Terrestial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 10: Supplementary services stage 1; Sub-part 10-24: Call retention (CRT) (Endorsement of the English version ETS 300392-10-24:2000-04 as German Standard)
Edition 2001-08

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 11: Supplementary services stage 2; Sub-part 11-11: Call waiting (CW) (Endorsement of the English version ETS 300392-11-11:2000-09 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

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 12: Supplementary services stage 3; Sub-part 7: Short Number Addressing (SNA) (Endorsement of the English version ETS 300392-12-7:2000 as German standard)
Edition 2000-12

Terristrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 11: Supplementary services stage 2; Sub-part 11-22: Dynamic group number assignment (DGNA) (Endorsement of the English version ETS 300392-11-20:2000-04 as German standard)
Edition 2001-08

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 11: Supplementary services stage 2 - Sub-part 12: Call Hold (HOLD) (Endorsement of the English version EN 300392-11-12 V1.1.2 (2003-05) as German standard)
Edition 2004-08

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 4: Gateways basic operation; Sub-part 1: Public Switched Telephone Network (PSTN) (Endorsement of the English version ETS 300392-4-1:1999 as German standard)
Edition 1999-12

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 11: Supplementary services stage 2; Sub-part 9: Access priority (AP) (Endorsement of the English version ETS 300392-11-9:1998 as German standard)
Edition 1999-12

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 12: Supplementary services stage 3; Sub-part 9: Access priority (AP) (Endorsement of the English version ETS 300392-12-9:1998 as German standard)
Edition 1999-12

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 11: Supplementary services stage 2; Sub-part 11-2: Call Report (CR) (Endorsement of the English version ETS 300392-11-2:2000-09 as German standard)
Edition 2001-08