ITU-T (International Telecommunications Union-Telecommunication Standardization Sector) companding standard used in the conversion between analogue and digital signals in PCM (Pulse Code Modulation) systems. In contrast to the North American m -law , a-law provides a constant signal to distortion ratio over a broader dynamic range of analogue input signals at the expense of a poorer signal to distortion ratio for low level signals.


  • Fully interactive 3GPP based network map
  • Narrated call flows
  • Detailed network procedures

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