Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 4: Gateways basic operation; Sub-part 4-2: Integrated Services Digital Network (ISDN) gateway (Endorsement of the English version ETS 300392-4-2:2000-09 as German Standard)
Edition 2001-07

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 11: Supplementary services stage 2; Sub-part 11-8: Area Selection (AS) (Endorsement of the English version EN 300392-11-8 V 1.1.1 (2000-12) as German standard)
Edition 2001-08

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 12: Supplementary services stage 3; Sub-part 12-11: Call waiting (CW) (Endorsement of the English version ETS 300392-12-11:2000-09 as German standard)
Edition 2001-08

Digital Enhanced Cordless Telecommunications (DECT) - Radio in the Local Loop (RLL) Access Profile (RAP) - Part 2: Advanced telephony services (Endorsement of the English version EN 300765-2 V 1.2.1 (2001-02) as German standard)
Edition 2002-05

Digital Enhanced Cordless Telecommunications (DECT) - Integrated Services Digital Network (ISDN); DECT/ISDN interworking for end system configuration - Part 1: Interworking specification (Endorsement of the English version EN 300434-1 V 1.2.1 (2001-10) as German Standard)
Edition 2002-11

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 12: Supplementary services stage 3; Sub-part 17: Include Call (IC) (Endorsement of the English version EN 300392-12-17 V 1.1.2 (2002-01) as German standard)
Edition 2003-04

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 12: Supplementary services stage 3; Sub-part 18: Barring of Outgoing Calls (BOC) (Endorsement of the English version EN 300392-12-18 V 1.1.1 (2001-08) as German standard)
Edition 2003-04

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 11: Supplementary services stage 2; Sub-part 17: Include Call (IC) (Endorsement of the English version EN 300392-11-17 V 1.1.2 (2002-01) as German standard)
Edition 2003-04

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 11: Supplementary services stage 2; Sub-part 18: Barring of Outgoing Calls (BOC) (Endorsement of the English version EN 300392-11-18 V 1.1.1 (2001-08) as German standard)
Edition 2003-04

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 11: Supplementary services stage 2; Sub-part 14: Late Entry (LE) (Endorsement of the English version EN 300392-11-14 V 1.1.1 (2002-07) as German standard)
Edition 2003-04