LSIS XGL-EFMT - Page 32

Chapter 2 Product Specifications
2-10
2) Classification based on frequency used
Classification
Frequency used
(MHz)
Transmission
Speed (Mbps)
Purpose
Category 1 Phonetic Frequency
1 Phone network (2-Pair)
Category 2 4 4 Multi-Pair communication cable
Category 3 16 16 Phone network + Computer network
Category 4 20 20
1) Computer network transmission
speed Up
2) Low-loss communication cable
Category 5 and
Enhanced
Category 5
100 100
1) Digital Phone network +
Computer network
2) Low-loss, broadband cable
Category 6
Category 6A
250
500
1000
10000
-
Category 7
Category 7A
600
1000
10000
10000
-
Notes
1) Presently classified items are Category 3, 5, En-Cat.5 and Cat.6 inside and outside of the
country, where Category 4 has been replaced by Category 5 and Category 7 is being under
development all over the world as STP structure.
3) Example (CTP-LAN5) of Category 5 twisted-pair cable (UTP)
Item
Unit
Value
Conductor resistance(Max)
Ω/km
93.5
Insulation resistance(Min)
MΩ·km
2,500
Voltage endurance
V/min
AC 500
Characteristic impedance
Ω(1~100MHz)
100 ± 15
Attenuation
dB/100m
or less
10MHz
6.5
16MHz
8.2
20MHz
9.3
Near-end crosstalk
Attenuation
dB/100m
or less
10MHz
47
16MHz
44
20MHz
42