Horizontal UTP Cabling Standard
Attenuation/NEXT Loss (Worst pairs) of 100m. UTP @20 °C
| Frequency | CAT.3 | CAT.4 | CAT.5 | CAT.5e | CAT.5e (dB) | CAT.5e
(dB) |
| (MHz) | (dB) | (dB) | (dB) | (dB) | psNEXT | psELFEXT |
| 1.0 | 2.6/41 | 2.2/56 | 2.0/62 | 2.0/65.3 | 62.3 | 60.8 |
| 4.0 | 5.6/32 | 4.3/47 | 4.1/53 | 4.1/56.3 | 53.3 | 48.7 |
| 8.0 | 8.5/27 | 6.2/42 | 5.8/48 | 5.8/51.8 | 48.8 | 42.7 |
| 10.0 | 9.7/26 | 6.9/41 | 6.5/47 | 6.5/50.3 | 47.3 | 40.8 |
| 16.0 | 13.1/23 | 8.9/38 | 8.2/44 | 8.2/47.3 | 44.3 | 36.7 |
| 20.0 | - | 10.0/36 | 9.3/42 | 9.3/45.8 | 42.8 | 34.7 |
| 25.0 | - | - | 10.4/41 | 10.4/44.3 | 41.3 | 32.8 |
| 31.25 | - | - | 11.7/39 | 11.7/42.9 | 39.9 | 30.9 |
| 62.5 | - | - | 17.0/35 | 17.0/38.4 | 35.4 | 24.8 |
| 100.0 | - | - | 22.0/32 | 22.0/35.3 | 32.3 | 20.8 |
The following requirements apply only to wire and cable
used for patch cord and cross connect jumpers:
Ø Jumper/Patch cord maximum length limitations
· 20 metres (66 feet) in main cross connect
· 20 metres (66 feet) in intermediate cross connect
· 6 metres (20 feet) in telecommunications closet
· 3 metres (10 feet) in the work area
Ø Patch cord cable construction
· Stranded conductors for extended flex-life