|  | 7.3 | Ethernet and IEEE 802.3
| 7.3.5 | Ethernet signaling

Signal encoding is a way of combining both clock and data information into a stream of signals over a medium. The rules of Manchester encoding define a 0 as a signal that is high for the first half of the period and low for the second half. It defines a 1 as a signal that is low for the first half of the period and high for the second half. The rules define a 1 as a signal that is low for the first half of the period and high for the second half.

10BASE-T transceivers are designed to send and receive signals over a segment that consists of 4 wires - 1 pair of wires for transmitting data, and 1 pair of wires for receiving data.

Note: Manchester encoding results in 0 being encoded as a high-to-low transition and 1 being encoded as a low-to-high transition. Because both 0's and 1's result in a transition to the signal, the clock can be effectively recovered at the receiver.