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2 specifications found, displaying 1 to 2
Specification NumberTypeTitleStatusPrimary Responsible Group 
23.228TSIP Multimedia Subsystem (IMS); Stage 2Under change control S2
See details Internal Common IMS 2G 3G LTE 5G
23.279TSCombining Circuit Switched (CS) and IP Multimedia Subsystem (IMS) services; Stage 2Under change control S2
See details Internal Common IMS 2G 3G LTE 5G