2005-2008 ITU-T SG 15 Recommendations

G series : Transmission systems and media, digital systems and networks

G100-G199 : International telephone connections and circuits

G180-G189 : Protection and restoration of transmission systems

G.180 : Characteristics of N + M type direct transmission restoration systems for use on digital and analogue sections, links or equipment

G.181 : Characteristics of 1 + 1 type restoration systems for use on digital transmission links

G200-G299 : General characteristics common to all analogue carrier-transmission systems

G210-G219 : Definitions and general considerations

G.211 : Make-up of a carrier link

G.212 : Hypothetical reference circuits for analogue systems

G.213 : Interconnection of systems in a main repeater station

G.214 : Line stability of cable systems

G.215 : Hypothetical reference circuit of 5000 km for analogue systems

G220-G229 : General Recommendations

G.221 : Overall recommendations relating to carrier-transmission systems

G.222 : Noise objectives for design of carrier-transmission systems of 2500 km

G.223 : Assumptions for the calculation of noise on hypothetical reference circuits for telephony

G.224 : Maximum permissible value for the absolute power level (power referred to one milliwatt) of a signalling pulse

G.225 : Recommendations relating to the accuracy of carrier frequencies

G.226 : Noise on a real link

G.227 : Conventional telephone signal

G.228 : Measurement of circuit noise in cable systems using a uniform-spectrum random noise loading

G.229 : Unwanted modulation and phase jitter

G230-G239 : Translating equipment used on various carrier-transmission systems

G.230 : Measuring methods for noise produced by modulating equipment and through-connection filters

G.231 : Arrangement of carrier equipment

G.232 : 12-channel terminal equipments

G.233 : Recommendations concerning translating equipments

G240-G299 : Utilization of groups, supergroups, etc.

G.241 : Pilots on groups, supergroups, etc.

G.242 : Through-connection of groups, supergroups, etc.

G.243 : Protection of pilots and additional measuring frequencies at points where there is a through-connection

G300-G399 : Individual characteristics of international carrier telephone systems on metallic lines

G320-G329 : Carrier telephone systems on unloaded symmetric cable pairs, providing groups or supergroups

G.322 : General characteristics recommended for systems on symmetric pair cables

G.325 : General characteristics recommended for systems providing 12 telephone carrier circuits on a symmetric cable pair [(12 + 12) systems]

G330-G339 : Carrier systems on 2.6/9.5 mm coaxial cable pairs

G.332 : 12 MHz systems on standardized 2.6/9.5 mm coaxial cable pairs

G.333 : 60 MHz systems on standardized 2.6/9.5 mm coaxial cable pairs

G.334 : 18 MHz systems on standardized 2.6/9.5 mm coaxial cable pairs

G340-G349 : Carrier systems on 1.2/4.4 mm coaxial cable pairs

G.341 : 1.3 MHz systems on standardized 1.2/4.4 mm coaxial cable pairs

G.343 : 4 MHz systems on standardized 1.2/4.4 mm coaxial cable pairs

G.344 : 6 MHz systems on standardized 1.2/4.4 mm coaxial cable pairs

G.345 : 12 MHz systems on standardized 1.2/4.4 mm coaxial cable pairs

G.346 : 18 MHz systems on standardized 1.2/4.4 mm coaxial cable pairs

G350-G399 : Additional Recommendations on cable systems

G.352 : Interconnection of coaxial carrier systems of different designs

G400-G449 : General characteristics of international carrier telephone systems on radio-relay or satellite links and interconnection with metallic lines

G400-G419 : General Recommendations

G.411 : Use of radio-relay systems for international telephone circuits

G420-G429 : Interconnection of radio-relay links with carrier systems on metallic lines

G.421 : Methods of interconnection

G.422 : Interconnection at audio-frequencies

G.423 : Interconnection at the baseband frequencies of frequency-division multiplex radio-relay systems

G430-G439 : Hypothetical reference circuits

G.431 : Hypothetical reference circuits for frequency-division multiplex radio-relay systems

G440-G449 : Circuit noise

G.441 : Permissible circuit noise on frequency-division multiplex radio-relay systems

G.442 : Radio-relay system design objectives for noise at the far end of a hypothetical reference circuit with reference to telegraphy transmission

G450-G499 : Coordination of radiotelephony and line telephony

G450-G469 : Radiotelephone circuits

G.451 : Use of radio links in international telephone circuits

G600-G699 : Transmission media and optical systems characteristics

G600-G609 : General

G.601 : Terminology for cables

G.602 : Reliability and availability of analogue cable transmission systems and associated equipments

G610-G619 : Symmetric cable pairs

G.611 : Characteristics of symmetric cable pairs for analogue transmission

G.612 : Characteristics of symmetric cable pairs designed for the transmission of systems with bit rates of the order of 6 to 34 Mbit/s

G.613 : Characteristics of symmetric cable pairs usable wholly for the transmission of digital systems with a bit rate of up to 2 Mbit/s

G.614 : Characteristics of symmetric pair star-quad cables designed earlier for analogue transmission systems and being used now for digital system transmission at bit rates of 6 to 34 Mbit/s

G620-G629 : Land coaxial cable pairs

G.621 : Characteristics of 0.7/2.9 mm coaxial cable pairs

G.622 : Characteristics of 1.2/4.4 mm coaxial cable pairs

G.623 : Characteristics of 2.6/9.5 mm coaxial cable pairs

G630-G639 : Submarine cables

G.631 : Types of submarine cable to be used for systems with line frequencies of less than about 45 MHz

G640-G649 : Free space optical systems

G.640 : Co-location longitudinally compatible interfaces for free space optical systems

G650-G659 : Optical fibre cables

G.650.1 : Definitions and test methods for linear, deterministic attributes of single-mode fibre and cable

G.650.2 : Definitions and test methods for statistical and non-linear related attributes of single-mode fibre and cable

G.650.3 : Test methods for installed single-mode optical fibre cable links

G.651 : Characteristics of a 50/125 �m multimode graded index optical fibre cable

G.651.1 : Characteristics of a 50/125 �m multimode graded index optical fibre cable for the optical access network

G.652 : Characteristics of a single-mode optical fibre and cable

G.653 : Characteristics of a dispersion-shifted single-mode optical fibre and cable

G.654 : Characteristics of a cut-off shifted single-mode optical fibre and cable

G.655 : Characteristics of a non-zero dispersion-shifted single-mode optical fibre and cable

G.656 : Characteristics of a fibre and cable with non-zero dispersion for wideband optical transport

G.657 : Characteristics of a bending loss insensitive single mode optical fibre and cable for the access network

G660-G679 : Characteristics of optical components and subsystems

G.661 : Definitions and test methods for the relevant generic parameters of optical amplifier devices and subsystems

G.662 : Generic characteristics of optical amplifier devices and subsystems

G.663 : Application related aspects of optical amplifier devices and subsystems

G.664 : Optical safety procedures and requirements for optical transport systems

G.665 : Generic characteristics of Raman amplifiers and Raman amplified subsystems

G.666 : Characteristics of PMD compensators and PMD compensating receivers

G.667 : Characteristics of adaptive chromatic dispersion compensators

G.671 : Transmission characteristics of optical components and subsystems

G680-G699 : Characteristics of optical systems

G.680 : Physical transfer functions of optical network elements

G.691 : Optical interfaces for single channel STM-64 and other SDH systems with optical amplifiers

G.692 : Optical interfaces for multichannel systems with optical amplifiers

G.693 : Optical interfaces for intra-office systems

G.694.1 : Spectral grids for WDM applications: DWDM frequency grid

G.694.2 : Spectral grids for WDM applications: CWDM wavelength grid

G.695 : Optical interfaces for coarse wavelength division multiplexing applications

G.696.1 : Longitudinally compatible intra-domain DWDM applications

G.697 : Optical monitoring for DWDM systems

G.698.1 : Multichannel DWDM applications with single-channel optical interfaces

G.698.2 : Amplified multichannel DWDM applications with single channel optical interfaces

G700-G799 : Digital terminal equipments

G700-G709 : General

G.701 : Vocabulary of digital transmission and multiplexing, and pulse code modulation (PCM) terms

G.702 : Digital hierarchy bit rates

G.703 : Physical/electrical characteristics of hierarchical digital interfaces

G.704 : Synchronous frame structures used at 1544, 6312, 2048, 8448 and 44 736 kbit/s hierarchical levels

G.705 : Characteristics of plesiochronous digital hierarchy (PDH) equipment functional blocks

G.706 : Frame alignment and cyclic redundancy check (CRC) procedures relating to basic frame structures defined in Recommendation G.704

G.707/Y.1322 : Network node interface for the synchronous digital hierarchy (SDH)

G.708 : Sub STM-0 network node interface for the synchronous digital hierarchy (SDH)

G.709/Y.1331 : Interfaces for the Optical Transport Network (OTN)

G710-G719 : Coding of analogue signals by pulse code modulation

G.712 : Transmission performance characteristics of pulse code modulation channels

G730-G739 : Principal characteristics of primary multiplex equipment

G.731 : Primary PCM multiplex equipment for voice frequencies

G.732 : Characteristics of primary PCM multiplex equipment operating at 2048 kbit/s

G.733 : Characteristics of primary PCM multiplex equipment operating at 1544 kbit/s

G.734 : Characteristics of synchronous digital multiplex equipment operating at 1544 kbit/s

G.735 : Characteristics of primary PCM multiplex equipment operating at 2048 kbit/s and offering synchronous digital access at 384 kbit/s and/or 64 kbit/s

G.736 : Characteristics of a synchronous digital multiplex equipment operating at 2048 kbit/s

G.737 : Characteristics of an external access equipment operating at 2048 kbit/s offering synchronous digital access at 384 kbit/s and/or 64 kbit/s

G.738 : Characteristics of primary PCM multiplex equipment operating at 2048 kbit/s and offering synchronous digital access at 320 kbit/s and/or 64 kbit/s

G.739 : Characteristics of an external access equipment operating at 2048 kbit/s offering synchronous digital access at 320 kbit/s and/or 64 kbit/s

G740-G749 : Principal characteristics of second order multiplex equipment

G.741 : General considerations on second order multiplex equipments

G.742 : Second order digital multiplex equipment operating at 8448 kbit/s and using positive justification

G.743 : Second order digital multiplex equipment operating at 6312 kbit/s and using positive justification

G.744 : Second order PCM multiplex equipment operating at 8448 kbit/s

G.745 : Second order digital multiplex equipment operating at 8448 kbit/s and using positive/zero/negative justification

G.746 : Characteristics of second order PCM multiplex equipment operating at 6312 kbit/s

G.747 : Second order digital multiplex equipment operating at 6312 kbit/s and multiplexing three tributaries at 2048 kbit/s

G750-G759 : Principal characteristics of higher order multiplex equipment

G.751 : Digital multiplex equipments operating at the third order bit rate of 34 368 kbit/s and the fourth order bit rate of 139 264 kbit/s and using positive justification

G.752 : Characteristics of digital multiplex equipments based on a second order bit rate of 6312 kbit/s and using positive justification

G.753 : Third order digital multiplex equipment operating at 34 368 kbit/s and using positive/zero/negative justification

G.754 : Fourth order digital multiplex equipment operating at 139 264 kbit/s and using positive/zero/negative justification

G.755 : Digital multiplex equipment operating at 139 264 kbit/s and multiplexing three tributaries at 44 736 kbit/s

G770-G779 : Operations, administration and maintenance features of transmission equipment

G.772 : Protected monitoring points provided on digital transmission systems

G.773 : Protocol suites for Q-interfaces for management of transmission systems

G.774 : Synchronous digital hierarchy (SDH) � Management information model for the network element view

G.774.1 : Synchronous digital hierarchy (SDH) � Bidirectional performance monitoring for the network element view

G.774.2 : Synchronous digital hierarchy (SDH) � Configuration of the payload structure for the network element view

G.774.3 : Synchronous digital hierarchy (SDH) � Management of multiplex-section protection for the network element view

G.774.4 : Synchronous digital hierarchy (SDH) � Management of the subnetwork connection protection for the network element view

G.774.5 : Synchronous digital hierarchy (SDH) � Management of connection supervision functionality (HCS/LCS) for the network element view

G.774.6 : Synchronous digital hierarchy (SDH) � Unidirectional performance monitoring for the network element view

G.774.7 : Synchronous digital hierarchy (SDH) � Management of lower order path trace and interface labelling for the network element view

G.774.8 : Synchronous digital hierarchy (SDH) � Management of radio-relay systems for the network element view

G.774.9 : Synchronous digital hierarchy (SDH) � Configuration of linear multiplex-section protection for the network element view

G.774.10 : Synchronous digital hierarchy (SDH) � Multiplex Section (MS) shared protection ring management for the network element view

G.775 : Loss of Signal (LOS), Alarm Indication Signal (AIS) and Remote Defect Indication (RDI) defect detection and clearance criteria for PDH signals

G780-G789 : Principal characteristics of multiplexing equipment for the synchronous digital hierarchy

G.780/Y.1351 : Terms and definitions for synchronous digital hierarchy (SDH) networks

G.781 (draft) : Synchronization layer functions

G.781 : Synchronization layer functions

G.783 : Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks

G.784 : Management aspects of synchronous digital hierarchy (SDH) transport network elements

G.785 : Characteristics of a flexible multiplexer in a synchronous digital hierarchy environment

G790-G799 : Other terminal equipment

G.791 : General considerations on transmultiplexing equipments

G.792 : Characteristics common to all transmultiplexing equipments

G.793 : Characteristics of 60-channel transmultiplexing equipments

G.794 : Characteristics of 24-channel transmultiplexing equipments

G.795 : Characteristics of codecs for FDM assemblies

G.796 : Characteristics of a 64 kbit/s cross-connect equipment with 2048 kbit/s access ports

G.797 : Characteristics of a flexible multiplexer in a plesiochronous digital hierarchy environment

G.798 : Characteristics of optical transport network hierarchy equipment functional blocks

G.799.1/Y.1451.1 : Functionality and interface specifications for GSTN transport network equipment for interconnecting GSTN and IP networks

G800-G899 : Digital networks

G800-G809 : General aspects

G.800 : Unified functional architecture of transport networks

G.803 : Architecture of transport networks based on the synchronous digital hierarchy (SDH)

G.804 : ATM cell mapping into plesiochronous digital hierarchy (PDH)

G.805 : Generic functional architecture of transport networks

G.806 : Characteristics of transport equipment � Description methodology and generic functionality

G.808.1 : Generic protection switching � Linear trail and subnetwork protection

G.808.2 (draft) : Generic protection switching � Ring protection

G.809 : Functional architecture of connectionless layer networks

G810-G819 : Design objectives for digital networks

G.810 : Definitions and terminology for synchronization networks

G.811 : Timing characteristics of primary reference clocks

G.812 : Timing requirements of slave clocks suitable for use as node clocks in synchronization networks

G.813 : Timing characteristics of SDH equipment slave clocks (SEC)

G820-G829 : Quality and availability targets

G.820/I.351/Y.1501 : Relationships among ISDN, IP-based network and physical layer performance Recommendations

G.821 : Error performance of an international digital connection operating at a bit rate below the primary rate and forming part of an Integrated Services Digital Network

G.822 : Controlled slip rate objectives on an international digital connection

G.823 : The control of jitter and wander within digital networks which are based on the 2048 kbit/s hierarchy

G.824 : The control of jitter and wander within digital networks which are based on the 1544 kbit/s hierarchy

G.825 : The control of jitter and wander within digital networks which are based on the synchronous digital hierarchy (SDH)

G.826 : End-to-end error performance parameters and objectives for international, constant bit-rate digital paths and connections

G.827 : Availability performance parameters and objectives for end-to-end international constant bit-rate digital paths

G.828 : Error performance parameters and objectives for international, constant bit-rate synchronous digital paths

G.829 : Error performance events for SDH multiplex and regenerator sections

G830-G839 : Network capabilities and functions

G.831 : Management capabilities of transport networks based on the synchronous digital hierarchy (SDH)

G.832 : Transport of SDH elements on PDH networks � Frame and multiplexing structures

G840-G849 : SDH network characteristics

G.841 : Types and characteristics of SDH network protection architectures

G.842 : Interworking of SDH network protection architectures

G870-G879 : Optical transport networks

G.870/Y.1352 : Terms and definitions for optical transport networks (OTN)

G.871/Y.1301 : Framework of Optical Transport Network Recommendations

G.872 : Architecture of optical transport networks

G.873.1 : Optical Transport Network (OTN): Linear protection

G.873.2 (draft) : OTN network protection architectures � Rring ODUk protection

G.874 : Management aspects of optical transport network elements

G.874.1 : Optical transport network (OTN): Protocol-neutral management information model for the network element view

G900-G999 : Digital sections and digital line system

G900-G909 : General

G.901 : General considerations on digital sections and digital line systems

G.902 : Framework Recommendation on functional access networks (AN) � Architecture and functions, access types, management and service node aspects

G910-G919 : Parameters for optical fibre cable systems

G.911 : Parameters and calculation methodologies for reliability and availability of fibre optic systems

G920-G929 : Digital sections at hierarchical bit rates based on a bit rate of 2048 kbit/s

G.921 : Digital sections based on the 2048 kbit/s hierarchy

G940-G949 : Digital line systems provided by FDM transmission bearers

G.941 : Digital line systems provided by FDM transmission bearers

G950-G959 : Digital line systems

G.950 : General considerations on digital line systems

G.951 : Digital line systems based on the 1544 kbit/s hierarchy on symmetric pair cables

G.952 : Digital line systems based on the 2048 kbit/s hierarchy on symmetric pair cables

G.953 : Digital line systems based on the 1544 kbit/s hierarchy on coaxial pair cables

G.954 : Digital line systems based on the 2048 kbit/s hierarchy on coaxial pair cables

G.955 : Digital line systems based on the 1544 kbit/s and the 2048 kbit/s hierarchy on optical fibre cables

G.957 : Optical interfaces for equipments and systems relating to the synchronous digital hierarchy

G.959.1 : Optical transport network physical layer interfaces

G960-G969 : Digital section and digital transmission systems for customer access to ISDN

G.960 : Access digital section for ISDN basic rate access

G.961 : Digital transmission system on metallic local lines for ISDN basic rate access

G.962 : Access digital section for ISDN primary rate at 2048 kbit/s

G.963 : Access digital section for ISDN primary rate at 1544 kbit/s

G.964 : V-Interfaces at the digital local exchange (LE) � V5.1 interface (based on 2048 kbit/s) for the support of access network (AN)

G.965 : V-interfaces at the digital local exchange (LE) � V5.2 interface (based on 2048 kbit/s) for the support of access network (AN)

G.966 : Access digital section for B-ISDN

G.967.1 : VB5.1 reference point specification

G.967.2 : VB5.2 reference point specification

G.967.3 : Protocol implementation conformance statements for interfaces at VB5 reference points

G970-G979 : Optical fibre submarine cable systems

G.971 : General features of optical fibre submarine cable systems

G.972 : Definition of terms relevant to optical fibre submarine cable systems

G.973 : Characteristics of repeaterless optical fibre submarine cable systems

G.974 : Characteristics of regenerative optical fibre submarine cable systems

G.975 : Forward error correction for submarine systems

G.975.1 : Forward error correction for high bit-rate DWDM submarine systems

G.976 : Test methods applicable to optical fibre submarine cable systems

G.977 : Characteristics of optically amplified optical fibre submarine cable systems

G.978 : Characteristics of optical fibre submarine cables

G980-G989 : Optical line systems for local and access networks

G.981 : PDH optical line systems for the local network

G.982 : Optical access networks to support services up to the ISDN primary rate or equivalent bit rates

G.983.1 : Broadband optical access systems based on Passive Optical Networks (PON)

G.983.2 : ONT management and control interface specification for B-PON

G.983.3 : A broadband optical access system with increased service capability by wavelength allocation

G.983.4 : A broadband optical access system with increased service capability using dynamic bandwidth assignment

G.983.5 : A broadband optical access system with enhanced survivability

G.984.1 : Gigabit-capable passive optical networks (G-PON): General characteristics

G.984.2 : Gigabit-capable Passive Optical Networks (G-PON): Physical Media Dependent (PMD) layer specification

G.984.3 : Gigabit-capable Passive Optical Networks (G-PON): Transmission convergence layer specification

G.984.4 : Gigabit-capable Passive Optical Networks (G-PON): ONT management and control interface specification

G.984.5 : Gigabit-capable Passive Optical Networks (G-PON): Enhancement band

G.984.6 : Gigabit-capable Passive Optical Networks (G-PON): Reach extension

G.985 : 100 Mbit/s point-to-point Ethernet based optical access system

G990-G999 : Access networks

G.991.1 : High bit rate digital subscriber line (HDSL) transceivers

G.991.2 : Single-pair high-speed digital subscriber line (SHDSL) transceivers

G.992.1 : Asymmetric digital subscriber line (ADSL) transceivers

G.992.2 : Splitterless asymmetric digital subscriber line (ADSL) transceivers

G.992.3 : Asymmetric digital subscriber line transceivers 2 (ADSL2)

G.992.4 : Splitterless asymmetric digital subscriber line transceivers 2 (splitterless ADSL2)

G.992.5 : Asymmetric digital subscriber line (ADSL) transceivers � Extended bandwidth ADSL2 (ADSL2plus)

G.993.1 : Very high speed digital subscriber line transceivers (VDSL)

G.993.2 : Very high speed digital subscriber line transceivers 2 (VDSL2)

G.994.1 : Handshake procedures for digital subscriber line (DSL) transceivers

G.995.1 : Overview of digital subscriber line (DSL) Recommendations

G.996.1 : Test procedures for digital subscriber line (DSL) transceivers

G.997.1 : Physical layer management for digital subscriber line (DSL) transceivers

G.998.1 : ATM-based multi-pair bonding

G.998.2 : Ethernet-based multi-pair bonding

G.998.3 : Multi-pair bonding using time-division inverse multiplexing

G7000-G7999 : Data over Transport � Generic aspects

G7000-G7099 : General

G.7041/Y.1303 (draft) : Generic framing procedure (GFP)

G.7041/Y.1303 : Generic framing procedure (GFP)

G.7042/Y.1305 : Link capacity adjustment scheme (LCAS) for virtual concatenated signals

G.7043/Y.1343 : Virtual concatenation of plesiochronous digital hierarchy (PDH) signals

G7700-G7799 : Transport network control aspects

G.7710/Y.1701 : Common equipment management function requirements

G.7712/Y.1703 : Architecture and specification of data communication network

G.7713/Y.1704 : Distributed Call and Connection Management (DCM)

G.7713.1/Y.1704.1 : Distributed Call and Connection Management (DCM) based on PNNI

G.7713.2/Y.1704.2 : Distributed Call and Connection Management: Signalling mechanism using GMPLS RSVP-TE

G.7713.3/Y.1704.3 : Distributed Call and Connection Management: Signalling mechanism using GMPLS CR-LDP

G.7714/Y.1705 : Generalized automatic discovery for transport entities

G.7714.1/Y.1705.1 : Protocol for automatic discovery in SDH and OTN networks

G.7715/Y.1706 : Architecture and requirements for routing in the automatically switched optical networks

G.7715.1/Y.1706.1 : ASON routing architecture and requirements for link state protocols

G.7715.2/Y.1706.2 : ASON routing architecture and requirements for remote route query

G.7718/Y.1709 : Framework for ASON management

G.7718.1/Y.1709.1 : Protocol-neutral management information model for the control plane view

G8000-G8999 : Packet over Transport aspects

G8000-G8099 : Ethernet over Transport aspects

G.8001/Y.1354 : Terms and definitions for Ethernet frames over Transport

G.8010/Y.1306 : Architecture of Ethernet layer networks

G.8011/Y.1307 : Ethernet over Transport � Ethernet services framework

G.8011.1/Y.1307.1 : Ethernet private line service

G.8011.2/Y.1307.2 : Ethernet virtual private line service

G.8012/Y.1308 : Ethernet UNI and Ethernet NNI

G.8021/Y.1341 : Characteristics of Ethernet transport network equipment functional blocks

G.8031/Y.1342 : Ethernet linear protection switching

G.8032/Y.1344 : Ethernet ring protection switching

G.8040/Y.1340 : GFP frame mapping into Plesiochronous Digital Hierarchy (PDH)

G.8051/Y.1345 : Management aspects of the Ethernet-over-Transport (EoT) capable network element

G.8080/Y.1304 : Architecture for the automatically switched optical network (ASON)

G.8081/Y.1353 : Terms and definitions for Automatically Switched Optical Networks (ASON)

G8100-G8199 : MPLS over Transport aspects

G.8101/Y.1355 : Terms and definitions for transport MPLS

G.8110/Y.1370 : MPLS layer network architecture

G.8110.1/Y.1370.1 : Architecture of Transport MPLS (T-MPLS) layer network

G.8112/Y.1371 : Interfaces for the Transport MPLS (T-MPLS) hierarchy

G.8121/Y.1381 : Characteristics of Transport MPLS equipment functional blocks

G.8131/Y.1382 : Linear protection switching for transport MPLS (T-MPLS) networks

G.8151/Y.1374 : Management aspects of the T-MPLS network element

G8200-G8299 : Quality and availability targets

G.8201 : Error performance parameters and objectives for multi-operator international paths within the Optical Transport Network (OTN)

G.8251 : The control of jitter and wander within the optical transport network (OTN)

G.8261/Y.1361 : Timing and synchronization aspects in packet networks

G.8262/Y.1362 : Timing characteristics of synchronous Ethernet equipment slave clock (EEC)

G.8264/Y.1364 (draft) : Timing distribution through packet networks

G8600-G8699 : Service Management

G.8601/Y.1391 : Architecture of service management in multi-bearer, multi-carrier environment

G9000-G9999 : Access networks

G9950-G9999 : In premises networks

G.9951 : Phoneline networking transceivers � Foundation

G.9952 : Phoneline networking transceivers � Payload format and link layer requirements

G.9953 : Phoneline networking transceivers � Isolation function

G.9954 : Home networking transceivers � Enhanced physical, media access, and link layer specifications

G supplements : Supplements to the Series G Recommendations

G Suppl. 4 : Certain methods of avoiding the transmission of excessive noise between interconnected systems

G Suppl. 5 : Measurement of the load of telephone circuits under field conditions

G Suppl. 7 : Loss-frequency response of channel-translating equipment used in some countries for international circuits

G Suppl. 8 : Method proposed by the Belgian telephone administration for interconnection between coaxial and symmetric pair systems

G Suppl. 17 : Group-delay distortion performance of terminal equipment

G Suppl. 19 : Digital crosstalk measurement (method used by the Administrations of France, the Netherlands and Spain)

G Suppl. 22 : Mathematical models of multiplex signals

G Suppl. 26 : Estimating the signal load margin of FDM wideband amplifier equipment and transmission systems

G Suppl. 27 : Interference from external sources

G Suppl. 28 : Application of transmultiplexers, FDM codecs, data-in-voice (DIV) systems and data-over-voice (DOV) systems during the transition from an analogue to a digital network

G Suppl. 32 : Transfer of alarm information on 60-channel transmultiplexing equipment

G Suppl. 34 : Temperature in underground containers for the installation of repeaters

G Suppl. 35 : Guidelines concerning the measurement of wander

G Suppl. 36 : Jitter and wander accumulation in digital networks

G Suppl. 37 : ITU-T Recommendation G.763 digital circuit multiplication equipment (DCME) tutorial and dimensioning

G Suppl. 38 : Variable bit rate calculations for the ITU-T Recommendation G.767 Digital Circuit Multiplication Equipment (DCME)

G Suppl. 39 : Optical system design and engineering considerations

G Suppl. 40 : Optical fibre and cable Recommendations and standards guideline

G Suppl. 41 : Design guidelines for optical fibre submarine cable systems

G Suppl. 42 : Guide on the use of the ITU-T Recommendations related to optical technology

G Suppl. 43 : Transport of IEEE 10GBASE-R in optical transport networks (OTN)

G Suppl. 44 : Test plan to verify B-PON interoperability

G-100 series Suppl. 29 : Planning of mixed analogue-digital circuits (chains, connections)

G-100 series Suppl. 31 : Principles of determining an impedance strategy for the local network

G-100 series Suppl. 32 : Transmission aspects of digital mobile radio systems

I series : Integrated services digital network

I300-I399 : Overall network aspects and functions

I320-I329 : Reference models

I.326 : Functional architecture of transport networks based on ATM

I350-I359 : Performance objectives

I.351/G.820/Y.1501 : Relationships among ISDN, IP-based network and physical layer performance Recommendations

I400-I499 : ISDN user-network interfaces

I410-I429 : Application of I-series Recommendations to ISDN user-network interfaces

I.414 : Overview of Recommendations on layer 1 for ISDN and B-ISDN customer accesses

I430-I439 : Layer 1 Recommendations

I.430 : Basic user-network interface � Layer 1 specification

I.431 : Primary rate user-network interface � Layer 1 specification

I.432.1 : General characteristics

I.432.2 : 155 520 kbit/s and 622 080 kbit/s operation

I.432.3 : 1544 kbit/s and 2048 kbit/s operation

I.432.4 : 51 840 kbit/s operation

I.432.5 : 25 600 kbit/s operation

I600-I699 : Maintenance principles

I.630 : ATM protection switching

I700-I799 : B-ISDN equipment aspects

I730-I739 : ATM equipment

I.731 : Types and general characteristics of ATM equipment

I.732 : Functional characteristics of ATM equipment

I740-I749 : Transport functions

I.741 : Interworking and interconnection between ATM and switched telephone networks for the transmission of speech, voiceband data and audio signals

I760-I769 : Multiplexing aspects

I.761 : Inverse multiplexing for ATM (IMA)

I.762 : ATM over fractional physical links

Q series : Switching and signalling

Q500-Q599 : Digital exchanges

Q500-Q509 : Introduction and field of application

Q.500 : Digital local, combined, transit and international exchanges � Introduction and field of application

Q510-Q539 : Exchange interfaces, functions and connections

Q.511 : Exchange interfaces towards other exchanges

Q.512 : Digital exchange interfaces for subscriber access

Q.521 : Digital exchange functions

Q.522 : Digital exchange connections, signalling and ancillary functions

Q540-Q549 : Design objectives and measurement

Q.541 : Digital exchange design objectives � General

Q.542 : Digital exchange design objectives � Operations and maintenance

Q.543 : Digital exchange performance design objectives

Q.544 : Digital exchange measurements

Q550-Q559 : Transmission characteristics

Q.551 : Transmission characteristics of digital exchanges

Q.552 : Transmission characteristics at 2-wire analogue interfaces of digital exchanges

Q.553 : Transmission characteristics at 4-wire analogue interfaces of digital exchanges

Q.554 : Transmission characteristics at digital interfaces of digital exchanges

R series : Telegraph transmission

R1-R19 : Telegraph distortion

R.2 : Element error rate

R.4 : Methods for the separate measurements of the degrees of various types of telegraph distortion

R.5 : Observation conditions recommended for routine distortion measurements on international telegraph circuits

R.9 : How the laws governing distribution of distortion should be arrived at

R.11 : Calculation of the degree of distortion of a telegraph circuit in terms of the degrees of distortion of the component links

R20-R39 : Voice-frequency telegraphy

R.20 : Telegraph modem for subscriber lines

R.21 : 9600 bit/s modem standardized for use in the telegraph TDM system

R.22 : Data over voice 19 200 bit/s modem standardized for use on telephone network subscriber lines

R.30 : Transmission characteristic for international VFT links

R.31 : Standardization of AMVFT systems for a modulation rate of 50 bauds

R.35 : Standardization of FMVFT systems for a modulation rate of 50 bauds

R.35 bis : 50-baud wideband VFT systems

R.36 : Coexistence of 50-baud/120-Hz channels, 100-baud/240-Hz channels, 200-baud/360-Hz or 480-Hz channels on the same voice-frequency telegraph system

R.37 : Standardization of FMVFT systems for a modulation rate of 100 bauds

R.38 A : Standardization of FMVFT system for a modulation rate of 200 bauds with channels spaced at 480 Hz

R.38 B : Standardization of FMVFT systems for a modulation rate of 200 bauds with channels spaced at 360 Hz usable on long intercontinental bearer circuits generally used with a 3-kHz spacing

R.39 : Voice-frequency telegraphy on radio circuits

R40-R49 : Special cases of alternating current telegraphy

R.40 : Coexistence in the same cable of telephony and super-telephone telegraphy

R.43 : Simultaneous communication by telephone and telegraph on a telephone-type circuit

R.44 : 6-unit synchronous time-division 2-3-channel multiplex telegraph system for use over FMVFT channels spaced at 120 Hz for connection to standardized teleprinter networks

R.49 : Interband telegraphy over open-wire 3-channel carrier systems

R50-R59 : Transmission quality

R.50 : Tolerable limits for the degree of isochronous distortion of code-independent 50-baud telegraph circuits

R.51 : Standardized text for distortion testing of the code-independent elements of a complete circuit

R.51 bis : Standardized text for testing the elements of a complete circuit

R.52 : Standardization of international texts for the measurement of the margin of start-stop equipment

R.53 : Permissible limits for the degree of distortion on an international 50-baud/120-Hz VFT channel (frequency and amplitude modulation)

R.54 : Conventional degree of distortion tolerable for standardized start-stop 50-baud systems

R.55 : Conventional degree of distortion

R.56 : Telegraph distortion limits to be quoted in Recommendations for equipment and transmission plans

R.57 : Standard limits of transmission quality for planning code-independent international point-to-point telegraph communications and switched networks using 50-baud start-stop equipment

R.58 : Standard limits of transmission quality for the gentex and telex networks

R.58 bis : Limits on signal transfer delay for telegraph, telex and gentex networks

R.59 : Interface requirements for 50-baud start-stop telegraph transmission in the maritime mobile satellite service

R60-R69 : Correction of signals

R.60 : Conditions to be fulfilled by regenerative repeaters for start-stop signals of International Telegraph Alphabet No. 2

R.62 : Siting of regenerative repeaters in international telex circuits

R70-R99 : Telegraph maintenance

R.70 : Designation of international telegraph circuits

R.70 bis : Numbering of international VFT channels

R.71 : Organization of the maintenance of international telegraph circuits

R.72 : Periodicity of maintenance measurements to be carried out on the channels of international VFT systems

R.73 : Maintenance measurements to be carried out on VFT systems

R.74 : Choice of type of telegraph distortion-measuring equipment

R.75 : Maintenance measurements on code-independent international sections of international telegraph circuits

R.75 bis : Maintenance measurements of character error rate on international sections of international telegraph circuits

R.76 : Reserve channels for maintenance measurements on channels of international VFT systems

R.77 : Use of bearer circuits for voice-frequency telegraphy

R.78 : Pilot channel for AMVFT systems

R.79 : Automatic tests of transmission quality on telegraph circuits between switching centres

R.80 : Causes of disturbances to signals in VFT channels and their effect on telegraph distortion

R.81 : Maximum acceptable limit for the duration of interruption of telegraph channels arising from failure of the normal power supplies

R.82 : Appearance of false calling and clearing signals in circuits operated by switched teleprinter services

R.83 : Changes of level and interruptions in VFT channels

R.90 : Organization for locating and clearing faults in international telegraph switched networks

R.91 : General maintenance aspects for the maritime satellite telex service

R100-R119 : Time-division multiplexing

R.100 : Transmission characteristics of international TDM links

R.101 : Code and speed dependent TDM system for anisochronous telegraph and data transmission using bit interleaving

R.102 : 4800 bit/s code and speed dependent and hybrid TDM systems for anisochronous telegraph and data transmission using bit interleaving

R.103 : Code and speed-dependent TDM 600 bit/s system for use in point-to-point or branch-line muldex configurations

R.105 : Duplex muldex concentrator, connecting a group of gentex and telex subscribers to a telegraph exchange by assigning virtual channels to time slots of a bit-interleaved TDM system

R.106 : Muldex unit for telegraph and low speed data transmission using TDM bit interleaving with an aggregate bit rate higher than 4800 bit/s

R.111 : Code and speed independent TDM system for anisochronous telegraph and data transmission

R.112 : TDM hybrid system for anisochronous telegraph and data transmission using bit interleaving

R.113 : Combined muldex for telegraphy and synchronous data transmission

R.114 : Numbering of international TDM channels

R.115 : Maintenance loops for TDM-systems

R.116 : Maintenance tests to be carried out on international TDM systems

R.117 : End-to-end error performance for telegraph, telex and gentex connections involving regenerative equipment

R.118 : Performance and availability monitoring in regenerative TDM

R120-R139 : Transmission quality above 50 bauds

R.120 : Tolerable limits for the degree of isochronous distortion of code-independent telegraph circuits operating at modulation rates of 75, 100 and 200 bauds

R.121 : Standard limits of transmission quality for start-stop user classes of service 1 and 2 on anisochronous data networks

R.122 : Summary of transmission plans for rates up to 300 bauds

R140-R149 : Definitions

R.140 : Definitions of essential technical terms in the field of telegraph transmission

R150-R159 : Availability and reliability of international telegraph circuits

R.150 : Automatic protection switching of dual diversity bearers

V series : Data communication over the telephone network

V35-V39 : Wideband modems

V.38 : A 48/56/64 kbit/s data circuit-terminating equipment standardized for use on digital point-to-point leased circuits

V300-V399 : Modems on digital circuits

V.300 : A 128 (144) kbit/s data circuit-terminating equipment standardized for use on digital point-to-point leased circuits

X series : Data networks, open system communications and security

X1-X199 : Public data networks

X50-X89 : Transmission, signalling and switching

X.50 : Fundamental parameters of a multiplexing scheme for the international interface between synchronous data networks

X.50 bis : Fundamental parameters of a 48-kbit/s user data signalling rate transmission scheme for the international interface between synchronous data networks

X.51 : Fundamental parameters of a multiplexing scheme for the international interface between synchronous data networks using 10-bit envelope structure

X.51 bis : Fundamental parameters of a 48-kbit/s user data signalling rate transmission scheme for the international interface between synchronous data networks using 10-bit envelope structure

X.52 : Method of encoding anisochronous signals into a synchronous user bearer

X.53 : Numbering of channels on international multiplex links at 64 kbit/s

X.54 : Allocation of channels on international multiplex links at 64 kbit/s

X.55 : Interface between synchronous data networks using a 6 + 2 envelope structure and single channel per carrier (SCPC) satellite channels

X.56 : Interface between synchronous data networks using an 8 + 2 envelope structure and single channel per carrier (SCPC) satellite channels

X.57 : Method of transmitting a single lower speed data channel on a 64 kbit/s data stream

X.58 : Fundamental parameters of a multiplexing scheme for the international interface between synchronous non-switched data networks using no envelope structure

X.85/Y.1321 : IP over SDH using LAPS

X.86/Y.1323 : Ethernet over LAPS

X.87/Y.1324 : Multiple services ring based on RPR

Y series : Global information infrastructure, Internet protocol aspects and next-generation networks

Y1000-Y1999 : Internet protocol aspects

Y1300-Y1399 : Transport

Y.1301/G.871 : Framework of Optical Transport Network Recommendations

Y.1303/G.7041 (draft) : Generic framing procedure (GFP)

Y.1303/G.7041 : Generic framing procedure (GFP)

Y.1304/G.8080 : Architecture for the automatically switched optical network (ASON)

Y.1305/G.7042 : Link capacity adjustment scheme (LCAS) for virtual concatenated signals

Y.1306/G.8010 : Architecture of Ethernet layer networks

Y.1307/G.8011 : Ethernet over Transport � Ethernet services framework

Y.1307.1/G.8011.1 : Ethernet private line service

Y.1307.2/G.8011.2 : Ethernet virtual private line service

Y.1308/G.8012 : Ethernet UNI and Ethernet NNI

Y.1321/X.85 : IP over SDH using LAPS

Y.1322/G.707 : Network node interface for the synchronous digital hierarchy (SDH)

Y.1323/X.86 : Ethernet over LAPS

Y.1324/X.87 : Multiple services ring based on RPR

Y.1331/G.709 : Interfaces for the Optical Transport Network (OTN)

Y.1340/G.8040 : GFP frame mapping into Plesiochronous Digital Hierarchy (PDH)

Y.1341/G.8021 : Characteristics of Ethernet transport network equipment functional blocks

Y.1342/G.8031 : Ethernet linear protection switching

Y.1343/G.7043 : Virtual concatenation of plesiochronous digital hierarchy (PDH) signals

Y.1344/G.8032 : Ethernet ring protection switching

Y.1345/G.8051 : Management aspects of the Ethernet-over-Transport (EoT) capable network element

Y.1351/G.780 : Terms and definitions for synchronous digital hierarchy (SDH) networks

Y.1352/G.870 : Terms and definitions for optical transport networks (OTN)

Y.1353/G.8081 : Terms and definitions for Automatically Switched Optical Networks (ASON)

Y.1354/G.8001 : Terms and definitions for Ethernet frames over Transport

Y.1355/G.8101 : Terms and definitions for transport MPLS

Y.1361/G.8261 : Timing and synchronization aspects in packet networks

Y.1362/G.8262 : Timing characteristics of synchronous Ethernet equipment slave clock (EEC)

Y.1364/G.8264 (draft) : Timing distribution through packet networks

Y.1370/G.8110 : MPLS layer network architecture

Y.1370.1/G.8110.1 : Architecture of Transport MPLS (T-MPLS) layer network

Y.1371/G.8112 : Interfaces for the Transport MPLS (T-MPLS) hierarchy

Y.1374/G.8151 : Management aspects of the T-MPLS network element

Y.1381/G.8121 : Characteristics of Transport MPLS equipment functional blocks

Y.1382/G.8131 : Linear protection switching for transport MPLS (T-MPLS) networks

Y.1391/G.8601 : Architecture of service management in multi-bearer, multi-carrier environment

Y1400-Y1499 : Interworking

Y.1451.1/G.799.1 : Functionality and interface specifications for GSTN transport network equipment for interconnecting GSTN and IP networks

Y1500-Y1599 : Quality of service and network performance

Y.1501/G.820/I.351 : Relationships among ISDN, IP-based network and physical layer performance Recommendations

Y1700-Y1799 : Operation, administration and maintenance

Y.1701/G.7710 : Common equipment management function requirements

Y.1703/G.7712 : Architecture and specification of data communication network

Y.1704/G.7713 : Distributed Call and Connection Management (DCM)

Y.1704.1/G.7713.1 : Distributed Call and Connection Management (DCM) based on PNNI

Y.1704.2/G.7713.2 : Distributed Call and Connection Management: Signalling mechanism using GMPLS RSVP-TE

Y.1704.3/G.7713.3 : Distributed Call and Connection Management: Signalling mechanism using GMPLS CR-LDP

Y.1705/G.7714 : Generalized automatic discovery for transport entities

Y.1705.1/G.7714.1 : Protocol for automatic discovery in SDH and OTN networks

Y.1706/G.7715 : Architecture and requirements for routing in the automatically switched optical networks

Y.1706.1/G.7715.1 : ASON routing architecture and requirements for link state protocols

Y.1706.2/G.7715.2 : ASON routing architecture and requirements for remote route query

Y.1709/G.7718 : Framework for ASON management

Y.1709.1/G.7718.1 : Protocol-neutral management information model for the control plane view

Y.1720 : Protection switching for MPLS networks