Transmission (telecommunications)

Antenna used for transmission of radio signals

In telecommunications, transmission is the process of sending and propagating an analogue or digital signal using a wired, optical, or wireless electromagnetic transmission medium.[1][2]

Transmission technologies typically refer to physical layer protocol duties such as modulation, demodulation, line coding, equalization, error control, bit synchronization and multiplexing, but it may also involve higher-layer protocol duties, for example, digitizing an analog signal, and data compression.

Examples of transmission are the sending of signals with limited duration, for example a block or packet of data, a phone call, or an email. Transmission of a digital message, or of a digitized analog signal, is known as data transmission.


  1. ^ "Telecommunications Technology Fundamentals". 28 December 2001.
  2. ^ "Telecommunications Media". 21 January 2014.