Executive standard: ANSI/EIA/TIA-568-B.2-2001; Structure:Single-stranded bare copper wire; polyethylene (PE) insulated; two insulated conductors twisted into pairs; polyester film and weather-resistant black PE or PVC/LSZH (Low Smoke Zero Halogen) jacket. The product is applicable to the auxiliary main line system and open offices. Range of application: Support 10 Base T, 100 Base T, ATM Ethernet, Token Ring TP-PMD voice, telephone, multimedia and other types of network applications; its transmission performance is equivalent to that of 4-pair horizontal cables. Technical parameter: Frequency(MHz) 1 4 10 16 20 31.25 62.5 100 Attenuation(dB/100m) 1.9 4.1 6.5 8.2 9.3 11.7 17 22 NEXT(dB) 69 56.3 50.3 47.2 45.8 42.9 38.4 35.3 PS NEXT(dB) 68 53.3 47.3 44.2 42.8 39.9 35.4 32.3 ELFEXT(dB) 67.5 51.8 43.8 39.7 37.8 33.9 35.4 32.3 PS ELFEXT(dB) 68 65 55 50 46 44 38 34 Return loss(dB 26 29 30 30 30 30 28 27