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Standard ECMA-309
Corporate Telecommunication Networks - Signalling Interworking between QSIG and H.323 - Call Diversion Supplementary Services

2^nd edition (June 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-309 1st edition	Acrobat (r) PDF file

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