The scope of this report is to give guidelines concerning the specification of the Visitor Location Register (VLR). In the case of discrepancy between this report and the approved core GSM recommendations the later shall prevail. Each function is specified as either mandatory or optional.
The different functions provided by the VLR are identified with an indication of the relevant recommendations where the definitive specifications can be found.
The purpose of this report is to give an overview of the VLR functions needed to implement the GSM system, in order to help both the Administrations/Operators in the procurement of their equipments and the manufacturers tendering the VLR.