Call Detail Record (CDR)

Call detail records (CDRs) capture information on calls made on telephone systems, including who made the call (name and number), who was called (name if available, and number), the date and time the call was made, the duration of the call, and typically dozens of usage and diagnostic information elements (for example, features used and reason for call termination). CDRs are collected on a regular basis for processing into usage, capacity, performance and diagnostic reports. With such information, it is easier to spot exceptions to regular calling patterns, such as out-of-hours calling, international calls, significant variances from previous reporting periods and call destinations that do not reflect normal calling patterns for the enterprise.