Digital cellular telecommunications system (Phase 2+) (GSM); Unstructured Supplementary Service Data (USSD); Stage 3 (GSM 04.90 version 7.0.1 Release 1998)
Digital cellular telecommunications system (Phase 2+) (GSM); Explicit Call Transfer (ECT) supplementary service; Stage 3 (GSM 04.91 version 6.0.1 Release 1997)
Digital cellular telecommunications system (Phase 2+) (GSM); Explicit Call Transfer (ECT) supplementary service; Stage 3 (GSM 04.91 version 7.0.1 Release 1998)
Digital cellular telecommunications system (Phase 2+) (GSM); Modulation (GSM 05.04 version 6.0.0 Release 1997)
Digital cellular telecommunications system (Phase 2+) (GSM); Modulation (GSM 05.04 version 6.1.1 Release 1997)
Digital cellular telecommunications system (Phase 2+) (GSM); Modulation (GSM 05.04 version 7.0.1 Release 1998)
Digital cellular telecommunications system (Phase 2+) (GSM); Modulation (GSM 05.04 version 7.1.1 Release 1998)
Digital cellular telecommunications system (Phase 2+) (GSM); Modulation (GSM 05.04 version 8.1.2 Release 1999)
Digital cellular telecommunications system (Phase 2+) (GSM); Full rate speech; Processing functions (GSM 06.01 version 6.0.1 Release 1997)
Digital cellular telecommunications system (Phase 2+) (GSM); Full rate speech; Processing functions (GSM 06.01 version 7.0.2 Release 1998)
Digital cellular telecommunications system (Phase 2+) (GSM); Full rate speech; Processing functions (GSM 06.01 version 8.0.1 Release 1999)
Digital cellular telecommunications system (Phase 2+) (GSM); Full rate speech; Transcoding (GSM 06.10 version 6.0.1 Release 1997)
53,361 distinct reference strings indexed from official source snapshots. Includes earlier editions. The index and publisher collections have different coverage. See sources and coverage.