Terristrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 11: Supplementary Services stage 2; Sub-part 20: Discreet listening (DL) (Endorsement of the English version ETS 300392-11-20:1999 as German standard)
Edition 2000-05

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  23: Call Completion on No Reply (CCNR) (Endorsement of the English version ETS 300392-11-23:2000 as German standard)
Edition 2000-12

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 11: Supplementary services stage 2; Sub-part 11-24: Call Retention (CRT) (Endorsement of the English version ETS 300392-11-24:2000-09 as German standard)
Edition 2001-08

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 12: Supplementary Services stage 3; Sub-part 12-2: Call Report (CR) (Endorsement of the English version ETS 300392-12-2:2000-09 as German standard)
Edition 2001-08

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 12: Supplementary service stage 3; Sub-part 12-5: List Search Call (LSC) (Endorsement of the English version ETS 300392-12-5:2000-09 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

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 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 12-24: Call Retention (CRT) (Endorsement of the English version ETS 300392-12-24:2000-09 as German Standard)
Edition 2001-08