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Standard ECMA-285
Protocol for Computer Supported Telecommunications Applications (CSTA) Phase III

4th edition (December 2011)

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-285 1st edition Acrobat (r) PDF file
ECMA-285 2nd edition Acrobat (r) PDF file
ECMA-285 3rd edition Acrobat (r) PDF file


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