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Standard ECMA-212
Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Advice of Charge Supplementary Services (QSIG-AOC)

3rd edition (December 2001)

The latest edition of this Ecma Standard is available here.

You can download the previous replaced "historical" editions of this Ecma Standard, free of charge:

File name Content
ECMA-212 1st edition Acrobat (r) PDF file
ECMA-212 2nd edition Acrobat (r) PDF file


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