example, the location update messages received as mobile phones roam around.

Other GSM core network elements connected to the HLR

The HLR connects to the following elements:
* The G-MSC for handling incoming calls
* The VLR for handling requests from mobile phones to attach to the network
* The SMSC for handling incoming SMSs
* The voice mail system for delivering notifications to the mobile phone that a message is waiting
* The AuC for authentication and ciphering and exchange

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