Home Location Register (HLR)

The HLR used in existing IS-95 networks needs to store additional subscriber
information associated with the introduction of packet data services.
The HLR performs the same role for packet services as it currently does for
voice services in that it stores the subscriber packet data service options
and terminal capabilities along with the traditional voice platform needs.
The service information from the HLR is downloaded in the Visitor Location
Register (VLR) of the associated network switch, during the successful
registration process. The same process as it is done in existing IS-95 systems
and other 1G and 2G voice-oriented systems.