29.231: Application of SIP-I Protocols to Circuit Switched (CS) core network architecture; Stage 3

Info Page @ 3GPP
Rel-13
v13.0.0
Rel-12
v12.0.0
Rel-11
v11.0.0
Rel-10
v10.0.0
Rel-9
v9.1.0
Rel-8
v8.4.0