CPDLC
Joined: Jun 2002
Posts: 50
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A good reference is:
https://www.itu.int/dms_pub/itu-t/op...16-4-PDF-E.pdf
Look at paragraphs 10.2.3 and 11.1.2.1
https://www.itu.int/dms_pub/itu-t/op...16-4-PDF-E.pdf
Look at paragraphs 10.2.3 and 11.1.2.1
