Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 12: Supplementary services stage 3 - Sub-part 16: Pre-emptive Priority Call (PPC) (Endorsement of the English version EN 300392-12-16 V1.2.1 (2004-09) as German standard)
Edition 2005-04

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 10: Supplementary services stage 1 - Sub-part 21: Ambience Listening (AL) (Endorsement of the English version EN 300392-10-21 V1.2.1 (2003-09) as German standard)
Edition 2004-08

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 11: Supplementary services stage 2 - Sub-part 1: Call Identification (CI) (Endorsement of the English version EN 300392-11-1 V1.2.1 (2004-01) as German standard)
Edition 2004-12

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 12: Supplementary services stage 3 - Sub-part 10: Priority Call (PC) (Endorsement of the English version EN 300392-12-10 V1.2.1 (2004-02) as German standard)
Edition 2004-12

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 11: Supplementary services stage 2 - Sub-part 16: Pre-emptive Priority Call (PPC) (Endorsement of the English version EN 300392-11-16 V1.2.1 (2004-09) as German standard)
Edition 2005-04

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 12: Supplementary services stage 3 - Sub-part 12: Call Hold (HOLD) (Endorsement of the English version EN 300392-12-12 V1.1.2 (2003-05) as German standard)
Edition 2004-08

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 10: Supplementary services stage 1 - Sub-part 8: Area Selection (AS) (Endorsement of the English version EN 300392-10-8 V1.2.1 (2004-02) as German standard)
Edition 2004-12

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 10: Supplementary services stage 1 - Sub-part 1: Call identification (CI) (Endorsement of the English version EN 300392-10-1 V1.3.1 (2004-01) as German standard)
Edition 2004-12

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 10: Supplementary services stage 1 - Sub-part 11: Call Waiting (CW) (Endorsement of the English version EN 300392-10-11 V1.3.1 (2004-01) as German standard)
Edition 2004-12

Private Integrated Services Network (PISN) - Specification, functional model and information flows - Short message service supplementary service [ISO/IEC 21989 (2002) modified] (Endorsement of the English version EN 301990 V1.1.1 (2003-06) as German standard)
Edition 2004-03