Phone Call Detail Record

A Phone Call Detail Record is an event record with the contextual data of a phone call.

• See: Call Detail Record Dataset.

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References

2013

• http://en.wikipedia.org/wiki/Call_detail_record
  • A call detail record (CDR), also known as call data record, is a data record produced by a telephone exchange or other telecommunications equipment documenting the details of a phone call that passed through the facility or device. 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.

    A call detail record is composed of data fields that describe the telecommunication transaction, such as:

    • the phone number of the subscriber originating the call (calling party)
    • the phone number receiving the call (called party)
    • the starting time of the call (date and time)
    • the call duration
    • the billing phone number that is charged for the call
    • the identification of the telephone exchange or equipment writing the record
    • a sequence number identifying the record
    • additional digits on the called number used to route or charge the call
    • the disposition or the results of the call, indicating for example whether the called party was busy, or the call failed
    • the route by which the call entered the exchange
    • the route by which the call left the exchange
    • call type (voice, SMS, etc.)
    • any fault condition encountered
  • Each exchange manufacturer decides which information is emitted on the tickets and how it is formatted. Examples:
    • Send the timestamp of the end of call instead of duration
    • Voice-only machines may not send call type
    • Some small PBX does not send the calling party
  • A station messaging detail record (SMDR) is similar to a CDR, but the most important difference is in the usage.

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