Simplified Call Flow Signaling: Registration - The Attach Procedure

This video provides an example of the registration procedure. The device or UE needs to let the core network(s) know that it is switched on and active. This procedure is known as registration. The UE can register individually to the CS and PS core networks. Most modern networks allow combined registration (or combined attach) whereby the UE registers only to the PS network and the PS network informs the CS network that the UE is active.





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