Call Detail Record

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A Call Detail Record or Call Data Record ( CDR ) contains the information required for a billing system in the telecommunications sector . In German usage, the term communication data set (KDS), connection data set , individual call record (EGN) or individual call record (EVN) is used. Mobile phone companies also create CDRs for SMS , MMS and WAP connections, i.e. for all connections that can be billed to a customer.

Examples:

• Starting point ( A-participant )
• Target number ( B subscriber )
• current time of connection start
• Duration of the connection in seconds

In the case of mobile communications, there is also:

• International Mobile Equipment Identity (IMEI) of the end device
• Identification number of the radio cell or the cellular base station (Cell-ID)
• Number of data transferred in bytes e.g. B. for ringtone downloads and WAP portals

The Call Detail Record is required , among other things, for the creation of the telephone bill ( billing ).