SIST ETS 300 417-1-1 E1:2003
(Main)Transmission and Multiplexing (TM); Generic functional requirements for Synchronous Digital Hierarchy (SDH) equipment; Part 1-1: Generic processes and performance
Transmission and Multiplexing (TM); Generic functional requirements for Synchronous Digital Hierarchy (SDH) equipment; Part 1-1: Generic processes and performance
Generic functional requirements for all types of SDH equipment based on a functional decomposition approach with rules for combining functions to form equipment. Specific layers are described in part 2 to 8.
Prenos in multipleksiranje (TM) – Generične funkcijske zahteve za opremo v sinhroni digitalni hierarhiji (SDH) – 1-1. del: Osnovni procesi in lastnosti
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Transmission and Multiplexing (TM); Generic functional requirements for Synchronous Digital Hierarchy (SDH) equipment; Part 1-1: Generic processes and performance33.040.20Prenosni sistemTransmission systemsICS:Ta slovenski standard je istoveten z:ETS 300 417-1-1 Edition 1SIST ETS 300 417-1-1 E1:2003en01-december-2003SIST ETS 300 417-1-1 E1:2003SLOVENSKI
STANDARD
EUROPEANETS 300 417-1-1TELECOMMUNICATIONJanuary 1996STANDARDSource: ETSI TC-TMReference: DE/TM-01015-1-1ICS:33.020Key words:SDH, transmission, equipment, performanceTransmission and Multiplexing (TM);Generic functional requirements forSynchronous Digital Hierarchy (SDH) equipment;Part 1-1: Generic processes and performanceETSIEuropean Telecommunications Standards InstituteETSI SecretariatPostal address: F-06921 Sophia Antipolis CEDEX - FRANCEOffice address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCEX.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.frTel.: +33 92 94 42 00 - Fax: +33 93 65 47 16Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and theforegoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1996. All rights reserved.SIST ETS 300 417-1-1 E1:2003New presentation - see History box
Page 2ETS 300 417-1-1: January 1996Whilst every care has been taken in the preparation and publication of this document, errors in content,typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to"ETSI Editing and Committee Support Dept." at the address shown on the title page.SIST ETS 300 417-1-1 E1:2003
Page 3ETS 300 417-1-1: January 1996ContentsForeword.71Scope.92Normative references.103Definitions and abbreviations.113.1Abbreviations.113.2Definitions.163.3Naming and numbering conventions.193.3.1Bit numbering scheme.193.3.2STM-N SOH byte numbering scheme.193.3.3Atomic function naming scheme.203.3.4Information naming scheme.203.3.5AU/TU numbering scheme.213.3.6Reference points numbering scheme.233.3.7Tributary port numbering scheme.233.3.8PU numbering scheme.243.3.9Supervision variables numbering scheme.253.4Symbols and diagrammatic conventions.264Introduction.284.1Functional modelling rationale.284.1.1Description of network elements - equipment functional specification.284.1.2Implementation independence.284.1.3Universal representation for management.294.2The underlying principles of functional modelling.294.2.1The client-server relationship.294.2.2Atomic functions and compound functions.294.2.3Network functions included in specific equipment.294.2.4The functional model and the information model.305Network layering principles.315.1Transmission layers.315.2Atomic functions.325.2.1Connection function.335.2.2Trail termination function.335.2.3Adaptation function.355.3Reference points.365.4Transmission sub-layers.366Combination rules.376.1General.376.1.1Binding at connection points.376.1.2Binding at (termination) connection points.376.1.3Binding at APs.386.1.4Alternative binding representations.386.2Directionality.386.3Compound functions.386.4Major compound functions.396.5Trail, (sub)network connections, link connections, matrix connections, and tandemconnections.396.6Matrix connections.406.6.11-port.416.6.22-port.416.6.33-port.426.6.44-port.42SIST ETS 300 417-1-1 E1:2003
Page 4ETS 300 417-1-1: January 19967Maintenance signals and processes.447.1Trail Trace Identifier (TTI).447.2Trail Signal Label (TSL).457.2.1Unequipped signal application.467.2.2Supervisory-unequipped signal application.477.2.3Adaptation function selection supervision process.477.2.4Connection monitoring application.487.3Error Detection Code (EDC).487.4Remote indicators.487.4.1Remote Defect Indicator (RDI).497.4.2Remote Error Indicator (REI).517.5Alarm Indication Signal (AIS).527.6Non-intrusive monitoring of characteristic information at connection points.547.7Signal fail and signal degrade.557.7.1Server Signal Fail (aSSF) signal.557.7.2Server Signal Fail failure (fSSF).557.7.3Server Signal Degrade (aSSD) signal.557.7.4Trail Signal Fail (aTSF) signal.557.7.5Trail Signal Degrade (aTSD) signal.568Supervision process.578.1Introduction.578.2Atomic function fault management.598.2.1Defect filter f1.608.2.1.1Introduction.608.2.1.2Trail Signal Label (TSL) and unequipped.608.2.1.3Trail Trace Identifier (TTI).628.2.1.4Degraded (DEG).638.2.1.5Remote Defect Indicator (RDI).648.2.1.6Loss of signal.648.2.1.7Alarm Indication Signal (AIS).658.2.1.8Loss of frame, multiframe, pointer.668.2.1.9Failure of protocol.668.2.1.10Equipment defects.668.2.1.11Transmit Fail.668.2.2Consequent action filter f2.668.2.2.1Alarm Indication Signal (AIS).688.2.2.2Remote Defect Indicator (RDI).688.2.2.3Remote Error Indication (REI).698.2.2.4Server Signal Fail (SSF).698.2.2.5Trail Signal Fail (TSF).698.2.2.6Trail Signal Degrade (TSD).708.2.2.7Unequipped Virtual Container (VC) signal.708.2.2.8Unit Failure (UF).708.2.2.9(Automatic) laser shutdown (ALS/LS).708.2.2.10Server Signal Degrade (SSD).708.2.3Fault cause filter f3.718.2.3.1Termination sink function.718.2.3.2Termination supervisory sink function.718.2.3.3Adaptation sink function.728.2.3.4Connection function.728.2.4Performance monitoring filter f11 (pN_EBC).728.2.5Performance monitoring filter f12 (pN_DS).728.2.6Performance monitoring filter f21 (pF_EBC).738.2.7Performance monitoring filter f22 (pF_DS).738.2.8Other performance monitoring parameters (pOFS, pPSC, pPJE).738.3Equipment management function fault management process.738.3.1Failure filter f4.748.3.2Replaceable unit alarm filter f5.748.3.3Network element alarm filter f6.748.3.4Station alarm filter f7.748.3.5Failure report filter f8.748.4Equipment Management Function (EMF) performance monitoring process.74SIST ETS 300 417-1-1 E1:2003
Page 5ETS 300 417-1-1: January 19968.4.1PM filter f13 (N_ES).758.4.2PM filter f23 (F_ES).768.4.3PM filter f14 (N_SES).768.4.4PM filter f24 (F_SES).768.4.5PM filter f15 (N_UAT_cmd).768.4.6PM filter f25 (F_UAT_cmd).768.4.7PM filter f16 (N_BBE).768.4.8PM filter f26 (F_BBE).768.4.9PM filter f31 (history management).768.5Trail termination point mode and port mode.779Protection process.799.1Introduction.799.2General.799.2.1Protection architectures.809.2.2Switching types.819.2.2.1APS channel provisioning.829.2.2.2APS channel usage.829.2.2.3APS channel coding.829.2.3Operation types.829.2.4Protection switch requests.829.2.5Protection switch performance.839.2.6Protection switch state machine.839.2.7Protection connection function (I/O and processes).839.3Trail protection class.849.3.1Linear trail protection.849.3.2SPRING protection.859.3.3DPRING protection.879.4SNC protection class.879.4.1Inherently monitored SNC (SNC/I) protection.879.4.2Non-intrusively monitored SNC (SNC/N) protection.889.4.3Tandem connection protection.899.5Equipment protection.8910Timing processes.9010.1Introduction.9010.2Synchronization timing collection.9010.2.1External synchronization reference inputs.9110.2.2Internal synchronization reference input.9110.3Synchronization timing selection and processing.9110.3.1Synchronization reference source selection.9110.3.2Clock processing.9110.4Synchronization timing distribution.9210.4.1Internal synchronization distribution interfaces.9210.4.2Synchronization reference outputs.9210.5Inter atomic function timing.9210.6AIS timing.9311General performance.9411.1Availability objectives.9411.1.1General.9411.1.2Parameters.9411.1.3Derivation of MTBF values.9511.2Transfer delay.9511.3Jitter and wander.9511.3.1Jitter and wander generation.9611.3.1.1Jitter and wander generation on STM-N signals.9611.3.1.2Jitter and wander generation on PDH interfaces.9611.3.1.3Jitter and wander generation on 2 048 kHz or 2 048 kbit/ssynchronization interfaces.9811.3.2Jitter and wander tolerance.9811.3.2.1Jitter and wander tolerance on optical interfaces.98SIST ETS 300 417-1-1 E1:2003
Page 6ETS 300 417-1-1: January 199611.3.2.2Jitter and wander tolerance on traffic carrying electricalinterfaces.9811.3.2.3Jitter and wander tolerance on 2 048 kHz and 2 048 kbit/ssynchronization interfaces.9811.3.3Jitter and wander transfer functions.9911.3.4Performance on synchronization reference change-over.9911.4Error performance.9911.5Blocking factor.9911.6Connection set-up time.99Annex A (normative):Pointer generation.100Annex B (normative):Pointer interpretation.102Annex C (informative):Network "production rules".106Annex D (informative):Flexible assignment of tributary port to VC-12 capacity.108Annex E (informative):Relationship between TU-2/12 address, and location of columns within aVC-4.109Annex F (informative):Performance monitoring history process.111Annex G (informative):Protection switch examples.113Annex H (informative):Bibliography.114History.115SIST ETS 300 417-1-1 E1:2003
Page 7ETS 300 417-1-1: January 1996ForewordThis European Telecommunication Standard (ETS) has been produced by the Transmission andMultiplexing (TM) Technical Committee of the European Telecommunications Standards Institute (ETSI).This ETS has been produced in order to provide inter-vendor and inter-operator compatibility ofSynchronous Digital Hierarchy (SDH) equipment.This ETS consists of 8 parts as follows:Part 1:"Generic processes and performance" (DE/TM-01015-1-1).Part 2:"Physical section layer functions" (DE/TM-01015-2-1).Part 3:"STM-N regenerator and multiplex section layer functions" (DE/TM-01015-3-1).Part 4:"SDH path layer functions" (DE/TM-01015-4-1).Part 5:"PDH path layer functions" (DE/TM-01015-5-1).Part 6:"Synchronization distribution layer functions" (DE/TM-01015-6-1).Part 7:"Auxiliary layer functions" (DE/TM-01015-7-1).Part 8:"Major compound functions" (DE/TM-01015-8-1).Parts 2 to 7 specify the layers and their atomic functions. Part 8 specifies combinations of atomicfunctions, the compound and major compound functions.NOTE 1:This ETS does not currently address configuration management.NOTE 2:The SDH radio equipment functional blocks are addressed by ETSI STC TM4.Transposition datesDate of adoption of this ETS:31 January 1996Date of latest announcement of this ETS (doa):30 April 1996Date of latest publication of new National Standardor endorsement of this ETS (dop/e):31 October 1996Date of withdrawal of any conflicting National Standard (dow):31 October 1996SIST ETS 300 417-1-1 E1:2003
Page 8ETS 300 417-1-1: January 1996Blank pageSIST ETS 300 417-1-1 E1:2003
Page 9ETS 300 417-1-1: January 19961ScopeThis European Telecommunication Standard (ETS) specifies a library of basic building blocks and a set ofrules by which they may be combined in order to describe a digital transmission equipment. The librarycomprises the functional building blocks needed to specify completely the generic functional structure ofthe European digital transmission hierarchy. In order to be compliant with this ETS, equipment needs tobe describable as an interconnection of a subset of these functional blocks contained within this ETS. Theinterconnections of these blocks should obey the combination rules given.This ETS specifies both the components and the methodology that should be used in order to specifySDH equipment; it does not specify an individual SDH equipment as such.The specification method is based on functional decomposition of the equipment into atomic, compoundand major compound functions. The equipment is then described by its Equipment FunctionalSpecification (EFS) which lists the constituent atomic and compound functions, their interconnection, andany overall performance objectives (e.g. transfer delay, availability, etc.). The concept is illustrated infigure 1.The internal structure of the implementation of this functionality (equipment design) need not be identicalto the structure of the functional model, as long as all the details of the externally observable behaviourcomply with the EFS.The equipment functionality is consistent with the SDH multiplexing structure given in ETS 300 147 [1].Equipment developed prior to the production of this ETS may not comply in all details with this ETS.Equipment which is normally stated to be compliant with this ETS may not fulfil all the requirements in thecase that it is interworking with old equipment that is not compliant with this ETS.The structure of the ETS envisages the addition of new layers, atomic functions and (major) compoundfunctions. For example, Asynchronous Transfer Mode (ATM), Integrated Services Digital Network (ISDN)and n x 64 kbit/s layers could be added as new complete parts while corresponding adaptation functionsare added to existing layers. "SDH interworking" functionality can be added as new layers in part 5. Thisapproach allows for short development times for standards describing new functionality.Atomicfunction XPerformanceobjectives listPerformanceobjectives listPerformanceobjectives listPerformanceobjectives listAtomicfunction YAtomicfunction ZEquipmentfunctionalspecificationOverall performanceobjectives listCompoundfunction 1Inter-connectFigure 1: Composition of equipment functional specificationSIST ETS 300 417-1-1 E1:2003
Page 10ETS 300 417-1-1: January 19962Normative referencesThis ETS incorporates by dated and undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listedhereafter. For dated references, subsequent amendments to or revisions of any of these publicationsapply to this ETS only when incorporated in it by amendment or revision. For undated references the latestedition of the publication referred to applies.[1]ETS 300 147 (1995): "Transmission and Multiplexing (TM); Synchronous DigitalHierarchy (SDH); Multiplexing structure".[2]ETS 300 232: "Transmission and Multiplexing (TM); Optical interfaces forequipments and systems relating to the Synchronous Digital Hierarchy [ITU-TRecommendation G.957 (1993) modified]".[3]prETS 300 304: "Transmission and Multiplexing (TM); Synchronous DigitalHierarchy (SDH) information model for the Network Element (NE) view".[4]ETS 300 019: "Equipment Engineering (EE); Environmental conditions andenvironmental tests for telecommunications equipment".[5]prETS 300 462-2: "Transmission and Multiplexing (TM); Generic requirementsfor synchronization networks; Part 2: Synchronization network architecture".[6]ITU-T Recommendation G.803 (1993): "Architecture of transport networksbased on the synchronous digital hierarchy (SDH)".[7]ITU-T Recommendation G.703 (1991): "Physical/electrical characteristics ofhierarchical digital interfaces".[8]ITU-T Recommendation G.704 (1995): "Synchronous frame structures used at1 544, 6 312, 2 048, 8 488 and 44 736 kbit/s hierarchical levels".[9]ITU-T Recommendation G.742 (1988): "Second order digital multiplexequipment operating at 8 448 kbit/s and using positive justification".[10]ITU-T Recommendation G.751 (1988): "Digital multiplex equipments operatingat the third order bit rate of 34 368 kbit/s and the fourth order bit rate of139 264 kbit/s and using positive justification".[11]ITU-T Recommendation G.957 (1995): "Optical interfaces for equipments andsystems relating to the synchronous digital hierarchy".[12]ITU-T Recommendation G.783 (1994): "Characteristics of synchronous digitalhierarchy (SDH) equipment functional blocks".[13]ITU-T Recommendation G.811 (1988): "Timing requirements at the outputs ofprimary reference clocks suitable for plesiochronous operation of internationaldigital links".[14]ITU-T Recommendation G.821 (1988): "Error performance of an internationaldigital connection forming part of an integrated services digital network".[15]ITU-T Recommendation G.823 (1988) modified according COM XVIII - R.report: "The control of jitter and wander within digital networks which are basedon the 2 048 kbit/s hierarchy".[16]ITU-T Recommendation G.825 (1993): "The control of jitter and wander withindigital networks which are based on the synchronous digital hierarchy (SDH)".SIST ETS 300 417-1-1 E1:2003
Page 11ETS 300 417-1-1: January 1996[17]ITU-T Recommendation G.826 (1993): "Error performance parameters andobjectives for international, constant bit rate digital paths at or above the primaryrate".[18]ITU-T Recommendation G.958 (1994): "Digital line systems based on thesynchronous digital hierarchy for use on optical cables".[19]ITU-T Recommendation G.911 (1993): "Parameters and calculationmethodologies for reliability and availability of fibre optic systems".[20]ITU-T Recommendation E.862 (1992): "Dependability planning oftelecommunication networks".[21]ITU-T Recommendation X.721 (1992): "Information technology - Open SystemsInterconnection - Structure of Management Information: Guidelines for thedefinition of managed objects".[22]ITU-T Recommendation G.708 (1993): "Network node interface for thesynchronous digital hierarchy".[23]ITU-T Recommendation M.20 (1992): "Maintenance philosophy fortelecommunications networks".[24]ITU-T Recommendation M.2120 (1992): "Digital path, section and transmissionsystem fault detection and localization procedures".[25]ITU-T Recommendation G.784 (1994): "Synchronous digital hierarchy (SDH)management".[26]prETS 300 462-5: "Transmission and Multiplexing (TM); Generic requirementsfor synchronization networks; Part 5: Timing characteristics of slave clockssuitable for operation in Synchronous Digital Hierarchy (SDH) equipment".3Definitions and abbreviations3.1AbbreviationsFor the purposes of this ETS the following abbreviations apply:AAdaptation functionAcSLAccepted Signal LabelAcTIAccepted Trace identifierADMAdd-Drop MultiplexerAIAdapted InformationAISAlarm Indication SignalALSAutomatic Laser ShutdownAPAccess PointAPIdAccess Point IdentifierAPSAutomatic Protection SwitchATMAsynchronous Transfer ModeAUAdministrative UnitAU-nAdministrative Unit, level nAUGAdministrative Unit GroupBBEBackground Block ErrorBBERBackground Block Error RatioBERBit Error RatioBFABasic Frame AlignmentBIPBit Interleaved ParityBIP-NBit Interleaved Parity, width NBITSBuilding Integrated Timing SupplyBNFBackus-Naur FormBSHRBi-directional Self Healing RingSIST ETS 300 417-1-1 E1:2003
Page 12ETS 300 417-1-1: January 1996CConnection functionCssupervisory-unequipped Connection functionCHChannelCICharacteristic InformationCKClockCMConnection MatrixCMICoded Mark InversionCtrlControlCoConnectionCPConnection PointCRC Cyclic Redundancy CheckCRC-NCyclic Redundancy Check, width NCSESConsecutive Severely Errored SecondsCTFCompound Timing FunctionDDataDCCData Communications ChannelDECDecrementDEGDegradedDEGTHRDegraded ThresholdDLData LinkDPRINGDedicated Protection RingDROPDecreased Received Optical PowerDXCDigital Cross ConnectE0Electrical interface signal 64 kbit/sE11Electrical interface signal 1 544 kbit/sE12Electrical interface signal 2 048 kbit/sE22Electrical interface signal 8 448 kbit/sE31Electrical interface signal 34 368 kbit/sE32Electrical interface signal 44 736 kbit/sE4Electrical interface signal 139 264 kbit/sEBCErrored Block CountECCEmbedded Communications ChannelECC(x)Embedded Communications Channel, Layer xEDCError Detection CodeEDCVError Detection Code ViolationEFSEquipment Functional SpecificationEMFEquipment Management FunctionEPSEquipment Protection SwitchEQEquipmentERSElementary Regenerator SectionESErrored SecondESElectrical SectionESRErrored seconds RatioExCCITT Recommendation G.703 type electrical signal, bit rate order xExSLExpected Signal LabelExTIExpected Trace IdentifierF_BFar-end BlockF_BBEFar-end Background Block ErrorF_DSFar-end Defect SecondF_EBCFar-end Errored Block CountF_ESFar-end Errored SecondF_SESFar-end Severely Errored SecondF_SESTHRFar-end Severely Errored Second ThresholdF_UAT_cmdFar-end UnAvailable Time commandFASFrame Alignment SignalFEBEFar End Block ErrorFERFFar End Receive FailureFIFOFirst In First OutFITFailure In TimeFOFrame Offset informationFOPFailure Of ProtocolFSFrame Start signalHDB3High Density Bipolar of order 3SIST ETS 300 417-1-1 E1:2003
Page 13ETS 300 417-1-1: January 1996HDLCHigh-level Data Link Control procedureHOHigher OrderHOVCHigher Order Virtual ContainerHPHigher order PathIDIdentifierIFIn Frame stateINCIncrementIOSIntra-Office SectionISIntermediate SystemISDNIntegrated Services Digital NetworkISOInternational Standardization OrganizationLANLocal Area NetworkLBCLaser Bias CurrentLCLink ConnectionLLCLogical Link ControlLMCLaser Modulation CurrentLOLower OrderLOALoss Of Alignment; generic for LOF, LOM, LOPLOFLoss Of FrameLOMLoss Of MultiframeLOPLoss Of PointerLOSLoss Of SignalLOVCLower Order Virtual ContainerLPxLower order Path for VC-x (x = 11, 12, 2, 3)LTLine TerminationM&CFManagement & Communication FunctionMCMatrix ConnectionMCFMessage Communications FunctionMDTMean Down Timemeimaintenance event informationMIManagement InformationMOManaged ObjectMONMonitoredMPManagement PointMSMultiplex SectionMS1STM-1 Multiplex SectionMS4STM-4 Multiplex SectionMS16STM-16 Multiplex SectionMSBMost Significant BitMSOHMultiplex Section OverheadMSPMultiplex Section ProtectionMSPGMultiplex Section Protection GroupMTBFMean Time Between FailuresMTTRMean Time To RepairN_BNear-end BlockN_BBENear-end Background Block ErrorN_DSNear-end Defect SecondN_EBCNear-end Errored Block CountN_ESNear-end Errored SecondN_SESNear-end Severely Errored SecondN_SESTHRNear-end Severely Errored Second ThresholdN_UAT_cmdNear-end UnAvailable Time commandNCNetwork ConnectionN.C.Not ConnectedNCMNo CRC-4 Multiframe alignment signalNDFNew Data FlagNENetwork ElementNNINetwork Node InterfaceNMONNot MonitoredNPDUNetwork Protocol Data UnitNRZNon-Return to ZeroNRZINon-Return to Zero InvertedNSAPNetwork Service Access PointSIST ETS 300 417-1-1 E1:2003
Page 14ETS 300 417-1-1: January 1996NUNational Use (bits, bytes)NUxNational Use, bit rate order xOAMOperation, Administration and ManagementOFSOut of Frame SecondOOFOut Of Frame stateOSOptical SectionOSOperations SystemOSCOscillatorOSI(x)Open Systems Interconnection, Layer xOWOrder WirePProtectionP_AProtection AdaptationP_CProtection ConnectionP_TTProtection Trail TerminationP0x64 kbit/s layer (transparent)P0_31c1 984 kbit/s layerP11x1 544 kbit/s layer (transparent)P12s2 048 kbit/s PDH path layer with synchronous 125 ms frame structure accordingto ETS 300 167P12x2 048 kbit/s layer (transparent)P22e8 448 kbit/s PDH path layer with 4 plesiochronous 2 048 kbit/sP22x8 448 kbit/s layer (transparent)P31e34 368 kbit/s PDH path layer with 4 plesiochronous 8 448 kbit/sP31s34 368 kbit/s PDH path layer with synchronous 125 ms frame structureaccording to ETS 300 337P31x34 368 kbit/s layer (transparent)P32x44 736 kbit/s layer (transparent)P4e139 264 kbit/s PDH path layer with 4 plesiochronous 34 368 kbit/sP4s139 264 kbit/s PDH path layer with synchronous 125 ms frame structureaccording to ETS 300 337P4x139 264 kbit/s layer (transparent)PDCPhoto Diode CurrentPDHPlesiochronous Digital HierarchyPJEPointer Justification EventPLMPayload MismatchPMPerformance MonitoringPnPlesiochronous signal, Level nPOHPath OverheadPRCPrimary Reference ClockPSProtection SwitchingPSCProtection Switch CountPSVPower Supply VoltagePTRPointerPUPDH UnitQOSQuality Of ServiceRDIRemote Defect IndicatorREIRemote Error IndicatorRIRemote InformationRLTRegenerated Line TerminationRPRemote PointRSRegenerator SectionRS1STM-1 Regenerator SectionRS4STM-4 Regenerator SectionRS16STM-16 Regenerator SectionRSOHRegenerator Section OverheadRTGRegenerator Timing GeneratorRTRReset Threshold ReportRxSLReceived Signal LabelRxTIReceived Trace identifierS11VC-11 path layerS12VC-12 path layerS2VC-2 path layerS3VC-3 path layerSIST ETS 300 417-1-1 E1:2003
Page 15ETS 300 417-1-1: January 1996S4VC-4 path layerSASEStand-Alone Synchronization EquipmentSDSynchronization Distribution layer, Signal DegradeSD-22 048 kbit/s based timing source referenceSD-C2 048 kHz based timing source referenceSD-NSTM-N based timing source referenceSDASynchronization Distribution AdaptationSDHSynchronous Digital HierarchySDTSynchronization Distribution TerminationSECSDH Equipment ClockSESSeverely Errored SecondSESRSeverely Errored seconds RatioSFSignal FailSHRSelf Healing RingSkSinkSLMSignal Label MismatchSMFSub-Multi FrameSMUXSynchronous MultiplexerSNCSub-Network ConnectionSNC/IInherently monitored Sub-Network Connection protectionSNC/NNon-intrusively monitored Sub-Network Connection protectionSoSourceSOHSection OverheadSPRINGShared Protection RingSSDServer Signal DegradeSSFServer Signal FailSSMSynchronization Status MessageSSUSynchronization Supply UnitSTMSynchronous Transport ModuleSTM-NSynchronous Transport Module, level NT122 048 kHz signalTCAThreshold Crossing AlertTCFTiming Connection FunctionTCNThreshold Crossing NotificationTCPTermination Connection PointTDTransmit DegradeTFTransmit FailTFAStrail Trace identifier Frame Alignment SignalTGTiming GeneratorTIMTrace Identifier MismatchTITiming InformationTMTransmission_Medium, Transmission & MultiplexingTMNTelecommunications Management NetworkTPTiming PointTPmodeTermination Point modeTPSTransmission Protection SwitchTRThreshold ReportTSTime SlotTSDTrail Signal DegradeTSFTrail Signal FailTSLTrail Signal LabelTTTrail Termination functionTTsTrail Termination supervisory functionTTITrail Trace IdentifierTTPTrail Termination PointTUTributary UnitTU-mTributary Unit, level mTUGTributary Unit GroupTUG-mTributary Unit Group, level mTxSLTransmitted Signal LabelTxTITransmitted Trace IdentifierUASUnAvailable SecondUATUnAvailable TimeSIST ETS 300 417-1-1 E1:2003
Page 16ETS 300 417-1-1: January 1996UAT_cmdUnAvailable Time commandUNEQUnequippedUFUnit FailureUNIUser Network InterfaceURLTUnregenerated Line TerminationUSRUser channelsUVCUnequipped VCVCVirtual ContainerVC-nVirtual Container, level nVMRViolation Monitoring and RemovalVPVirtual PathWWorking3.2DefinitionsFor the purposes of this ETS, the following definitions apply:process: A generic term for an action or a collection of actions.function: A "process" defined for digital transmission hierarchies (e.g. Plesiochronous Digital Hierarchy(PDH), SDH) which acts on a collection of input information to produce a collection of output information.A function is distinguished by the way in which characteristics of the collection, or of members of thecollection of output information differ from characteristics of members of the collection of inputinformation.atomic function: A "function" which if divided into simpler "functions" would cease to be uniquely definedfor digital transmission hierarchies. It is therefore indivisible from a network point of view. The followingatomic functions are defined in each network layer:-bi-directional Trail Termination function (._TT), Trail Termination Source function (._TT_So), TrailTermination Sink function (._TT_Sk) and Connection function (._Co);-between client and server layer networks three adaptation functions are defined: Adaptation Sinkfunction ._A_Sk, Adaptation Source function ._A_So, and the bi-directional Adaptation function._A.adaptation function: An "atomic function" which passes a collection of information between layernetworks by changing the way in which the collection of information is represented.trail termination function: An "atomic function" within a "layer" which generates, adds, and monitorsinformation concerning the integrity and supervision of "adapted information".connection function: An "atomic function" within a layer which, if connectivity exists, relays a collection ofitems of information between groups of atomic functions. It does not modify the members of this collectionof items of information although it may terminate any switching protocol information and act upon it. Anyconnectivity restrictions between inputs and outputs shall be stated.compound function: A "function" which represents a collection of "atomic functions" within one layer.EXAMPLE 1:A combination of several atomic adaptation functions within a certain layer (eachserving one client layer) is a compound adaptation function. A combination of a(compound) adaptation function and the layer's termination function is acompound function.major compound function: A “function" which represents a collection of "atomic functions" and/or"compound functions" within more than one "layer".EXAMPLE 2:The atomic functions in the Optical Section (OS), Multiplex Section (MS) andRegenerator Section (RS) layers may be combined to form a major compoundfunction.SIST ETS 300 417-1-1 E1:2003
Page 17ETS 300 417-1-1: January 1996The (major) compound functions facilitate simplified descriptions of equipment. Standardized (major)compound functions attach a unique name to a common combination of atomic functions.equipment functional specification: A collection of atomic, compound, or major compound functionsand any overall performance objectives which describe the functionality of an equipment.layer: A concept used to allow the transport network functionality to be described hierarchically assuccessive levels; each layer being solely concerned with the generation and transfer of its "characteristicinformation".client/server layer: Any two adjacent network layers are associated in a client/server relationship. Eachtransport network layer provides transport to the layer above and uses transport from the layers below.The layer providing transport is termed a "server", the layer using transport is termed "client".grooming: The allocation of server layer trails to client layer connections which groups together clientlayer connections whose characteristics are similar or related.Thus it is possible to groom Virtual Container, level 12 (VC-12) paths by service type, by destination, or byprotection category in to particular VC-4 paths which can then be managed accordingly. It is also possibleto groom VC-4 paths according to similar criteria into Synchronous Transport Module (STM-N) sections.consolidation: The allocation of server layer trails to client layer connections which ensures that eachserver layer trail is full before the next is allocated. Consolidation minimises the number of partially filledserver layer trails. It therefore maximises the "fill factor".Thus a number of partially filled VC-4 paths may be consolidated into a single, fully filled VC-4.Remote Defect Indicator (RDI): A signal which conveys the defect status of the characteristic informationreceived by the Trail Termination sink function back to the network element which contains thecharacteristic information originating trail termination source function.Examples of RDI signals are the Far End Receive Failure (FERF) bit(s) in SDH signals, the A-bit in CCITTRecommendation
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