Digital cellular telecommunications system (Phase 2) - Call Forwarding (CF) supplementary services - Stage 1 (Endorsement of the English version ETS 300515:1996-05 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Call Forwarding (CF) supplementary services - Stage 2 (Endorsement of the English version ETS 300543:1997-01 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Call Forwarding (CF) supplementary services - Stage 3 (Endorsement of the English version ETS 300566:1996-08 as German standard)
Edition 2001-04

Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network; Specification, functional model and information flows; Call diversion supplementary services
Edition 2003-04

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

Integrated Services Digital Network (ISDN) - Selective Call Forwarding (SCF) supplementary services (unconditional, busy and no reply) - Service description
Edition 2001-12-01

Integrated Services Digital Network (ISDN) - Diversion supplementary services - Digital Subscriber Signalling System No one (DSS1) protocol - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification
Edition 2001-05-01

Integrated Services Digital Network (ISDN) - Diversion supplementary services - Digital Subscriber Signalling System No one (DSS1) protocol - Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification for the user
Edition 2001-05-01

Integrated Services Digital Network (ISDN) - Diversion supplementary services - Digital Subscriber Signalling System No one (DSS1) protocol - Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the user
Edition 2001-05-01

Integrated Services Digital Network (ISDN) - Diversion supplementary services - Digital Subscriber Signalling System No one (DSS1) protocol - Part 5: Test Suite Structure and Test Purpose (TSS&TP) specification for the network
Edition 2001-05-01