| H.11 | 
[Withdrawn] Characteristics of circuits in the switched telephone network
		 Deleted after its content became technically out of date
 | 
| H.12 | 
[Withdrawn] Characteristics of telephone-type leased circuits
		 Deleted after its content became technically out of date
 | 
| H.13 | 
[Withdrawn] Impulsive noise measuring instrument for telephone-type circuits
		 H.13 was an alias name of ITU-T O.71. Only this alias name was suppressed. ITU-T O.71 remains valid
 | 
| H.14 | 
[Withdrawn] Characteristics of group links for the transmission of wide-spectrum signals
		 Deleted after its content became technically out of date
 | 
| H.15 | 
[Withdrawn] Characteristics of supergroup links for the transmission of wide-spectrum signals
		 Deleted after its content became technically out of date
 | 
| H.16 | 
[Withdrawn] Characteristics of an impulsive-noise measuring instrument for wideband data transmission
		 H.16 was an alias name of ITU-T O.72. Only this alias name was suppressed. ITU-T O.72 remains valid
 | 
| H.21 | 
[Withdrawn] Composition and terminology of international voice-frequency telegraph systems
		 Deleted after its content became technically out of date
 | 
| H.22 | 
[Withdrawn] Transmission requirements of international voice-frequency telegraph links (at 50, 100 and 200 bauds)
		 Deleted after its content became technically out of date
 | 
| H.23 | 
[Withdrawn] Basic characteristics of telegraph equipments used in international voice-frequency telegraph systems
		 This Recommendation was only reproducing for information some characteristics given in ITU-T R.31 and R.35
 | 
| H.32 | 
[Withdrawn] Simultaneous communication by telephony and telegraphy on a telephone-type circuit
		 H.32 was an alias name of ITU-T R.43. Only this alias name was suppressed. ITU-T R.43 remains valid
 | 
| H.34 | 
[Withdrawn] Subdivision of the frequency band of a telephone-type circuit between telegraphy and other services
		 Deleted after its content became technically out of date
 | 
| H.43 | 
[Withdrawn] Document facsimile transmissions on leased telephone-type circuits
		 H.43 was an alias name of ITU-T T.10. Only this alias name was suppressed. ITU-T T.10 remains valid
 | 
| H.51 | 
[Withdrawn] Power levels for data transmission over telephone lines
		 H.51 was an alias name of ITU-T V.2. Only this alias name was suppressed. ITU-T V.2 remains valid
 | 
| H.52 | 
[Withdrawn] Transmission of wide-spectrum signals (data, facsimile, etc.) on wideband group links
		 Deleted after its content became technically out of date
 | 
| H.53 | 
[Withdrawn] Transmission of wide-spectrum signals (data, etc.) over wideband supergroup links
		 Deleted after its content became technically out of date
 | 
| H.100 | Visual telephone systems
		 
 | 
| H.110 | Hypothetical reference connections for videoconferencing using primary digital group transmission
		 
 | 
| H.120 | Codecs for videoconferencing using primary digital group transmission
		 
 | 
| H.130 | Frame structures for use in the international interconnection of digital codecs for videoconferencing or visual telephony
		 
 | 
| H.140 | A multipoint international videoconference system
		 
 | 
| H.200 | Framework for Recommendations for audiovisual services
		 
 | 
| H.221 | Frame structure for a 64 to 1920 kbit/s channel in audiovisual teleservices
		 
 | 
| H.222 | Information technology - Generic coding of moving pictures and associated audio information: Systems
		 Merged with ITU-T H.221 in 1990
 | 
| H.222.0 | Information technology - Generic coding of moving pictures and associated audio information: Systems
		 
 | 
| H.222.1 | Multimedia multiplex and synchronization for audiovisual communication in ATM environments
		 
 | 
| H.223 | Multiplexing protocol for low bit rate multimedia communication
		 
 | 
| H.224 | A real time control protocol for simplex applications using the H.221 LSD/HSD/MLP channels
		 
 | 
| H.225.0 | Call signalling protocols and media stream packetization for packet-based multimedia communication systems
		 
 | 
| H.225 | Call signalling protocols and media stream packetization for packet-based multimedia communication systems
		 
 | 
| H.226 | Channel aggregation protocol for multilink operation on circuit-switched networks
		 
 | 
| H.230 | Frame-synchronous control and indication signals for audiovisual systems
		 
 | 
| H.231 | Multipoint control units for audiovisual systems using digital channels up to 1920 kbit/s
		 
 | 
| H.233 | Confidentiality system for audiovisual services
		 
 | 
| H.234 | Encryption key management and authentication system for audiovisual services
		 
 | 
| H.235 | 
[Withdrawn] Security and encryption for H-series (H.323 and other H.245-based) multimedia terminals
		 ITU-T Rec. H.235 (2003) content was reorganized into H.235.1 to .7 when revised in 2005. the map can be found in Appendices IV, V, and VI of H.235.0
 | 
| H.235.0 | H.323 security: Framework for security in ITU-T H-series (ITU-T H.323 and other ITU-T H.245-based) multimedia systems
		 ITU-T Rec. H.235 (2003) content was reorganized into H.235.0 to .7 when revised in 2005. The map can be found in Appendices IV, V, and VI of H.235.0 (2005)
 | 
| H.Imp235 | Implementors Guide for H.235 V3: "Security and encryption for H-series (H.323 and other H.245-based) multimedia terminals"
		 
 | 
| H.235.1 | H.323 security: Baseline security profile
		 ITU-T Rec. H.235 (2003) content was reorganized into H.235.0 to .7 when revised in 2005. The map can be found in Appendices IV, V, and VI of H.235.0 (2005)
 | 
| H.235.2 | H.323 security: Signature security profile
		 ITU-T Rec. H.235 (2003) content was reorganized into H.235.0 to .7 when revised in 2005. The map can be found in Appendices IV, V, and VI of H.235.0 (2005)
 | 
| H.235.3 | H.323 security: Hybrid security profile
		 ITU-T Rec. H.235 (2003) content was reorganized into H.235.0 to .7 when revised in 2005. The map can be found in Appendices IV, V, and VI of H.235.0 (2005)
 | 
| H.235.4 | H.323 security: Direct and selective routed call security
		 ITU-T Rec. H.235 (2003) content was reorganized into H.235.0 to .7 when revised in 2005. The map can be found in Appendices IV, V, and VI of H.235.0 (2005)
 | 
| H.235.5 | H.323 security: Framework for secure authentication in RAS using weak shared secrets
		 ITU-T Rec. H.235 (2003) content was reorganized into H.235.0 to .7 when revised in 2005. The map can be found in Appendices IV, V, and VI of H.235.0 (2005)
 | 
| H.235.6 | H.323 security: Encryption profile with native ITU-T H.235/H.245 key management
		 ITU-T Rec. H.235 (2003) content was reorganized into H.235.0 to .7 when revised in 2005. The map can be found in Appendices IV, V, and VI of H.235.0 (2005)
 | 
| H.235.7 | H.323 security: Usage of the MIKEY key management protocol for the Secure Real Time Transport Protocol (SRTP) within H.235
		 ITU-T Rec. H.235 (2003) content was reorganized into H.235.0 to .7 when revised in 2005. The map can be found in Appendices IV, V, and VI of H.235.0 (2005)
 | 
| H.235.8 | H.323 security: Key exchange for SRTP using secure signalling channels
		 
 | 
| H.235.9 | H.323 security: Security gateway support for H.323
		 
 | 
| H.235.10 | H.323 security: Support of datagram transport layer security (DTLS) for media streams
		 
 | 
| H.239 | Role management and additional media channels for ITU-T H.300-series terminals
		 
 | 
| H.Imp239 | Implementors' Guide for ITU-T Recommendation H.239 ("Role management and additional media channels for H.300-series terminals")
		 
 | 
| H.241 | Extended video procedures and control signals for ITU-T H.300-series terminals
		 
 | 
| H.242 | System for establishing communication between audiovisual terminals using digital channels up to 2 Mbit/s
		 
 | 
| H.243 | Procedures for establishing communication between three or more audiovisual terminals using digital channels up to 1920 kbit/s
		 
 | 
| H.244 | Synchronized aggregation of multiple 64 or 56 kbit/s channels
		 
 | 
| H.245 | Control protocol for multimedia communication
		 
 | 
| H.246 | Interworking of H-series multimedia terminals with H-series multimedia terminals and voice/voiceband terminals on GSTN, ISDN and PLMN
		 
 | 
| H.247 | Multipoint extension for broadband audiovisual communication systems and terminals
		 
 | 
| H.248 | Gateway control protocol
		 H.248 was renumbered when revised on 2002-03-29. H.248 main body, Annexes A to E and Appendix I were included in H.248.1. Subsequent annexes were sequentially numbered in the series, e.g. H.248 Annex F became H.248.2
 | 
| H.Imp248 | Implementors' Guide for the H.248 Sub-series of Recommendations ("Media Gateway Control Protocol")
		 
 | 
| H.248.1 | Gateway control protocol: Version 3
		 
 | 
| H.Imp248.1 | Implementors' Guide for Recommendation H.248.1 Version 1 (03/2002) ("Media Gateway Control Protocol")
		 
 | 
| H.248.2 | Gateway control protocol: Facsimile, text conversation and call discrimination packages
		 This Recommendation was first approved and published as Annex F to H.248, and then renumbered as H.248.2 on 2002-03-29 without further modification
 | 
| H.248.3 | Gateway control protocol: User interface elements and actions packages
		 
 | 
| H.248.4 | Gateway control protocol: Transport over Stream Control Transmission Protocol (SCTP)
		 This Recommendation was first approved and published as Annex H to H.248, and then renumbered as H.248.4 on 2002-03-29 without further modification
 | 
| H.248.5 | Gateway control protocol: Transport over ATM
		 This Recommendation was first approved and published as Annex I to H.248, and then renumbered as H.248.5 on 2002-03-29 without further modification
 | 
| H.248.6 | Gateway control protocol: Dynamic Tone Definition package
		 
 | 
| H.248.7 | Gateway control protocol: Generic Announcement package
		 This Recommendation was first approved and published as Annex K to H.248, and then renumbered as H.248.7 on 2002-03-29 without further modification
 | 
| H.248.8 | Gateway control protocol: Error code and service change reason description
		 
 | 
| H.248.9 | Gateway control protocol: Advanced media server packages
		 
 | 
| H.248.10 | Gateway control protocol: Media gateway resource congestion handling package
		 This Recommendation was first approved and published as Annex M2 to H.248, and then renumbered as H.248.10 on 2002-03-29 without further modification
 | 
| H.248.11 | Gateway control protocol: Media gateway overload control package
		 
 | 
| H.248.12 | Gateway control protocol: ITU-T H.248.1 packages for ITU-T H.323 and ITU-T H.324 interworking
		 This Recommendation was first approved and published as Annex M4 to H.248, and renumbered as H.248.12 on 2002-03-29 without further modification
 | 
| H.248.13 | Gateway control protocol: Quality Alert Ceasing package
		 
 | 
| H.248.14 | Gateway control protocol: Inactivity timer package
		 
 | 
| H.248.15 | Gateway control protocol: SDP ITU-T H.248 package attribute
		 
 | 
| H.248.16 | Gateway control protocol: Enhanced digit collection packages and procedures
		 
 | 
| H.248.17 | Gateway control protocol: Line test packages
		 
 | 
| H.248.18 | Gateway control protocol: Package for support of multiple profiles
		 
 | 
| H.248.19 | Gateway control protocol: Decomposed multipoint control unit, audio, video and data conferencing packages
		 
 | 
| H.248.20 | Gateway control protocol: The use of Local and Remote Descriptors with ITU-T H.221 and ITU-T H.223 multiplexing
		 
 | 
| H.248.21 | Gateway control protocol: Semi-permanent connection handling package
		 
 | 
| H.248.22 | Gateway control protocol: Shared Risk Group package
		 
 | 
| H.248.23 | Gateway control protocol: Enhanced Alerting packages
		 
 | 
| H.248.24 | Gateway control protocol: Multi-frequency tone generation and detection packages
		 
 | 
| H.248.25 | Gateway control protocol: Basic CAS packages
		 
 | 
| H.248.26 | Gateway control protocol: Enhanced analogue lines packages
		 
 | 
| H.248.27 | Gateway control protocol: Supplemental tones packages
		 
 | 
| H.248.28 | Gateway control protocol: International CAS packages
		 
 | 
| H.248.29 | Gateway control protocol: International CAS compelled register signalling packages
		 
 | 
| H.248.30 | Gateway control protocol: RTCP extended performance metrics packages
		 
 | 
| H.248.31 | Gateway control protocol: Adaptive jitter buffer package
		 
 | 
| H.248.32 | Gateway control protocol: Detailed congestion reporting package
		 
 | 
| H.248.33 | Gateway control protocol: PCM frame spare bit package
		 
 | 
| H.248.34 | Gateway control protocol: Stimulus analogue line package
		 
 | 
| H.248.35 | Gateway control protocol: Coin-operated phone control package
		 
 | 
| H.248.36 | Gateway control protocol: Hanging Termination Detection package
		 
 | 
| H.248.37 | Gateway control protocol: IP NAPT traversal package
		 
 | 
| H.248.38 | Gateway control protocol: Base context package
		 
 | 
| H.248.39 | Gateway control protocol: ITU-T H.248 SDP parameter identification and wildcarding
		 
 | 
| H.248.40 | Gateway control protocol: Application data inactivity detection package
		 
 | 
| H.248.41 | Gateway control protocol: IP domain connection package
		 
 | 
| H.248.42 | Gateway control protocol: DCME interworking package
		 
 | 
| H.248.43 | Gateway control protocol: Packages for gate management and gate control
		 
 | 
| H.248.44 | Gateway control protocol: Multi-level precedence and pre-emption package
		 
 | 
| H.248.45 | Gateway control protocol: MGC information package
		 
 | 
| H.248.46 | Gateway control protocol: Connection capability control package
		 
 | 
| H.248.47 | Gateway control protocol: Statistic conditional reporting package
		 
 | 
| H.248.48 | Gateway control protocol: RTCP XR block reporting package
		 
 | 
| H.248.49 | Gateway control protocol: Session description protocol RFC and capabilities packages
		 
 | 
| H.248.50 | Gateway control protocol: NAT traversal toolkit packages
		 
 | 
| H.248.51 | Gateway control protocol: Termination connection model package
		 
 | 
| H.248.52 | Gateway control protocol: QoS support packages
		 
 | 
| H.248.53 | Gateway control protocol: Traffic management packages
		 
 | 
| H.248.54 | Gateway control protocol: MPLS support package
		 
 | 
| H.248.55 | Gateway control protocol: Generic pull mode package
		 
 | 
| H.248.56 | Gateway control protocol: Packages for virtual private network support
		 
 | 
| H.248.57 | Gateway control protocol: RTP control protocol package
		 
 | 
| H.248.58 | Gateway control protocol: Packages for application level H.248 statistics
		 
 | 
| H.248.59 | Gateway control protocol: Event timestamp notification package
		 
 | 
| H.248.60 | Gateway control protocol: Identification of content of communication
		 
 | 
| H.248.61 | Gateway control protocol: Packages for network level ITU-T H.248 statistics
		 
 | 
| H.248.62 | Gateway control protocol: Re-answer package
		 
 | 
| H.248.63 | Gateway control protocol: Resource management packages
		 
 | 
| H.248.64 | Gateway control protocol: IP router packages
		 
 | 
| H.248.65 | Gateway control protocol: Support of the resource reservation protocol
		 
 | 
| H.248.66 | Gateway control protocol: Packages for RTSP and ITU-T H.248 interworking
		 
 | 
| H.248.67 | Gateway control protocol: Transport mode indication package
		 
 | 
| H.248.68 | Gateway control protocol: Package for removal of digits and tones
		 
 | 
| H.248.69 | Gateway control protocol: Packages for interworking between MSRP and H.248
		 
 | 
| H.248.70 | Gateway control protocol: Dialling method information packages
		 
 | 
| H.248.71 | Gateway control protocol: RTCP support packages
		 
 | 
| H.248.72 | Gateway control protocol: ITU-T H.248 support for media-oriented negotiation acceleration (MONA)
		 
 | 
| H.248.73 | Gateway control protocol: Packages for media server control markup language and ITU-T H.248 interworking
		 
 | 
| H.248.74 | Gateway control protocol: Media resource control enhancement packages
		 
 | 
| H.248.75 | Gateway control protocol: Package Identifier Publishing and Application Package
		 
 | 
| H.248.76 | Gateway control protocol: Filter group package and guidelines
		 
 | 
| H.248.77 | Gateway control protocol: Secure real-time transport protocol (SRTP) package and procedures
		 
 | 
| H.248.78 | Gateway control protocol: Bearer-level message backhauling and application level gateway
		 
 | 
| H.248.79 | Gateway control protocol: Guidelines for packet-based streams
		 
 | 
| H.248.80 | Gateway control protocol: Usage of the revised SDP offer/answer model with ITU-T H.248
		 
 | 
| H.248.81 | Gateway control protocol: Guidelines on the use of the international emergency preference scheme (IEPS) call indicator and priority indicator in ITU-T H.248 profiles
		 
 | 
| H.248.82 | Gateway control protocol: Explicit congestion notification support
		 
 | 
| H.248.83 | Gateway control protocol: Media gateway instance package
		 
 | 
| H.248.84 | Gateway control protocol: NAT traversal for peer-to-peer services
		 
 | 
| H.248.85 | Gateway control protocol: Usage of loopback in ITU-T H.248
		 
 | 
| H.248.86 | Gateway control protocol: ITU-T H.248 support for deep packet inspection
		 
 | 
| H.248.87 | Gateway control protocol: Guidelines on the use of ITU-T H.248 capabilities for performance monitoring in RTP networks in ITU-T H.248 profiles
		 
 | 
| H.248.88 | Gateway control protocol: RTP topology dependent RTCP handling by ITU-T H.248 media gateways with IP terminations
		 
 | 
| H.248.89 | Gateway control protocol: TCP support packages
		 
 | 
| H.248.90 | Gateway control protocol: ITU-T H.248 packages for control of transport security using transport layer security (TLS)
		 
 | 
| H.248.91 | Gateway control protocol: Guidelines on the use of ITU-T H.248 capabilities for transport security in TLS networks in ITU-T H.248 profiles
		 
 | 
| H.248.92 | Gateway control protocol: Stream endpoint interlinkage package
		 
 | 
| H.248.93 | Gateway control protocol: ITU-T H.248 support for control of transport security using the datagram transport layer security (DTLS) protocol
		 
 | 
| H.248.94 | Gateway control protocol: Web-based real-time communication services - ITU-T H.248 protocol support and profile guidelines
		 
 | 
| H.248.95 | Gateway control protocol: ITU-T H.248 support for RTP multiplexing
		 
 | 
| H.248.96 | Gateway Control Protocol: ITU-T H.248 Stream grouping and aggregation
		 
 | 
| H.248.97 | Gateway Control Protocol: ITU-T H.248 support for control of SCTP bearer connections
		 
 | 
| H.248.98 | Gateway control protocol: Support of remote media pause and resume
		 
 | 
| H.249 | Extended user input indications
		 
 | 
| H.261 | Video codec for audiovisual services at p x 64 kbit/s
		 
 | 
| H.262 | Information technology - Generic coding of moving pictures and associated audio information: Video
		 
 | 
| H.263 | Video coding for low bit rate communication
		 
 | 
| H.Imp263 | Implementors' Guide for ITU-T Recommendation H.263
		 
 | 
| H.264 | Advanced video coding for generic audiovisual services
		 
 | 
| H.264.1 | Conformance specification for ITU-T H.264 advanced video coding
		 
 | 
| H.264.2 | Reference software for ITU-T H.264 advanced video coding
		 
 | 
| H.Imp264 | Implementors' Guide for ITU-T Recommendation H.264
		 
 | 
| H.265 | High efficiency video coding
		 
 | 
| H.265.1 | Conformance specification for ITU-T H.265 high efficiency video coding
		 
 | 
| H.265.2 | Reference software for ITU-T H.265 high efficiency video coding
		 
 | 
| H.266 | Versatile video coding
		 
 | 
| H.266.1 | Conformance specification for ITU-T H.266 versatile video coding
		 
 | 
| H.266.2 | Reference software for ITU-T H.266 versatile video coding
		 
 | 
| H.271 | Video back-channel messages for conveyance of status information and requests from a video receiver to a video sender
		 
 | 
| H.272 | Procedures and values for video gamma compensation in multimedia systems
		 
 | 
| H.273 | Coding-independent code points for video signal type identification
		 
 | 
| H.274 | Versatile supplemental enhancement information messages for coded video bitstreams
		 
 | 
| H.281 | A far end camera control protocol for videoconferences using H.224
		 
 | 
| H.282 | 
[Withdrawn] Remote device control protocol for multimedia applications
		 Since ITU-T H.281 is the protocol used by all shipping video conferencing products, including those using SIP and H.323 as call signalling protocol, it was decided to delete on 2010-02-12 the unused Recommendations ITU-T H.282, H.283 and T.136 in order to avoid any confusion
 | 
| H.283 | 
[Withdrawn] Remote device control logical channel transport
		 Since ITU-T H.281 is the protocol used by all shipping video conferencing products, including those using SIP and H.323 as call signalling protocol, it was decided to delete on 2010-02-12 the unused Recommendations ITU-T H.282, H.283 and T.136 in order to avoid any confusion
 | 
| H.310 | Broadband audiovisual communication systems and terminals
		 
 | 
| H.320 | Narrow-band visual telephone systems and terminal equipment
		 
 | 
| H.Imp320 | Implementors Guide for Recommendations of the H.320 System ("Narrow-band visual telephone systems and terminal equipment"):H.320, H.221, H.224, H.230, H.242, H.243
		 
 | 
| H.321 | Adaptation of H.320 visual telephone terminals to B-ISDN environments
		 
 | 
| H.322 | Visual telephone systems and terminal equipment for local area networks which provide a guaranteed quality of service
		 
 | 
| H.323 | Packet-based multimedia communications systems
		 
 | 
| H.Imp323 | Implementors' Guide for Recommendations of the H.323 System (Packet-based multimedia communications systems): H.323, H.225.0, H.245, H.246, H.283, H.341, H.450 Series, H.460 Series, and H.500 Series
		 
 | 
| H.324 | Terminal for low bit-rate multimedia communication
		 
 | 
| H.Imp324 | Revised Implementor's Guide for the ITU-T H.324 Recommendation series
		 
 | 
| H.331 | Broadcasting type audiovisual multipoint systems and terminal equipment
		 
 | 
| H.332 | H.323 extended for loosely coupled conferences
		 
 | 
| H.341 | Multimedia management information base
		 This Recommendation includes one diskette containing the formal descriptions of Annexes A, B, C, D and E for the multimedia management information base.
 | 
| H.350 | Directory services architecture for multimedia conferencing
		 
 | 
| H.350.1 | Directory services architecture for H.323
		 
 | 
| H.350.2 | Directory services architecture for H.235
		 
 | 
| H.350.3 | Directory services architecture for H.320
		 
 | 
| H.350.4 | Directory services architecture for SIP
		 
 | 
| H.350.5 | Directory services architecture for non-standard protocols
		 
 | 
| H.350.6 | Directory services architecture for call forwarding and preferences
		 
 | 
| H.350.7 | Directory services architecture for XMPP
		 
 | 
| H.Imp350 | Implementors' Guide for ITU-T H.350 Sub-series of Recommendations ("Directory Services Architecture for Multimedia Conferencing")
		 
 | 
| H.351 | Semantic web interface for multimedia terminal and system directories (SWIM-D)
		 
 | 
| H.360 | An architecture for end-to-end QoS control and signalling
		 
 | 
| H.361 | End-to-end quality of service (QoS) and service priority signalling in H.323 systems
		 
 | 
| H.362 | A framework for adaptive end-to-end QoS control based on variable bit-rate codecs in wireless networks
		 
 | 
| H.420 | Telepresence system architecture
		 
 | 
| H.430.1 | Requirements for immersive live experience (ILE) services
		 
 | 
| H.430.2 | Architectural framework for immersive live experience (ILE) services
		 
 | 
| H.430.3 | Service scenario for immersive live experience (ILE)
		 
 | 
| H.430.4 | Service configuration, media transport protocols, signalling information of MPEG media transport for immersive live experience (ILE) systems
		 
 | 
| H.430.5 | Reference models for immersive live experience (ILE) presentation environments
		 
 | 
| H.430.6 | Media transport protocols, signalling information of haptic transmission for immersive live experience (ILE) systems
		 
 | 
| H.430.7 | Requirements of interactive immersive services
		 
 | 
| H.430.8 | Functional architecture of interactive immersive services (IIS) systems
		 
 | 
| H.431.1 | Functional architecture for cloud virtual reality systems
		 
 | 
| H.450.1 | Generic functional protocol for the support of supplementary services in ITU-T H.323 systems
		 
 | 
| H.450.2 | Call transfer supplementary service for ITU-T H.323 systems
		 
 | 
| H.450.3 | Call diversion supplementary service for H.323
		 
 | 
| H.450.4 | Call hold supplementary service for ITU-T H.323 systems
		 
 | 
| H.450.5 | Call park and call pickup supplementary services in ITU-T H.323 systems
		 Covering note, May 2000: Erratum
 | 
| H.450.6 | Call waiting supplementary service for H.323
		 
 | 
| H.450.7 | Message waiting indication supplementary service for ITU-T H.323 systems
		 
 | 
| H.450.8 | Name identification supplementary service for ITU-T H.323 systems
		 
 | 
| H.450.9 | Call completion supplementary services for H.323
		 
 | 
| H.450.10 | Call offering supplementary services for H.323
		 
 | 
| H.450.11 | Call intrusion supplementary service for H.323
		 
 | 
| H.450.12 | Common Information Additional Network Feature for H.323
		 
 | 
| H.460.1 | Guidelines for the use of the generic extensible framework
		 
 | 
| H.460.2 | Number portability interworking between ITU-T H.323 and switched circuit networks
		 
 | 
| H.460.3 | Circuit maps within H.323 systems
		 
 | 
| H.460.4 | Call priority designation and country/international network of call origination identification for H.323 priority calls
		 
 | 
| H.460.5 | H.225.0 transport of multiple Q.931 information elements of the same type
		 
 | 
| H.460.6 | Extended Fast Connect feature
		 
 | 
| H.460.7 | Digit maps within ITU-T H.323 systems
		 
 | 
| H.460.8 | Querying for alternate routes within H.323 systems
		 
 | 
| H.460.9 | Support for online QoS-monitoring reporting within H.323 systems
		 
 | 
| H.460.10 | Call party category within H.323 systems
		 
 | 
| H.460.11 | Delayed call establishment within H.323 systems
		 
 | 
| H.460.12 | Glare control indicator within H.323 systems
		 
 | 
| H.460.13 | Called user release control within H.323 systems
		 
 | 
| H.460.14 | Support for Multi-Level Precedence and Preemption (MLPP) within H.323 systems
		 
 | 
| H.460.15 | Call signalling transport channel suspension and redirection within H.323 systems
		 
 | 
| H.460.16 | Multiple-message release sequence capability within H.323 systems
		 
 | 
| H.460.17 | Using H.225.0 call signalling connection as transport for H.323 RAS messages
		 
 | 
| H.460.18 | Traversal of ITU-T H.323 signalling across network address translators and firewalls
		 
 | 
| H.460.19 | Traversal of ITU-T H.323 media across network address translators and firewalls
		 
 | 
| H.460.20 | Location number within H.323 systems
		 
 | 
| H.460.21 | Message broadcast for H.323 systems
		 
 | 
| H.460.22 | Negotiation of security protocols to protect ITU-T H.225.0 call signalling messages
		 
 | 
| H.460.23 | Network address translator and firewall device determination in ITU-T H.323 systems
		 
 | 
| H.460.24 | Point-to-point media through network address translators and firewalls within ITU-T H.323 systems
		 
 | 
| H.460.25 | Transport of geographic information in ITU-T H.323 systems
		 
 | 
| H.460.26 | Using ITU-T H.225.0 call signalling connection as transport for media
		 
 | 
| H.460.27 | End-to-end session identifier for ITU-T H.323 systems
		 
 | 
| H.501 | Protocol for mobility management and intra/inter-domain communication in multimedia systems
		 
 | 
| H.510 | Mobility for H.323 multimedia systems and services
		 
 | 
| H.530 | Symmetric security procedures for H.323 mobility in H.510
		 
 | 
| H.550 | Architecture and functional entities of vehicle gateway platforms
		 
 | 
| H.551 | Architecture of vehicular multimedia systems
		 
 | 
| H.552 | Implementation of vehicle multimedia systems
		 
 | 
| H.560 | Communications interface between external applications and a vehicle gateway platform
		 
 | 
| H.610 | Full service VDSL - System architecture and customer premises equipment
		 
 | 
| H.611 | Full-Service VDSL - Operations, Administration Maintenance & Provision aspects
		 
 | 
| H.621 | Architecture of a system for multimedia information access triggered by tag-based identification
		 
 | 
| H.622 | A generic home network architecture with support for multimedia services
		 
 | 
| H.622.1 | Architecture and functional requirements for home networks supporting IPTV services
		 
 | 
| H.622.2 | Service capabilities and framework for virtual home networks
		 
 | 
| H.623 | Web of things service architecture
		 
 | 
| H.625 | Architecture for network-based speech-to-speech translation services
		 
 | 
| H.626 | Architectural requirements for a video surveillance system
		 
 | 
| H.626.1 | Architecture for mobile visual surveillance
		 
 | 
| H.626.2 | Architecture for cloud storage in visual surveillance
		 
 | 
| H.626.3 | Architecture for visual surveillance system interworking
		 
 | 
| H.626.4 | Architecture for a point-to-point visual surveillance system
		 
 | 
| H.626.5 | Architecture for intelligent video surveillance systems
		 
 | 
| H.626.6 | Architecture for big data application in video surveillance systems
		 
 | 
| H.626.7 | Functional architecture for machine vision systems in smart manufacturing
		 
 | 
| H.626.8 | Protocols for feature-based distributed intelligent systems
		 
 | 
| H.627 | Signalling and protocols for a video surveillance system
		 
 | 
| H.627.1 | Protocols for mobile visual surveillance
		 
 | 
| H.627.2 | Requirements and protocols for home surveillance systems
		 
 | 
| H.627.3 | Protocols for intelligent video surveillance systems
		 
 | 
| H.629.1 | Scenarios, framework and metadata for digitalized artwork images display system
		 
 | 
| H.641 | SNMP-based sensor network management framework
		 
 | 
| H.642.1 | Multimedia information access triggered by tag-based identification - Identification scheme
		 
 | 
| H.642.2 | Multimedia information access triggered by tag-based identification - Registration procedures for identifiers
		 
 | 
| H.642.3 | Information technology - Automatic identification and data capture technique - Identifier resolution protocol for multimedia information access triggered by tag-based identification
		 
 | 
| H.643.1 | Architecture for the deployment of information-centric networks
		 
 | 
| H.644.1 | Functional architecture for virtual content delivery networks
		 
 | 
| H.644.2 | Virtual content delivery network - Network virtualization
		 
 | 
| H.644.3 | Functional architecture of multimedia content delivery networks
		 
 | 
| H.644.4 | Architecture for mobile/multi-access edge computing enabled content delivery networks
		 
 | 
| H.644.5 | Functional architecture of content request routing service in multimedia content delivery networks
		 
 | 
| H.644.6 | Architecture for video distribution systems
		 
 | 
| H.644.7 | Functional architecture for media processing services
		 
 | 
| H.644.8 | Requirements and architecture for audio and video processing for media processing services
		 
 | 
| H.701 | Content delivery error recovery for IPTV services
		 
 | 
| H.702 | Accessibility profiles for IPTV systems
		 
 | 
| H.703 | Enhanced user interface framework for IPTV terminal devices
		 
 | 
| H.704 | Enhanced user interface framework for IPTV terminal device - Gesture control interface
		 
 | 
| H.705.1 | Layered specification for the IPTV service platform functional architecture based on open service capabilities
		 
 | 
| H.705.2 | Requirements for live streaming systems based on the QUIC transport protocol
		 
 | 
| H.705.3 | Requirements and architecture for open IPTV multicast service
		 
 | 
| H.720 | Overview of IPTV terminal devices and end systems
		 
 | 
| H.721 | IPTV terminal devices: Basic model
		 
 | 
| H.722 | IPTV terminal device: Full-fledged model
		 
 | 
| H.723 | IPTV terminal device: Mobile model
		 
 | 
| H.724 | IPTV terminal device: Interworking-enabled model of multiple devices
		 
 | 
| H.725 | IPTV terminal device: Virtualized model
		 
 | 
| H.730 | Web-based terminal middleware for IPTV services
		 
 | 
| H.740 | Application event handling for IPTV services
		 
 | 
| H.741.0 | IPTV application event handling: Overall aspects of audience measurement for IPTV services
		 
 | 
| H.741.1 | IPTV application event handling: Audience measurement operations for IPTV services
		 
 | 
| H.741.2 | IPTV application event handling: Data structures of audience measurement for IPTV services
		 
 | 
| H.741.3 | IPTV application event handling: Audience measurement for IPTV distributed content services
		 
 | 
| H.741.4 | IPTV application event handling: Transport mechanisms for audience measurement
		 
 | 
| H.741.5 | Application event handling: Overall aspects of personalized IPTV services
		 
 | 
| H.742.0 | Use of video sensor devices for IPTV services: Architecture and requirements
		 
 | 
| H.750 | High-level specification of metadata for IPTV services
		 
 | 
| H.751 | Metadata for rights information interoperability in IPTV services
		 
 | 
| H.752 | Multimedia content provisioning interface for IPTV services
		 
 | 
| H.753 | Scene-based metadata for IPTV services
		 
 | 
| H.760 | Overview of multimedia application frameworks for IPTV services
		 
 | 
| H.761 | Nested context language (NCL) and Ginga-NCL
		 
 | 
| H.762 | Lightweight interactive multimedia environment (LIME) for IPTV services
		 
 | 
| H.763.1 | Cascading style sheets for IPTV services
		 
 | 
| H.763.2 | Scalable vector graphics for IPTV services
		 
 | 
| H.763.3 | HTML for IPTV services
		 
 | 
| H.764 | IPTV services enhanced script language
		 
 | 
| H.765 | Packaged IPTV application (widget) service
		 
 | 
| H.766 | Lua for IPTV services
		 
 | 
| H.770 | Mechanisms for service discovery and selection for IPTV services
		 
 | 
| H.771 | SIP-based discovery of IPTV services
		 
 | 
| H.772 | IPTV terminal device discovery
		 
 | 
| H.780 | Digital signage: Service requirements and IPTV-based architecture
		 
 | 
| H.781 | Digital signage: Functional architecture
		 
 | 
| H.782 | Digital signage: Metadata
		 
 | 
| H.783 | Digital signage: Audience measurement services
		 
 | 
| H.784 | Digital signage: Display device control interface
		 
 | 
| H.785.0 | Digital signage: Requirements of disaster information services
		 
 | 
| H.785.1 | Digital signage: Service requirements and a reference model on information services in public places via an interoperable service platform
		 
 | 
| H.810 | Interoperability design guidelines for personal connected health systems: Introduction
		 
 | 
| H.811 | Interoperability design guidelines for personal connected health systems: Personal Health Devices interface
		 
 | 
| H.812 | Interoperability design guidelines for personal connected health systems: Services interface
		 
 | 
| H.812.1 | Interoperability design guidelines for personal connected health systems: Services interface: Observation Upload capability
		 
 | 
| H.812.2 | Interoperability design guidelines for personal connected health systems: Services interface: Questionnaire capability
		 
 | 
| H.812.3 | Interoperability design guidelines for personal connected health systems: Services interface: Capability Exchange capability
		 
 | 
| H.812.4 | Interoperability design guidelines for personal connected health systems: Services interface: Authenticated Persistent Session capability
		 
 | 
| H.813 | Interoperability design guidelines for personal connected health systems: Healthcare Information System interface
		 
 | 
| H.820 | Conformance of ITU-T H.810 personal health system: Conformity assessment test plan
		 
 | 
| H.821 | Conformance of ITU-T H.810 personal health system: Healthcare information system interface
		 
 | 
| H.830.1 | Conformance of ITU-T H.810 personal health system: Services interface Part 1: Web services interoperability: Health & Fitness Service sender
		 
 | 
| H.830.2 | Conformance of ITU-T H.810 personal health system: Services interface Part 2: Web services interoperability: Health & Fitness Service receiver
		 
 | 
| H.830.3 | Conformance of ITU-T H.810 personal health system: Services interface Part 3: SOAP/ATNA: Health & Fitness Service sender
		 
 | 
| H.830.4 | Conformance of ITU-T H.810 personal health system: Services interface Part 4: SOAP/ATNA: Health & Fitness Service receiver
		 
 | 
| H.830.5 | Conformance of ITU-T H.810 personal health system: Services interface Part 5: PCD-01 HL7 Messages: Health & Fitness Service sender
		 
 | 
| H.830.6 | Conformance of ITU-T H.810 personal health system: Services interface Part 6: PCD-01 HL7 Messages: Health & Fitness Service receiver
		 
 | 
| H.830.7 | Conformance of ITU-T H.810 personal health system: Services interface Part 7: Consent Management: Health & Fitness Service sender
		 
 | 
| H.830.8 | Conformance of ITU-T H.810 personal health system: Services interface Part 8: Consent Management: Health & Fitness Service receiver
		 
 | 
| H.830.9 | Conformance of ITU-T H.810 personal health system: Services interface Part 9: hData Observation Upload: Health & Fitness Service sender
		 
 | 
| H.830.10 | Conformance of ITU-T H.810 personal health system: Services interface Part 10: hData Observation Upload: Health & Fitness Service receiver
		 
 | 
| H.830.11 | Conformance of ITU-T H.810 personal health system: Services interface Part 11: Questionnaires: Health & Fitness Service sender
		 
 | 
| H.830.12 | Conformance of ITU-T H.810 personal health system: Services interface Part 12: Questionnaires: Health & Fitness Service receiver
		 
 | 
| H.830.13 | Conformance of ITU-T H.810 personal health system: Services interface Part 13: Capability Exchange: Health & Fitness Service sender
		 
 | 
| H.830.14 | Conformance of ITU-T H.810 personal health system: Services interface Part 14: Capability Exchange: Health & Fitness Service receiver
		 
 | 
| H.830.15 | Conformance of ITU-T H.810 personal health system: Services interface Part 15: FHIR Observation Upload: Health & Fitness Service sender
		 
 | 
| H.830.16 | Conformance of ITU-T H.810 personal health system: Services interface Part 16: FHIR Observation Upload: Health & Fitness Service receiver
		 
 | 
| H.830.17 | Conformance of ITU-T H.810 personal health system: Services interface Part 17: Personal Health Device Observation Upload (POU) Sender
		 
 | 
| H.830.18 | Conformance of ITU-T H.810 personal health system: Services interface Part 18: Personal Health Device Observation Upload (POU) Receiver
		 
 | 
| H.831 | Conformance of ITU-T H.810 personal health devices: WAN interface Part 1: Web services interoperability: Sender
		 
 | 
| H.832 | Conformance of ITU-T H.810 personal health devices: WAN interface Part 2: Web services interoperability: Receiver
		 
 | 
| H.833 | Conformance of ITU-T H.810 personal health devices: WAN interface Part 3: SOAP/ATNA: Sender
		 
 | 
| H.834 | Conformance of ITU-T H.810 personal health devices: WAN interface Part 4: SOAP/ATNA: Receiver
		 
 | 
| H.835 | Conformance of ITU-T H.810 personal health devices: WAN interface Part 5: PCD-01 HL7 messages: Sender
		 
 | 
| H.836 | Conformance of ITU-T H.810 personal health devices: WAN interface Part 6: PCD-01 HL7 messages: Receiver
		 
 | 
| H.837 | Conformance of ITU-T H.810 personal health devices: WAN interface Part 7: Consent management: Sender
		 
 | 
| H.838 | Conformance of ITU-T H.810 personal health devices: WAN interface Part 8: Consent management: Receiver
		 
 | 
| H.840 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface: USB host
		 
 | 
| H.841 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 1: Optimized Exchange Protocol: Personal Health Device
		 
 | 
| H.842 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 2: Optimized Exchange Protocol: Personal Health Gateway
		 
 | 
| H.843 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 3: Continua Design Guidelines: Personal Health Device
		 
 | 
| H.844 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 4: Continua Design Guidelines: Personal Health Gateway
		 
 | 
| H.845.1 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 5A: Weighing scales
		 
 | 
| H.845.2 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 5B: Glucose meter
		 
 | 
| H.845.3 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 5C: Pulse oximeter
		 
 | 
| H.845.4 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 5D: Blood pressure monitor
		 
 | 
| H.845.5 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 5E: Thermometer
		 
 | 
| H.845.6 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 5F: Cardiovascular fitness and activity monitor
		 
 | 
| H.845.7 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 5G: Strength fitness equipment
		 
 | 
| H.845.8 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 5H: Independent living activity hub
		 
 | 
| H.845.9 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 5I: Adherence monitor
		 
 | 
| H.845.10 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 5J: Insulin pump
		 
 | 
| H.845.11 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 5K: Peak expiratory flow monitor
		 
 | 
| H.845.12 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 5L: Body composition analyser
		 
 | 
| H.845.13 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 5M: Basic electrocardiograph
		 
 | 
| H.845.14 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 5N: International normalized ratio
		 
 | 
| H.845.15 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 5O: Sleep apnoea breathing therapy equipment
		 
 | 
| H.845.16 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 5P: Continuous glucose monitor
		 
 | 
| H.845.17 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 5Q: Power status monitor
		 
 | 
| H.846 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 6: Personal Health Gateway
		 
 | 
| H.847 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 7: Continua Design Guidelines for Bluetooth Low Energy: Personal Health Devices
		 
 | 
| H.848 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 8: Continua Design Guidelines for Bluetooth Low Energy: Personal Health Gateway
		 
 | 
| H.849 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 9: Transcoding for Bluetooth Low Energy: Personal Health Devices
		 
 | 
| H.850 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 10: Transcoding for Bluetooth Low Energy: Personal Health Gateway - General requirements
		 
 | 
| H.850.1 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 10A: Transcoding for Bluetooth Low Energy: Personal Health Gateway - Thermometer
		 
 | 
| H.850.2 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 10B: Transcoding for Bluetooth Low Energy: Personal Health Gateway - Blood pressure
		 
 | 
| H.850.3 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 10C: Transcoding for Bluetooth Low Energy: Personal Health Gateway - Heart-rate
		 
 | 
| H.850.4 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 10D: Transcoding for Bluetooth Low Energy: Personal Health Gateway - Glucose meter
		 
 | 
| H.850.5 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 10E: Transcoding for Bluetooth Low Energy: Personal Health Gateway - Weighing scales
		 
 | 
| H.850.6 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 10F: Transcoding for Bluetooth Low Energy: Personal Health Gateway - Pulse oximeter
		 
 | 
| H.850.7 | Conformance of ITU-T H.810 personal health system: Personal Health Devices interface Part 10G: Transcoding for Bluetooth Low Energy: Personal Health Gateway - Continuous glucose monitoring
		 
 | 
| H.860 | Multimedia e-health data exchange services: Data schema and supporting services
		 
 | 
| H.861.0 | Requirements on communication platform for multimedia brain information
		 
 | 
| H.861.1 | Requirements on establishing brain healthcare quotients
		 
 | 
| H.862.0 | Requirements and framework for ICT sleep management service models
		 
 | 
| H.862.1 | Data model for sleep management services
		 
 | 
| H.862.2 | Framework of annotation methods for biosignal data
		 
 | 
| H.862.3 | Requirements of voice management interface for human-care services
		 
 | 
| H.862.4 | Framework for information and communication technology olfactory function test systems
		 
 | 
| H.862.5 | Emotion enabled multimodal user interface based on artificial neural networks
		 
 | 
| H.862.6 | Functional requirements for counselling services based on artificial emotional intelligence
		 
 | 
| H.862.7 | Interoperability framework for sleep management services
		 
 | 
| H.862.8 | Requirements and framework of the occupational health service platform
		 
 | 
| H.870 | Guidelines for safe listening devices/systems
		 
 | 
| H.871 | Safe listening guidelines for personal sound amplifiers
		 
 | 
| H.872 | Safe listening for video gameplay and esports
		 
 | 
| H.Sup1 | Application profile - Sign language and lip-reading real-time conversation using low bit rate video communication
		 This Supplement includes one CD-ROM containing the video clip "Irene" to be used as test material for video coding of sign language.
 | 
| H.Sup2 | ITU-T H.248.x sub-series packages guide - Release 16
		 
 | 
| H.Sup3 | Operator requirements for full-service VDSL in ITU-T Recommendations H.610 and H.611
		 
 | 
| H.Sup4 | Repository of generic parameters for ITU-T H.460.x sub-series Recommendations
		 
 | 
| H.Sup5 | Gateway control protocol: Guidelines for resource management of 'IP Address & Port' resources for H.248 RTP terminations
		 H Suppl. 5 was an alias name of G Suppl. 5 (1984). Only this alias name was suppressed. ITU-T G Suppl. 5 remains valid
 | 
| H.Sup6 | Control load quantum for decomposed gateways
		 
 | 
| H.Sup7 | Gateway control protocol: Establishment procedures for the H.248 MGC-MG control association
		 
 | 
| H.Sup8 | Gateway control protocol: Guidelines for synchronized time in ITU-T H.248 domains
		 
 | 
| H.Sup9 | Gateway control protocol: Operation of H.248 with H.225.0, SIP, and ISUP in support of emergency telecommunications service (ETS)/international emergency preference scheme (IEPS)
		 
 | 
| H.Sup10 | Proxy-aided NAT/FW traversal scheme for ITU-T H.323 multimedia systems
		 
 | 
| H.Sup11 | Analysis of class-based home network QoS solutions
		 
 | 
| H.Sup12 | Gateway control protocol: Priority traffic treatment by ITU-T H.248 gateways
		 
 | 
| H.Sup13 | Gateway control protocol: Common ITU-T H.248 terminology - Release 2
		 
 | 
| H.Sup14 | Gateway control protocol: SDP codepoints for gateway control - Release 2
		 
 | 
| H.Sup15 | Conversion and coding practices for HDR/WCG Y'CbCr 4:2:0 video with PQ transfer characteristics
		 
 | 
| H.Sup16 | 
[Withdrawn] Out-of-band characteristics of signals applied to leased telephone-type circuits
		 This Supplement was withdrawn because its content was out of date
 | 
| H.Sup17 | Guide for addressing accessibility in standards
		 
 | 
| H.Sup18 | Signalling, backward compatibility and display adaptation for HDR/WCG video coding
		 
 | 
| H.Sup19 | Usage of video signal type code points
		 
 | 
| H.Sup20 | Practice for intelligent traffic sensing device deployment on the roadside
		 
 | 
| H.Sup21 | Film grain synthesis technology for video applications
		 
 |