CAN/CSA-ISO/IEC 15050-04 (R2019)
CAN/CSA-ISO/IEC 15050-04 (R2019)
Information Technology - Telecommunications and Information Exchange Between Systems - Private Integrated Services Network - Inter-Exchange Signalling Protocol - Advice Of Charge Supplementary Services (Adopted ISO/IEC 15050:2003, second edition, 2003-04-01)standard by Canada National Standard/Canadian Standards - ISO/IEC, 12/01/2004