The HLR application maintains a subscriber database that associates Network Entities with IMSIs and DNs. The bulk of information in the database is provisioned through a PDBI interface, but the application GUI allows you to view database entries and make adjustments as necessary. A Network Entity is an end node that provides a voice or signaling service. In this application, the Network Entity is an HLR.
Each Network Entity record describes an HLR signal point with its E.164 number and routing data required to successfully forward an SS7 message to it. Spare point codes, indicated by an optional s- prefix, are supported for Network Entities with a point code type of International or National. A maximum of 512 Network Entity records are supported.