Line code
![An example of coding a binary signal using rectangular pulse amplitude modulation with polar non-return-to-zero code](/Images/godic/202412/23/NRZcode1339.png")
![Encoding of 11011000100 in Manchester encoding](/Images/godic/202412/23/Manchester_code.svg1339.png")
![](/Images/godic/202412/23/Binary_Line_Code_Waveforms1339.png")
In telecommunication, a line code is a code chosen for use within a communications system for transmitting a digital signal down a line. Line coding is often used for digital data transport. Some line codes are digital baseband modulation or digital baseband transmission methods, and these are baseband line codes that are used when the line can carry DC components.