In 2008, G. 711. 1 codec, which has a scalable structure, was standardized by ITU-T.

Increasing consumer demand for streaming of high definition ( HD ) content has led the industry to develop a number of technologies such as WirelessHD or ITU-T G. hn, which are optimized for streaming HD content without forcing the user to install new networking cables.

The European Conference of Postal and Telecommunications Administrations ( CEPT ) originally standardized the E-carrier system, which revised and improved the earlier American T-carrier technology, and this has now been adopted by the International Telecommunication Union Telecommunication Standardization Sector ( ITU-T ).

The introduction of the ITU-T G. 694. 1 frequency grid in 2002 has made it easier to integrate WDM with older but more standard SONET / SDH systems.

Most national variants are based on two widely deployed national variants as standardized by ANSI and ETSI, which are in turn based on the international protocol defined by ITU-T. Each national variant has its own unique characteristics.

The desire for High definition ( HD ) content has led the industry to develop a number of technologies, such as WirelessHD or ITU-T G. hn, which are optimized for distribution of HD content between CE devices in a home.

The IETF has published Standards Track RFC 4122 that is technically equivalent with ITU-T Rec.

The ITU-T has a Telecommunication Standardization Bureau director's Ad Hoc group on IPR that produced the following definition in March 2005, which the ITU-T as a whole has endorsed for its purposes since November 2005:

: The ITU-T has a long history of open standards development.

NIST has included IEEE 1901, HomePlug AV and ITU-T G. hn as " Additional Standards Identified by NIST Subject to Further Review " for the Smart grid in the United States.

eTOM has been adopted by ITU-T as a Recommendation and published in the M. 3050. x series.

ITU-T Z. 300 series recommendations define an MML, that has been extended by Telcordia Technologies ( formerly Bellcore ) to form Transaction Language 1.

The older ITU-T G. 983 standard is based on Asynchronous Transfer Mode ( ATM ), and has therefore been referred to as APON ( ATM PON ).

The ITU-T has Withdrawn P. 861 and replaced it with P. 862 ( PESQ ) which contains an improved speech assessment algorithm.

This version has had maintenance updates since 1999 and is accompanied by a UML-Profile: ITU-T Recommendation Z. 109 ( 06 / 07 ), SDL-2000 combined with UML.

The ITU Telecommunication Standardization Sector ( ITU-T ) is one of the three sectors ( divisions or units ) of the International Telecommunication Union ( ITU ); it coordinates standards for telecommunications.

* ITU-T Test Signals for Telecommunication Systems Test Samples

The IN concepts, architecture and protocols were originally developed as standards by the ITU-T which is the standardization committee of the International Telecommunication Union, prior to this a number of telecommunications providers had proprietary IN solutions.

It is a joint effort between two international standard bodies: the International Organization for Standardization ( ISO ) and the International Telecommunication Union-Telecommunications Standards Sector ( ITU-T ).

ASN. 1 is a joint standard of the International Organization for Standardization ( ISO ), International Electrotechnical Commission ( IEC ), and International Telecommunication Union Telecommunication Standardization Sector ITU-T, originally defined in 1984 as part of CCITT X. 409: 1984.

* ITU-T E. 118 – The International Telecommunication Charge Card 2006 ITU-T

In 2007, the International Telecommunication Union, Telecommunication Standardization Sector ( ITU-T ) adopted the Common Alerting Protocol as Recommendation X. 1303.

specification documents published by the Telecommunication Standardization Sector ( ITU-T ) on behalf of the International Telecommunication Union.

One official definition approved by the International Telecommunication Union focus group on IPTV ( ITU-T FG IPTV ) is:

Between 2005 and 2011 NASK was a member of International Telecommunication Union-Telecommunication Standardization Sector ( ITU-T ).

H. 248 or Megaco or Gateway Control Protocol is a recommendation from ITU Telecommunication Standardization Sector ( ITU-T ) which defines protocols that are used between elements of a physically decomposed multimedia gateway.

There are two major standard groups: the Institute of Electrical and Electronics Engineers ( IEEE ) and the Telecommunication Standardization Sector of the International Telecommunication Union ( ITU-T ).

X. 500 is an international standard developed by the International Organization for Standardization ( ISO ) and the International Telecommunication Union ( ITU-T ).

The protocol was standardized in the International Telecommunication Union telecommunications sector ( ITU-T ) as Recommendation G. 993. 2.

* ITU Standardization Sector ( ITU-T )

Open Systems Interconnection ( OSI ) is an effort to standardize networking that was started in 1977 by the International Organization for Standardization ( ISO ), along with the ITU-T.

According to DoD documents, “ The MIL-STD-188 series may be based on, or make reference to, Joint Technical Architecture, American National Standards Institute ( ANSI ) standards, International Telecommunications Union-Telecommunication Standardization Sector ( ITU-T ) recommendations, North Atlantic Treaty Organization ( NATO ) Standardization Agreements ( STANAG ), and other standards wherever applicable .”

* an ITU-T recommendation, approved in November 1988, titled Standardization of data signalling rates for synchronous data transmission in the general switched telephone network.

H. 264 / MPEG-4 AVC is a block-oriented motion-compensation-based codec standard developed by the ITU-T Video Coding Experts Group ( VCEG ) together with the International Organization for Standardization ( ISO )/ International Electrotechnical Commission ( IEC ) joint working group, the Moving Picture Experts Group ( MPEG ).

Standardization efforts for data networking were made by ITU-T ( former CCIT ) and included X. 25 ( Packet-switched network ) and X. 400 ( Message handling system ), specifically motivated by an emerging transatlantic competition in the early 1990s.

* an ITU-T recommendation, approved in November 1988, titled Standardization of data signalling rates for synchronous data transmission on leased telephone-type circuits.

* ITU-T Action Plan for Standardization on Telecommunications for Disaster Relief and Early Warning ( TDR / EW ), 2005

Functional groups are provided according to International Telecommunication Union Telecommunication Standardization Sector ( ITU-T ) Common management information protocol ( X. 700 ) standard.

The reference model given by the ITU-T and ATM Forum for UPC and NPC is the Generic Cell Rate Algorithm ( GCRA ), which is a version of the leaky bucket algorithm.

* Adaptive Differential Pulse Code Modulation ( ADPCM ), former ITU-T G. 721, 32 kbit / s used in STE secure telephone

Standards were issued by the Comité Consultatif International Téléphonique et Télégraphique ( CCITT, now known as ITU-T ), and called " Recommendations ".

The ITU-T G. hn standard, which provides a way to create a high-speed ( up to 1 Gbit / s ) local area network using existing residential wiring ( power lines, telephone lines, and coaxial cables ), uses Selective Repeat ARQ to ensure reliable transmission over noisy media.

* The ITU-T G. hn standard, which provides a way to create a high-speed ( up to 1 Gigabit / s ) local area network using existing home wiring ( power lines, phone lines and coaxial cables ), uses CSMA / CA as a channel access method for flows that don't require guaranteed quality of service, specifically the CSMA / CARP variant.

The Intelligent Network ( IN ), is the standard network architecture specified in the ITU-T Q. 1200 series recommendations.

In 2002 the ITU standardized a channel spacing grid for use with CWDM ( ITU-T G. 694. 2 ), using the wavelengths from 1270 nm through 1610 nm with a channel spacing of 20 nm.

In the ITU-T G. hn standard, which provides a way to create a high-speed ( up to 1 Gigabit / s ) local area network using existing home wiring ( power lines, phone lines and coaxial cables ), the data link layer is divided into three sub-layers ( application protocol convergence, logical link control and medium access control ).

* ITU-T vocoder standards: G. 711 µ-law, G. 711 A-law, G. 721 ( aka G. 726 32k ), G. 722, G. 722. 2 ( aka AMR-WB ), G. 723 ( aka G. 726 24k and 40k ), G. 723. 1, G. 726, G. 729 and G. 729D

It is the first member of the H. 26x family of video coding standards in the domain of the ITU-T Video Coding Experts Group ( VCEG ), and was the first video codec that was useful in practical terms.

X. 411 | ( ISO / IEC 10021-4 ) defines the Message Transfer Service ( MTS ) and its functional component the Message Transfer Agent ( MTA ), and ITU-T Rec.

* V. 8 ( recommendation ), an ITU-T recommendation for data communication over the telephone network

The functions of MTP Level 3 may also be replaced with the Generic Signalling Transport Service described in ITU-T Recommendation Q. 2150. 0 as provided by MTP3b ( Q. 2150. 1 ), SSCOP or SSCOPMCE ( Q. 2150. 2 ) or SCTP ( Q. 2150. 3 ).

There were some design studies of a possible full-duplex PEP using echo cancellation ( as is used in V. 32 ), and this technology was proposed to the CCITT ( now known as the ITU-T ) for possible adoption as the V. fast modem standard.

In the 1990s the ITU-T, as part of their work on Telecommunications Management Network ( TMN ), further refined the FCAPS as part of the TMN recommendation on Management Functions ( M. 3400 ).

PMC-Sierra is the only supplier to support EPON ( IEEE 802. 3ah Ethernet in the First Mile ), 10G EPON ( IEEE 802. 3av ) and GPON ( ITU-T G. 984 ) standards.

* Connectionless-mode Network Protocol ( CLNP ), as specified in ITU-T Recommendation X. 233.