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Standard ECMA-213
Private Integrated Services Network (PISN) - Specification, Functional Model and Information Flows - Recall Supplementary Service (RESD)

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-213 1st edition Acrobat (r) PDF file
ECMA-213 2nd edition Acrobat (r) PDF file

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