Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) and Signalling System No.7 (SS7) protocols - Call Forwarding on Not Reachable (CFNRc) supplementary service for Cordless Terminal Mobility (CTM) phase 1 - Part 5: Test Suite Structure and Test Purposes (TSS&TP) specification for the network
Edition 2001-11-01

Corporate telecommunication Networks (CN) - Signalling interworking between SQIG and H.323 - Call diversion supplementary services
Edition 2003-07-01

Terrestrial Trunked Radio (TETRA) - Voice plus data (V+D) - Part 10: supplementary services stage 1 - Sub-part 4 : Call Forwarding (CF) (V1.3.1)
Edition 2003-12-01

Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network; Inter-exchange signalling protocol; Call transfer supplementary service
Edition 2003-04

Private Integrated Services Network (PISN) - Specification, functional models and information flows - Call diversion supplementary service (V1.3.1)
Edition 2004-05-01

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Call diversion supplementary service (V1.3.1)
Edition 2004-05-01

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) and Signalling System No. 7 (SS7) protocols - Call Forwarding on Not Reachable (CFNRc) supplementary service for Cordless Terminal Mobility (CTM) phase 1 - Part 1: protocol specification
Edition 2000-06-01

Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); - Part 12: Supplementary services stage 3; Sub-part 4: Call Forwarding (CF) (ETSI EN 300392-12-4 V1.4.1 (2016-07))
Edition 2016-10-01

Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 12: supplementary services stage 3 - Sub-part 4 : call Forwarding (CF) (V1.3.1)
Edition 2012-07-01