Originally, CDR (Call Detail Recording) was used to assign call charges to a station. For this purpose, various call details are output in a flexible format. These CDR records can then be transferred for further processing.

This principle had been enhanced. Call charge recording is enhanced by the feature "CDRe". This means, that not just call charges are recorded but also all call details. These records are then transferred for further processing. They are also used to measure the effectiveness of call handling and performance They are also used to measure the effectiveness of call handling and performance.

For a Call Management System (CMS) to be able to generate useful information, each destination change must generate a separate call data record. CDRe can be deactivated if these records are not required.

To facilitate the evaluation of the call data records with regard to effectiveness and performance, additional information fields are recorded in the OpenScape 4000; these are available for output in the data record.

In addition to the various numbers associated with the connection, the time a connection waits in the queue is now recorded for attendant consoles.