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Standard ECMA-142
Private Integrated Services Network (PISN) - Circuit Mode 64kbit/s Bearer Services - Service Description, Functional Capabilities and Information Flows (BCSD)

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-142 1st edition Acrobat (r) PDF file
ECMA-142 2nd edition Acrobat (r) PDF file


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