Home Location Register (HLR)
Home Location Register is a database that contains data regarding authorized subscribers using a global system for mobile communication core network.
Half Duplex
Half Duplex (HDX) is a type of communication system. In half duplex, there is a two-way communication between the sender and the receiver.
Home Public Mobile Network
The Home Public Mobile Network (HPMN) is the network of an operator in which a mobile subscriber has a subscription.