Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 9: General requirements for supplementary services (ETSI EN 300392-9 V1.5.1 (2012-04))
Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 3: Interworking at the Inter-System Interface (ISI) - Sub-part 3: Additional Network Feature Group Call (ANF-ISIGC) (ETSI EN 300392-3-3 V1.3.1 (2011-11))
Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); -- Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 3: Additional Network Feature Group Call (ANF-ISIGC) (ETSI EN 300 392-3-3 V1.4.1 (2017-12))
Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 10: General design, PSS1 over E.1 (ETSI EN 300 392-3-10 V1.2.1 (2020-04))
Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 13: Transport layer independent Additional Network Feature Group Call (ANF-ISIGC) (ETSI EN 300 392-3-13 V1.2.1 (2020-04))
Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 3: Interworking at the Inter-System Interface (ISI) - Sub-part 4: Additional Network Feature Short Data Service (ANF-ISISDS) (ETSI EN 300392-3-4 V1.3.1 (2010-08))
Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Cordless terminal authentication supplementary services - Part 1: Test Suite Structure and Test Purposes (TSS&TP) specification for the VPN "b" service entry point
