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Standard ECMA-148
Private Integrated Services Network (PISN) - Specification, Functional Model and Information Flows - Identification Supplementary Services (ISSD)

3rd edition (June 1997)

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-148 1st edition Acrobat (r) PDF file
ECMA-148 2nd edition Acrobat (r) PDF file

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