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ITU G.992.1:1999

ITU G.992.1:1999 Asymmetrical Digital Subscriber Line (adsl) Transceivers Defines requirements for Asymmetric Digital Subscriber Line (ADSL) Transceivers on a metallic twisted pair that permits high-speed data transmission between the network operator end (ATU-C) and the cu

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Table of Contents

1Scope
1.1Systemreferencemodel
1.2Objectives
2References
3Definitions
4Abbreviations
5ReferenceModels
5.1ATU-Ctransmitterreferencemodels
5.2ATU-Rtransmitterreferencemodels
5.3ATU-C/Rtransmittertimingmodel
(AnnexConly)
6Transportcapacity
6.1TransportofSTMdata
6.2TransportofATMdata
6.3ADSLsystemoverheadsandtotalbitrates
7ATU-Cfunctionalcharacteristics
7.1STMTransmissionProtocolSpecific
functionalities
7.2ATMTransportProtocolSpecific
functionalities
7.3Networktimingreference(NTR)
7.4Framing
7.5Scramblers
7.6Forwarderrorcorrection
7.7Toneordering
7.8Constellationencoder(trelliscodeversion)
7.9Constellationencoder-Notrelliscoding
7.10Gainscaling
7.11Modulation
7.12Cyclicprefix
7.13Transmitterdynamicrange
7.14ATU-CDownstreamTransmitterspectralmasks
7.15DualBitmappingandRateConversion
(AnnexConly)
7.16FEXTBitmapping(AnnexConly)
8ATU-RFunctionalCharacteristics
8.1STMTransmissionProtocolSpecificfunctionalities
8.2ATMTransportProtocolSpecificfunctionalities
8.3Networktimingreference
8.4Framing
8.5Scramblers
8.6Forwarderrorcorrection
8.7Toneordering
8.8Constellationencoder-Trellisversion
8.9Constellationencoder-Uncodedversion
8.10Gainscaling
8.11Modulation
8.12Cyclicprefix
8.13Transmitterdynamicrange
8.14ATU-RUpstreamTransmitterspectralresponse
8.15DualBitmappingandRateConversion(AnnexConly)
8.16FEXTBitmapping(AnnexConly)
9EOCOperationsandMaintenance
9.1ClearEOC
9.2Embeddedoperationschannel(EOC)requirements
9.3In-serviceperformancemonitoringandsurveillance
9.4FailuresandPerformanceParameters
9.5TestParameters
10Initialization
10.1Overview
10.2Handshake-ATU-C
10.3Handshake-ATU-R
10.4Transceivertraining-ATU-C
10.5Transceivertraining-ATU-R
10.6Channelanalysis(ATU-C)
10.7Channelanalysis(ATU-R)
10.8Exchange-ATU-C
10.9Exchange-ATU-R
11AOCon-lineadaptationandreconfiguration
11.1TheADSLoverheadcontrol(AOC)channel
11.2On-lineadaptation-Bitswapping
AnnexA-SpecificrequirementsforanADSLsystem
operatinginthefrequencybandabovePOTS
A.1ATU-CFunctionalCharacteristics(pertainsto
clause7)
A.2ATU-R(seeClause8)
A.3Initialization(seeClause10)
A.4Electricalcharacteristics(new)
AnnexB-SpecificrequirementsforanADSLsystem
operatinginthefrequencybandaboveISDNas
definedinITU-TRecommendationG.961Appendices
IandII
B.1ATUFunctionalcharacteristics(seeClause7)
B.2ATU-Rfunctionalcharacteristics(seeClause8)
B.3Initialization(seeClause10)
AnnexC-SpecificrequirementsforanADSLsystem
operatinginthesamecableasISDNasdefinedin
ITU-TRecommendationG961AppendixIII
C.1Scope
C.2Definitions
C.3ReferenceModels
C.4ATU-CFunctionalcharacteristics(pertainsto7.1)
C.5ATU-RFunctionalcharacteristics(pertainsto
clause8)
C.6EOCOperationandMaintenance(pertainstoclause9)
C.7Initialization
C.8AOCon-lineadaptationandreconfiguration
(pertainstoclause11)
AnnexD-ATU-CandATU-Rstatediagrams
D.1Introduction
D.2Definitions
D.3StateDiagrams
AnnexE-POTSandISDN-BAsplitters
E.1Type1-European
E.2Type2-NorthAmerica
E.3Type3-ADSLaboveISDN(ITU-TG.961AppendixI
orII
E.4Type4-TypeforJapan
AnnexF-ATU-xClassificationandPerformancefor
RegionA(NorthAmerica)
F.1Classificationdefinitions
F.2Performancerequirements
AnnexG-ATU-xClassificationandPerformancefor
RegionB(Europe)
G.1Performancerequirements
AppendixI-ATMLayertoPhysicalLayerLogicalInterface
AppendixII-Dynamic(on-line)RateAdaptation
II.1Introduction
II.2DRAprotocolandmessages
II.3Monitoring
II.4Configuration
II.5Exchange
II.6Swap
II.7DRAstatediagram
AppendixIII-Compatibilitywithothercustomerpremises
equipment
AppendixIV-Bibliography

Abstract

Defines requirements for Asymmetric Digital Subscriber Line (ADSL) Transceivers on a metallic twisted pair that permits high-speed data transmission between the network operator end (ATU-C) and the customer end (ATU-R). It provides a range of bearer channels in conjunction with one of three other services depending on the environment: * ADSL transmission simultaneously on the same pair with voice (band) service; * ADSL transmission simultaneously on the same pair with G.961 (Appendix I or II) ISDN services; or * ADSL transmission on the same pair with voiceband transmission and with TCM-ISDN (G.961 Appendix III) in an adjacent pair.

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