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2 specifications found, displaying 1 to 2
Specification NumberTypeTitleStatusPrimary Responsible Group 
22.228TSService requirements for the Internet Protocol (IP) multimedia core network subsystem (IMS); Stage 1Under change control S1
See details Internal Common IMS 2G 3G LTE 5G
22.809TRFeasibility study on support for 3GPP voice interworking with enterprise IP-PBX (VINE)Under change control S1
See details Internal Common IMS 2G 3G LTE 5G