"Apertio's data base technology, the One-NDS (Network Directory Server), acts as a data base for legacy subscriber management platforms, such as the HLR (home location register) used by mobile operators, and, more importantly, for the next-generation HSS (home subscriber server), a core element in an IP Multimedia Subsystem (IMS) that manages the subscriber data underpinning mobile and fixed-line services...
Having a unified subscriber management database will be important for carriers wanting to operate a single, converged network for all its subscribers and have a single source of operating data to underpin important new revenue-generating services based on identity management."