NSS - Network Switching Subsystem
Network Switching Subsystem (NSS)
The Network Switching Subsystem (NSS) is a key component in a GSM network responsible for call processing and subscriber mobility management. It consists of several network elements, including:
Mobile Switching Center (MSC): Manages call setup, routing, and mobility.
Home Location Register (HLR): A database storing details of each subscriber.
Visitor Location Register (VLR): Temporarily holds data about subscribers currently in the MSC area.
Authentication Center (AUC): Provides data for verifying user identity.
Equipment Identity Register (EIR): Keeps records of mobile equipment to prevent fraud.
The NSS facilitates communication between mobile users and connects them to other networks.
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