation The EVNSL72GY cables are available (0.9 m) to 20 feet (6 m), and custom lengths The EVNSL73GY cables are available in lengths (7.6 m) to 150 feet (45.7 m). Technically Speaking Shielded vs. unshielded cable. The environment determines whether cable should be shielded or unshielded. Quiet office environments, busy retail establishments, and industrial workshops all require different levels of shielding. Shielding is the sheath surrounding and protecting the wires of the cable from electromagnetic leakage and interference (EMI). This activity is commonly referred to as noise. Sources of EMI in the workplace include elevator motors, fluorescent lights, generators, air conditioners, and photocopiers. To protect your data from high EMI, choose a shielded cable. Foil is the most basic cable shield, but a copper-braid shield provides more protection. Use a foil-shielded cable in busy office or retail environments. For industrial environments, you might want to choose a copper-braid shield. For quiet office environments, choose unshielded cable. Stranded vs. solid conductor. Stranded cable is for use in shorter runs between network interface cards (NICs) and wallplates, or between concentrators and patch panels, hubs, and other rackmounted equipment. Stranded-conductor cable is much more flexible than solid-core cable. However, attenuation is higher in stranded-conductor cable, so the total length of stranded cable in your system should be kept to a minimum to reduce signal degradation. Solid cable is for use in runs between two wiring closets or from the wiring closet to a wallplate. Solid-conductor cable shouldn’t be bent, flexed, or twisted repeatedly. It’s designed for both backbone and horizontal cable runs. Its attenuation is lower than that of stranded-conductor cable. For more information on how to choose the right cable for your application, call our FREE Tech Support at 724-746-5500, 24 hours a day! 724-746-5500 blackbox.com 2of 3 #26011 3 of 3 7/12/2007 #26011 724-746-5500 blackbox.com TECH SPECS Conductor Gauge — EVNSL72GY: 26 AWG, 7/34 stranded tinned EVNSL73GY: 24 AWG, 7/32 solid tinned copper Construction — EVNSL72GY: Gray PVC jacket, ripcord, foam polypropylene insulation, aluminum/EVNSL73GY: Gray plenum polymer alloy jacket, insulation, aluminum/polyester shield with drain Delay Skew (Maximum) — <25 nsec/ 100 m ELFEXT (Minimum/100 m) — EVNSL72GY: 66 dB @ 100 MHz; EVNSL73GY: 63 dB @ 100 MHz Frequency — Up to 100 MHz Impedance — 100 ± 15 ohms NEXT (Minimum/100 m) — EVNSL72GY: 64 dB @ 100 MHz; EVNSL73GY: 67 dB @ 100 MHz PS-ELFEXT (Minimum/100 m) — 63 dB @ 100 MHz PS-NEXT (Minimum/100 m) — 64 dB @ 100 MHz Return Loss (Minimum) — 18.9 dB @ 100 MHz Velocity of Propagation (Nominal) — EVNSL72GY: 71%; EVNSL73GY: 72% Wiring Type — TIA/EIA-T568B Connectors — RJ-45 Item Code CAT5e Shielded Twisted-Pair (STP) Patch Boots, T568B, 4-Pair, RJ-45, Gray PVC, Stranded 3-ft. (0.9-m) EVNSL72GY-0003 6-ft. (1.8-m) EVNSL72GY-0006 10-ft. (3-m) EVNSL72GY-0010 20-ft. (6-m) EVNSL72GY-0020 Custom Lengths EVNSL72GY Plenum, Solid 25-ft. (7.6-m) EVNSL73GY-0025 50-ft. (15.2-m) EVNSL73GY-0050 100-ft. (30.4-m) EVNSL73GY-0100 150-ft. (45.7-m) EVNSL73GY-0150 Recognize any of these situations? • You wait more than 30 minutes to get through to a vendor’s tech support. • The so-called “tech” can’t help you or gives you the wrong answer. • You don’t have a purchase order number and the tech refuses to help you. • It’s 9 p. m. and you need help, but your vendor’s tech support line is closed. According to a survey by Data Communications magazine, 90% of...