If we use half duplex in ethernet which wire pair communicate between devices?

Question

we use 2 wire pair in full duplex white orange,orange & White green,Green.first two wire is transmitting & other is recieving.I f so which wire pair we use in half duplex?.

Answer 1

Half-duplex uses both pairs, the same as full-duplex does. It just cannot send and receive at the same time, that's all.

Answer 2

Half Duplex Ethernet Wiring

Answer 3

In half duplex you usually do not send and recieve simultaneously.

The following applies for 10 and 100 Mbps transmissions:

Using standard Ethernet protocol, pins 1 and 2 are for send, 3 and 6 are for receive. Wire color is not the way to identify the pins because there are 2 ethernet wire substandards, a and b and in A, the pins 1 and 2 are green white and green and pins 3 and 6 are orange white and orange and this is exactly reversed in the B substandard.

Regardless of whether you use full or half duplex or 10,100, or 1000 Mbps always wire properly for the use of all 4 CAT5 pairs. Some day you will upgrade to a faste speed and need them.

For 1000 Mbps, or GB transmissions, all wires are used.

Answer 4

I guess the Pins 1 & 2 are the communicating wires in Half Duplex. Of course this can be checked by simply setting the Network Interface Card to Half Duplex (from Control Panel/ Network Connections/ Local Area Connection/ Properties/ Configure/ Advanced/ Link Speed/ Duplex Mode) and disconnecting pins 3 & 6 and checking if your PC is connected to the LAN. Make sure that the two check boxes at the bottom of Local Area Connection/ Properties are ticked.