Question RJ45 ethernet cable wiring

[cablecutter]

I am trying to create a cable for my home networking with RJ45 connectors and Cat5e cable
Noticed this wiring diagram and it shows only 4 wires are used for data transmission (other 4 wires are unused)
Can someone confirm if this is correct and does this affect the data transmission speed?

 

[SamirD]

That diagram is wrong. All 4 pairs are needed for gigabit. See this link:

https://allpinouts.org/pinouts/connectors/networking/ethernet-1000base-t-gigabit/

 

[cablecutter]

Thanks! 🙂

 

[SamirD]

You're welcome! Happy wiring!

 

[ch33zw1z]

It's only wrong in the fact that it's legacy, only defining the pinout for 10/100mbps. You still follow that pinout for making gigabit cables..

 

[Lost_in_the_HTTP]

Correct. It's not incorrect.


OP is reading the incorrect column.

 

[cablecutter]

When making the Gigabit cable, out of these pins, which pins control the data speed
When it's connected with pins 1,2,3 and 6, my internet still working with almost 40% speed
Which pins are critical in 568B format?

 

[mxnerd]

You have been told all four pairs are required for gigabit operation.

Ethernet over twisted pair - Wikipedia

en.wikipedia.org

1000BASE-T uses all four pairs bi-directionally using hybrid circuits and cancellers. Data is encoded using 4D-PAM5; four dimensions using PAM (pulse amplitude modulation) with five voltages, −2 V, −1 V, 0 V, +1 V, and +2 V. While +2 V to −2 V may appear at the pins of the line driver, the voltage on the cable is nominally +1 V, +0.5 V, 0 V, −0.5 V and −1 V.

You should look at the LED light on switch/router/NIC port to tell whether it's operated at gigabits speed. You also did not mention how did you test the speed. And wired or wifi?