protocols - Is x.224 specification freely available? -

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I need to implement a normal check that uses the "open" Microsoft RDP protocol but this protocol is X. 224 refers to the specification and ITU wants money to download it. Is there a free version of the x.224 protocol available?

While I recommend a free version X.224 RFC1950 says this:

ITU-T recommendation X.224, contract D, "checksum algorithm,"
November 1993, pp 144, 145. (available from Gopher: //info.itu.ch). ITU-T X.244 is similar to ISO 8073 .

ISO 8073 is available at.


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