Abstract: An apparatus for generating data for long duration calls includes: call sensors distributed across a network for detecting call messages, correlating call messages relating to a call, and for storing call message related information, including at least one of the call network endpoints in an at least partial correlated call record; a time detection module for determining which network endpoints are located in a time standard that has just passed, or is about to pass, a predetermined time; and a call record controller for providing a control signal instructing at least some call sensors to determine whether any correlated call records relate to a call that includes one of the determined network endpoints and that started more than a predetermined time period prior to the predetermined time. The call sensors generate and transmit for storage an interim call data record (CDR) for each of the determined correlated call records.

Abstract: A telecommunications network has a plurality of call sensors (10) for detecting call messages (34). The call sensors (10) correlate call messages relating to the same call occurring between an originating network endpoint and a destination network endpoint and store information relating to those call messages in a correlated call record, including at least one of the network endpoints for the call. In order to provide daily information relating to calls of long duration, a call record controller (18) determines which of the network endpoints (10) are located in a time standard that has just passed, or is about to pass, midnight and instructs all or some call sensors to determine whether any of the correlated call records relate to a call that includes one of the determined network endpoints and that started more than 24 hours previously.