143
Category-5 cables provide a transmission frequency of 100 MHz for voice and data transmission.
They are typically used in 100Base-T and 10Base-T networks. Category-5 cables are common
Ethernet cables, which can also be used to transmit 1000 Mbps Ethernet data.
Category-5 enhanced cables feature low attenuation and crosstalk, providing higher attenuation to
crosstalk ratio (ACR), less delay error and higher performance than category-5 cables. Category-5
enhanced cables are mainly used in 1000 Mbps Ethernet networks.
Category-6 cables provide a transmission frequency of 1 MHz to 250 MHz, and improve the
performance on crosstalk and return loss. A fine better return loss performance is extremely
important for new-generation full-duplex high-speed networks. Category-6 cables have sufficient
power sum ACR (PS-ACR) when working at 200 MHz. They provide a bandwidth two times than that
of category-5 enhanced cables, thus featuring a higher transmission performance. Therefore,
category-6 cables are suitable for applications requiring a transmission speed of more than 1 Gbps.
The 10/100 Mbps Ethernet uses two pairs of cables, orange/white, orange, green/white and green
cables, to transmit and receive data. The 1000 Mbps Ethernet uses four pairs of cables to transmit
and receive data.
For the pinouts of common twisted pair cables, see the following tables. (A and B represent the two
ends of a cable.)
Table 230 Straight-through cable pinouts
1 Orange/white Orange/white
2 Orange Orange
3 Green/white Green/white
4 Blue Blue
5 Blue/white Blue/white
6 Green Green
7 Brown/white Brown/white
8 Brown Brown
Table 231 Crossover cable pinouts
1 Orange/white Green/white
2 Orange Green
3 Green/white Orange/white
4 Blue Blue
5 Blue/white Blue/white
6 Green Orange
7 Brown/white Brown/white
8 Brown Brown
To ensure communication quality, u
se the pinouts in the above tables when identifying or making
the two types of Ethernet cables.
To Next Page
Loading...
Need help?
General
