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 facility or device. The record contains various attributes of the call, such as time, duration, completion status, source number, and destination number.^[1]^[2]^[3] It is the automated equivalent of the paper toll tickets that were written and timed by operators for long-distance calls in a manual telephone exchange.

^ Horak, Ray (2007). Telecommunications and data communications handbook. Hoboken, N.J.: WWiley-Interscience. pp. 110–111. ISBN 978-0-470-12722-3.
^ Peterson, Kerstin Day (2000). Business telecom systems: a guide to choosing the best technologies and services. New York, NY: CMP Books. p. 412. ISBN 1-57820-041-5.
^ Petersen, Julie K. (2002). The Telecommunications Illustrated Dictionary (2nd ed.). Hoboken: CRC Press. p. 147. ISBN 1-4200-4067-7.

[Horak-1] Horak, Ray (2007). Telecommunications and data communications handbook. Hoboken, N.J.: WWiley-Interscience. pp. 110–111. ISBN 978-0-470-12722-3.

[KDP-2] Peterson, Kerstin Day (2000). Business telecom systems: a guide to choosing the best technologies and services. New York, NY: CMP Books. p. 412. ISBN 1-57820-041-5.

[JKP-3] Petersen, Julie K. (2002). The Telecommunications Illustrated Dictionary (2nd ed.). Hoboken: CRC Press. p. 147. ISBN 1-4200-4067-7.

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