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3 specifications found, displaying 1 to 3
Specification NumberTypeTitleStatusPrimary Responsible Group 
42.068TSVoice Group Call Service (VGCS); Stage 1Under change control S1
See details Internal Common IMS 2G 3G LTE 5G
43.068TSVoice Group Call Service (VGCS); Stage 2Under change control C1
See details Internal Common IMS 2G 3G LTE 5G
44.068TSGroup Call Control (GCC) protocolUnder change control C1
See details Internal Common IMS 2G 3G LTE 5G