A method of coding which alters the binary signal by dividing the bit period into halves and using a change in voltage to differentiate the two halves. A binary "1" is sent by having a high voltage during the first interval and a low voltage during the second. A binary "0" is the reverse.

A signaling method by which clock and data bit information can be combined into a single, self-synchronizable data stream. A transition takes place in the middle of each bit time. A low-to-high transition represents a one; a high-to-low transition represents a zero.

Signal encoding method used in all 10 Mbps Ethernet media systems. Each bit of information is converted into a "bit symbol" which is divided into two halves. One half is high and the other is low. Manchester encoding results in a 20 Mbaud stream although data is only being sent at 10 Mbps.