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Standard ECMA-211
Private Integrated Services Network (PISN) - Specification, Functional Model and Information Flows - Advice of Charge Supplementary Services (AOCSD)

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-211 1st edition Acrobat (r) PDF file
ECMA-211 2nd edition Acrobat (r) PDF file

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