The European Telecommunications Standards Institute specification for GSM event and call data provides detailed definitions for a variety of records needed in the administration of subscriber related event and call data [ETS99]. Table 5 gives the record structure for a mobile-originated call attempt, identifying and describing the name of the various fields involved and an indication of whether the field is mandatory (M), conditional ©, or optional (O).
Other record definitions also appear in the standard. The reader is asked to consult the standard directly for a more detailed explanation of the use of each field given in Table 5 and a better understanding of the range of records and data involved in network administration.


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