European digital cellular telecommunications system (Phase 2) - Description of Charge Advice Information (CAI); English version ETS 300510:1996
Edition 1996-10

Digital cellular telecommunications system (phase 2). Description of charge advice information (CAI) (GSM 02.24)
Edition 1996-08-01

Digital cellular telecommunications system (Phase 2+) - Advice of Charge (AoC) supplementary services - Stage 2 (GSM 03.86 version 7.0.1 Release 1998)
Edition 2000-04-01

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Advice of Charge (AoC) supplementary services for the VPN "b" service entry point [ISO/IEC 15049 (1997), modified] - Part 1: Test Suite Structure and Test Purposes (TSS&TP) specification
Edition 2000-12-01

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Advice of Charge (AoC) supplementary services - Part 2: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification (incl. Diskette!!!)
Edition 2002-04-01

Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Advice of charge supplementary services [ISO/IEC 15050 (2003), modified]
Edition 2004-03-01

Digital cellular telecommunications system (Phase 2+) - Description of Charge Advice Information (CAI) (GSM 02.24 version 7.0.1 Release 1998)
Edition 2000-04-01

Digital cellular telecommunications system (Phase 2+) - Advice of Charge (AoC) supplementary services - Stage 3 (GSM 04.86 version 7.0.1 Release 1998)
Edition 2000-04-01

Private Integrated Services Network (PISN) - Specification, functional model and information flows - Advice of charge supplementary services [ISO/IEC 15049 (1997) modified]
Edition 2003-09-01

Integrated Services Digital Network (ISDN) - Advice of Charge (AOC) supplementary service - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 1: Protocol specification
Edition 1999-12-01