Editing Node-to-node data transfer (section)

==Line coding==
:''See main article [[Line code]]''

'''Line coding''' consists of representing the [[Digital signal (electronics)|digital signal]] to be transported, by an amplitude- and time-discrete signal, that is optimally tuned for the specific properties of the physical channel (and of the receiving equipment). The [[waveform]] pattern of voltage or current used to represent the 1s and 0s of a digital signal on a transmission link is called '''''line encoding'''''. 
After line coding, the signal can directly be put on a transmission line, in the form of variations of the current. The common types of line encoding are [[Unipolar encoding|unipolar]], [[Polar encoding|polar]], [[Bipolar encoding|bipolar]] and [[Manchester encoding]].

Line coding should make it possible for the receiver to synchronise itself to the [[phase (waves)|phase]] of the received signal. It is also preferred for the line code to have a structure that will enable error detection.

Examples of '''line coding''' include:
''(see main article [[line code]])''
*[[B8ZS]]
*[[HDB3]]
*[[2B1Q]]
*[[Alternate Mark Inversion|AMI]]
*[[Gray coding]]