Mobile Networks Overview 2G/3G/4G-LTE/5G (Episode 25)
You can download the slides via this link: [ Ссылка ]
+ IMS Registration Signaling Flow
+ IMS / VoLTE Basic Call Flows
+ VoLTE to VoLTE Simple Call Flow
+ VoLTE to PSTN Simple Signaling and Call Flow
+ PSTN to VoLTE Signaling and Call Flow
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