<P> A 10BASE - T transmitter sends two differential voltages, + 2.5 V or − 2.5 V . </P> <P> 100BASE - TX follows the same wiring patterns as 10BASE - T, but is more sensitive to wire quality and length, due to the higher bit rates . </P> <P> A 100BASE - TX transmitter sends three differential voltages, + 1 V, 0 V, or − 1 V . </P> <P> 1000BASE - T uses all four pairs bi-directionally using hybrid circuits and cancellers . The standard includes auto MDI - X; however, implementation is optional . With the way that 1000BASE - T implements signaling, how the cable is wired is immaterial in actual usage . The standard on copper twisted pair is IEEE 802.3 ab for Cat 5e UTP, or 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 voltage 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 . </P>

Ethernet 10 base 2 is an example of which topology