| RTS/TSGS-0223272v8c0 (TS 123 272) | Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Circuit Switched (CS) fallback in Evolved Packet System (EPS); Stage 2; (3GPP TS 23.272 version 8.12.0 Release 8) | 8.12.0 | 4.1, 4.2, 4.3.1, 6.2, 7.3 |