Abstract: A method and a system for building a Combined Call Detail Records data base (Combined CDR) in a management system of a telecommunications network, by collecting one or more call related events (real time Pre-CDRs) from the network with respect to a particular call by probes in real time, obtaining at least one off-line Call Detail Records data base (off-line CDR) from another system not belonging to the management system, and then integrating all the acquired data in a combined Call Detail Records data base (Combined CDR) of the management system, using computer means.

Abstract: A method and a system for building an Integrated Call Detail Records data base in a telecommunications network in real time, by collecting call related events concerning a particular call from two or more data sources by at least one suitable probe, merging the call related events and recording the merged events with respect to each particular call in real time using computerized means associated with the probe(s). The data sources may be mixed, i.e. comprising at least one bearer data source and at least one signaling data source; however, they may be sources of signaling data only. The sources of information may be situated at different interface points of the communication network.