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Standard ECMA-244
Private Integrated Services Network (PISN) - Mapping Functions for the Employment of a Circuit Mode Basic Service and the Supplementary Service User-to-User Signalling as a pair of On-demand Inter-PINX Connections (Mapping/UUS)

2nd edition (September 2000)

The latest edition of this Ecma Standard is available here.

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

File name Content
ECMA-244 1st edition Acrobat (r) PDF file

 

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