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Evolution of Cabling StandardsTIA/EIAISO/IECCENELECbyPaul KishNORDX/CDTChair TIA TR 41.8

OutlineMarket trendsl Standards developmentl– where we were– where we are– where we are goinglBeyond Category 5– main challenges & issues

Market trendslIncreased demand for bandwidth– emerging Gigabit networkslStandards evolution– Category 5 / 5e / 6 .lTotal system solutions– performance– warranty– value-added5Category 5e3Category 64

Industry standardslCommercial BuildingTelecommunications Cabling Standards– International– Europe– United States– CanadaISO/IEC IS 11801Cenelec EN 50173TIA/EIA 568ACSA T529

Standards are Good but:l Theydefine the “WORST”acceptable performance to bemet by components, links aswell as channelsl It is the the “MINIMUM”acceptable performance. Notthe best or ideal.

TELECOMMUNICATIONSTIAINDUSTRY ASSOCIATION

TIA StandardsTR 41.8 Telecommunications CablingTR 41.8.1 (commercial)TIA 568-A, A1, A2 TSB-67, TSB-72, TSB-75TR 41.8.2 (residential)TIA 570-A / grades of serviceTR 41.8.3 (pathways & spaces)TIA 569-ATR 41.8.4 (COSP)customer owned outside plant

Cabling standards evolutionTransmissionBandwidthReturn LossFEXT / ELFEXTTIA/EIA 568-B(under development)InstallationBundled CablesCategory 5eDelay SkewAttenuationNEXTAddenda & TSBsTIA/EIA 568-AComponentsSome systemSystem

Addendum to TIA/EIA 568-AlAddendum 1 published – Propagation Delay and Delay SkewlAddendum 2 to be published – added req’ts. for NEXT of Connecting HardwarelAddendum 3 second ballot – Clarify hybrid cable and bundled cable req’ts.lAddendum 4 & 5 second ballot – added req’ts for Category 5 and enhancedCategory 5 cabling for ELFEXT and Return LossRecent Change: Addendum 4 to be reballoted as a TSB

Propagation Delay/Skew568-A Addendum #1Pr 1Signal inTRANSMITPr 2Pr 3Pr 4RECE Signal outIVELimits For 100BASE-T4 50 nanoseconds

NEXT of Connecting Hardware568-A Addendum #2BalunNetworkAnalyzerMatedConnectioncm term.

NEXT between cables568-A Addendum #3lThe worst pair power sum NEXT lossbetween cables shall be 3 dB better than thespecified worst pair-to-pair NEXT within anycable– 2nd ballot in progress– under review by IEEE 802.3XXXXXXXBundled & Hybrid Cables

Return LossReflected signalSignal15 m2mReturn Loss is a measure ofthe reflected signal energy in dB

Channel with 3 connectorsReturn Loss @ 100 MHzConnectorRL (dB)14151617181920ChannelRL (dB)7.28.29.210.211.212.213.2ReflectedEnergy (%)19.115.112.09.57.66.04.8Cat 5Cat 5e

Category 5 and Category 5eELFEXT and Return LossCategory 5 components (installed base)* reasonable worst case assumptionsmost 2-connector topologiescertain 3-connector topologiesCategory 5e components** worst case channel per TSB-67all 2, 3 & 4-connector topologies

Category 5 & 5e performanceTestParameterCategory 5Category 5ePS NEXTnot specified 27.1 -17log(f/100) dBELFEXT 17 - 20log(f/100) dB 17.4 - 20log(f/100) dBPSELFEXT 14.4 - 20log(f/100) dB 14.4 - 20log(f/100) dBReturn Loss1 f 2015 dB17 dB20 f 10015 -10log(f/20)17 -10log(f/20)

ISO/IEC SC25 WG3lCategory 5 ammendment– ELFEXT & Return LosslISO/IEC 11801 2nd edition– Category 6 development» PSACR 0 at 200 MHz» parameters specified to 250 MHz» connector / cable contribution (under study)– coupling attenuation / EMI (round robin)– Category 7 connector selection Jan/99– Fiber type / distance application matrix

ISO/IEC and CENELECProcess for Category 6 & 7 development4-connector cabling model assumedl TP/CP electrically visible componentsl connector spec. for 2-connector and4-connector topologyl higher-performance connector spec.adopted if multi-vendor interoperabilitydemonstrated within developmentcyclel only one connector spec. is intendedl

CENELECEN50173 Addendumllllllballot delayed pending ISO 11801 AddendumTIA Cat 5e Return Loss adopted for PL & ChPL delay skew reduced from 45ns to 43nsPS-NEXT & PS-ELFEXT may be calculatedCLC ISO/IEC TIA on above amendmentsISO/IEC ELFEXT & PS-ELFEXT valuesadopted

CENELECEN50173 2nd edition proposalsdelete Cat 3, Cat 4, 150 ohm cablingl specify cable Coupling Attenuationl 200 MHz Class E / Cat 6 UTP cablingl 600 MHz Class F / Cat 7 STP cablingl introduce Open Office (Zone) Wiringl add Centralised Optical Architecturel achieve max harmony with ISO 11801l

Concept of BandwidthNoisedBLossSignal0 dBBandwidthMHz

Evolution of LANsATM ForumCat 3and higherBandwidth26 Mb/s52 Mb/sIEEE 80210 Mb/s (10BASE-T)16 Mb/s (Token Ring)100 Mb/s (VGAnyLAN)100 Mb/s (100BASE-T4) 30 MHzCat 5155 Mb/s100 Mb/s (100BASE-Tx)622 Mb/s1000 Mb/sCat 5e1.2 Gb/s100 MHzEnhancedCabling? 4-10 Gbps ?Cat 6 / 7200 / 600 MHz

Gigabit Networks5e5marginAdditional margin isprovided foruncontrolled variationsdue to installationand the environmentNoise Threshold

Next generation cablingl ISO/IEC SC25 WG3 announced in Sept / 97that it will undertake simultaneous developmentof two new balanced cabling classes andcategories to be known as Class E (Category6) and Class F (Category 7)l TIA TR 41.8.1 first draft specificationØavailable bandwidth of at least 200 MHzsame 8-pin modular connector interfacebackwards compatible with Category 5Øtwo cable options under studyØØ

Category 6 optionsFrequencyMHzA)B)AttenuationChan. (dB)100PSNEXTCable (dB)PSNEXTConn. . (dB)PSNEXTCable (dB)PSNEXTConn. (dB)10020028.548.342.343.836.2Option A) and B) satisfy the criteria PSACR 0 at 200 MHzOption B) gives 3 dB lower channel attenuation at 200 MHz

Channel A dB0 dBLower Attenuation higher noise immunityNEXT & FEXT cancellers have no effect on alien crosstalk

Next generation cablingChallenges & IssueslModular 8-pin connectors– interoperabilitylComponent interaction– cables, cords, connectors & terminations– cabling imperfections become more visibleat higher frequencies– insertion loss deviationlReceiver sensitivity

l ISO/IEC ELFEXT & PS-ELFEXT values adopted. CENELEC EN50173 2nd edition proposals l delete Cat 3, Cat 4, 150 ohm cabling l specify cable Coupling Attenuation l 200 MHz Class E / Cat 6 UTP cabling l 600 MHz Class F