The average call duration (ACD) is a measurement in

telecommunications Telecommunication is the transmission of information by various types of technologies over wire, radio, optical, or other electromagnetic systems. It has its origin in the desire of humans for communication over a distance greater than that fe ...

that reflects an average length of telephone calls transmitted on

telecommunication network A telecommunications network is a group of nodes interconnected by telecommunications links that are used to exchange messages between the nodes. The links may use a variety of technologies based on the methodologies of circuit switching, mess ...

s. The measurement is typically based on the reporting by telecommunication equipment via

call detail record A call detail record (CDR) is a data record produced by a telephone exchange or other telecommunications equipment that documents the details of a telephone call or other telecommunications transactions (e.g., text message) that passes through that ...

s. Samples are collected to determine traffic demand and forecast call volumes, serving also as a tool for infrastructure monitoring of

switches In electrical engineering, a switch is an electrical component that can disconnect or connect the conducting path in an electrical circuit, interrupting the electric current or diverting it from one conductor to another. The most common type of ...

and cables. Depending on the type of call being made, ACD can be used as a proxy measure of call quality.

See also