PLMn (Public Land Mobile Network) refers to a network operated by a particular mobile operator that provides land-based wireless telecommunications services to users within a specific geographic area. The PLMn identifies the network and its associated services, ensuring that mobile devices connect to the correct network for communication, roaming, and service access.
What is PLMn used for?
PLMn is used for identifying and managing mobile networks, enabling mobile devices to connect to the correct network, particularly when roaming between different networks. The PLMn is crucial for ensuring that a device can register on the network, authenticate users, and provide access to services like voice calls, messaging, and data.
In a SIM card, PLMn is stored as part of the network information to help the mobile device identify and connect to the correct home network or a partner network when roaming. The SIM card uses the PLMn to determine whether the device should connect to its home network or switch to a roaming partner network, ensuring seamless service for the user.
The MSC (Mobile Switching Center) is a core component in mobile networks responsible for routing voice calls, SMS, and data services. It acts as a bridge between mobile users and the public switched telephone network (PSTN), handling call setup, routing, and termination. Additionally, the MSC manages mobility-related functions, such as handovers and roaming, ensuring continuous connectivity for users as they move between different cells or networks.
GSM (Global System for Mobile Communications) is a standard developed to describe protocols for second-generation (2G) digital cellular networks. It provides a framework for transmitting voice and data over mobile networks, offering services such as voice calls, SMS, and data transfer. GSM also includes security features like encryption and subscriber identity confidentiality, making it a reliable and secure standard for mobile communication.