Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 12: supplementary services stage 3 - sub-part 21 : ambience Listening (AL) (V1.5.1)
Edition 2012-08-01

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 12: supplementary services stage 3 - Sub-part 14 : Late Entry (LE) (V1.2.1)
Edition 2012-08-01

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 12: supplementary services stage 3 - Sub-part 13 : Call Completion to Busy Subscriber (CCBS) (V1.2.1)
Edition 2012-08-01

Integrated Services Digital Network (ISDN). User-to-User Signalling (UUS) supplementary service. Digital Subscriber Signalling System number one (DSS1) protocol. Part 1: protocol specification
Edition 1999-04-01

Integrated Services Digital Network (ISDN). Signalling System n o 7 ISDN User Part (ISUP) version 2 for the international interface . Part 18: completion of Calls to Busy Subscriber (CCBS) supplementary service
Edition 1997-07-01

Integrated Services Digital Network (ISDN). Completion of Calls to Busy Subscriber (CCBS) supplementary service. Digital Subscriber Signalling System no 1 (DSS1) protocol. Part 1: protocol specification
Edition 1998-10-01

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 12: supplementary services stage 3 - Sub-part 23: Call Completion on No Reply (CCNR) (V1.2.0)
Edition 2012-09-01

Low-voltage fuses - Part 3: supplementary requirements for fuses for use by unskilled persons (fuses mainly for household or similar application) - Examples of standardized systems of fuses A to F
Edition 2013-09-21

Integrated Services Digital Network (ISDN) - Calling Line Identification Restriction (CLIR) supplementary service - Digital Subscriber Signalling System No one (DSS1) protocol - Part 1: protocol specification
Edition 2001-04-01

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 11: supplementary services stage 2 - Sub-part 16 : Pre-emptive Priority Call (PPC) (V1.2.1)
Edition 2005-06-01