Telecommunication Standardization Sector (ITU-T) is one of the three Sectors (branches) of the International Telecommunication Union (ITU). It is responsible for coordinating...

The ITU-T V-Series Recommendations on Data communication over the telephone network specify the protocols that govern approved modem communication standards...

T.38 is an ITU recommendation for allowing transmission of fax over IP networks (FoIP) in real time. The T.38 fax relay standard was devised in 1998 as...

functions. The protocols are standardised by the ITU Telecommunication Standardization Sector (ITU-T). T.120 has been implemented in various real-time collaboration...

("Ultrafine") Group 4 faxes conform to the ITU-T Recommendations T.563, T.503, T.521, T.6, T.62, T.70, T.411 to T.417. They are designed to operate over 64 kbit/s...

T.61 is an ITU-T Recommendation for a Teletex character set. T.61 predated Unicode, and was the primary character set in ASN.1 used in early versions of...

The ITU-T Recommendation E.212 defines mobile country codes (MCC) as well as mobile network codes (MNC). The mobile country code consists of three decimal...

ITU-T recommendation T.50 specifies the International Reference Alphabet (IRA), formerly International Alphabet No. 5 (IA5), a character encoding. ASCII...

V.92 is an ITU-T recommendation, titled Enhancements to Recommendation V.90, that establishes a modem standard allowing near 56 kb/s download and 48 kb/s...

Country codes are defined by the International Telecommunication Union (ITU) in ITU-T standards E.123 and E.164. The prefixes enable international direct...

Society ITU Radiocommunication Sector (ITU-R) ITU Telecommunication Development Sector (ITU-D) ITU Telecommunication Standardization Sector (ITU-T) ITU-R Recommendations...

supplied to telephone customers, starting in 1963. DTMF is standardized as ITU-T Recommendation Q.23. It is also known in the UK as MF4. Touch-tone dialing...

The V.23 standard was an early modem standard first approved by ITU-T precursor CCITT in 1964. It specifies audio frequency-shift keying (AFSK) to encode...

Differential Interface Circuits and its international equivalent ITU-T Recommendation T-REC-V.11, also known as X.27. These technical standards specify...

X.400 is a suite of ITU-T recommendations that define the ITU-T Message Handling System (MHS). At one time, the designers of X.400 were expecting it to...

(ISO/IEC JTC 1/SC 29/WG 1) – titled as Coding of still pictures. On the ITU-T side, ITU-T SG16 is the respective body. The original JPEG Group was organized...

spelling alphabet, ICAO phonetic alphabet, and ICAO spelling alphabet. The ITU phonetic alphabet and figure code is a rarely used variant that differs in...

standard ITU-T/CCITT V.24 [de], but equipment built to the current standard will interoperate with older versions.[citation needed] Related ITU-T standards...

Systems Interconnection – Remote Procedure Call (RPC)" and more recently in ITU-T Rec. X.667 | ISO/IEC 9834-8:2014. The Internet Engineering Task Force (IETF)...

available from the ITU-T as the X.200 series of recommendations. Some of the protocol specifications were also available as part of the ITU-T X series. The...

signaling (DTMF). The ITU-T V-series recommendations include the following early modem standards approved by the ITU in 1988: ITU-T V.21 specifies 300 bits...

Interchange Format (JFIF) is an image file format standard published as ITU-T Recommendation T.871 and ISO/IEC 10918-5. It defines supplementary specifications...

in the public switched telephone network (PSTN). It is specified by the ITU-T as part of the Q.76x series. When a telephone call is set up from one subscriber...

also known as Question 6) is a working group of the ITU Telecommunication Standardization Sector (ITU-T) concerned with standards for compression coding...

the International Telecommunication Union (ITU) in November 2001. Second-generation systems (VDSL2; ITU-T G.993.2 approved in February 2006) use frequencies...

typical value is 32 kHz. In 1987, the International Telecommunication Union (ITU) standardized a version of wideband audio known as G.722. Radio broadcasters...

Experts Group (JPEG) is the joint committee between ISO/IEC JTC 1/SC 29 and ITU-T Study Group 16 that created and maintains the JPEG, JPEG 2000, JPEG XR,...

formally defined primarily in ITU-T recommendations Q.701, Q.702, Q.703, Q.704 and Q.705. Tests for the MTP are specified in the ITU-T recommendations Q.781 for...

original video. CCIR 601 (ITU-T) H.261 (ITU-T) H.263 (ITU-T) H.264/MPEG-4 AVC (ITU-T + ISO) H.265 M-JPEG (ISO) MPEG-1 (ISO) MPEG-2 (ITU-T + ISO) MPEG-4 (ISO)...

not restricted to those modalities. ITU-T has defined several ways of referring to a MOS in Recommendation ITU-T P.800.1, depending on whether the score...