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.


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) (%) 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