Consultative Committee for International Telephony and Telegraphy

Abbreviated CCITT. An organization based in Geneva that develops worldwide data communications standards. Three main sets of standards have been established:

• CCITT Groups 1-4 standards apply to facsimile transmissions.
• CCITT V series of standards apply to modems and error detection and correction methods.
• CCITT X series standards apply to LANs.

Recommendations are published every four years. In 1993, after a reorganization, the name was changed to International Telecommunication Union (ITU), and even though ITU now creates recommendations and standards, you will still hear the CCITT standards mentioned.

See also International Telecommunication Union.