product description: reference standard: ul444, tia/eia-568a bare solid copper conductor rohs complied pvc, pe or lsoh jacket complies to tia/eia-568b&iso/iec 11801 application: 100 base-tx, 100vg-anylan, 1000base-t, atm, noisy environment cable construction: item no.: 1 2 conductor dimension: 0. 574mm 0. 574mm core dimension: 1. 05mm 1. 05mm no. of pairs: 4 4 nom. od: 7. 3mm 7. 3mm type of jacket: pvc pvc remark: 250mhz 550mhz electrical characteristics: frequency(mhz): 1 10 100 250 350 450 550 attenuation(db/100m): 1. 9 5. 9 19. 8 32. 8 38. 9 46. 3 51. 8 impedance(ohm): 100 100 100 100 100 100 100 return loss(db): 20 25 21 18 16 16 15 next(db/100m): 74. 3 59. 3 44. 3 38. 3 36. 2 34. 5 33. 2 elfext: (db/100m): 67. 8 47. 8 7. 8 19. 8 16. 9 14. 7 12. 9 ps next(db/100m): 72. 3 57. 3 42. 3 36. 3 34. 2 32. 5 31. 2 ps elfext: (db/100m): 64. 8 44. 8 24. 8 16. 8 13. 9 11. 7 9. 9 delay skew(ns/100m, max): 45 45 45 45 45 45 45 propagation speed(m/s): 0. 6c 0. 6c 0. 6c 0. 6c 0. 6c 0. 6c 0. 6c