Telecommunication Standardization Sector of the International Telecommunications Union (ITU-T)

ITU-T abbreviates the Telecommunication Standardization Sector of the International Telecommunications Union. An example of an ITU-T standard in data networking is the X.509 standard for Public Key Infrastructure (PKI).

References:

http://www.itu.int/ITU-T/

http://www.itu.int/en/ITU-T/publications/Pages/recs.aspx