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Standard ECMA-178
Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Call Transfer Supplementary Service (QSIG-CT)

3^rd edition (December 2001)

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-178 1st edition	NOT AVAILABLE
ECMA-178 2nd edition	Acrobat (r) PDF file

 

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