43.068: Voice Group Call Service (VGCS); Stage 2

Info Page @ 3GPP
Rel-13
v13.1.0
Rel-12
v12.1.0
v12.0.0
Rel-11
v11.4.0
Rel-10
v10.1.0
Rel-9
v9.3.0
Rel-8
v8.6.0
Rel-7
v7.10.0
Rel-6
v6.8.0
Rel-5
v5.6.0
Rel-4
v4.6.0