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1、TelecommunicationsIndustryAssociationTR41.1.1-05-05-019DocumentCoverSheetProjectNumberSP-3-0191:StandardforaPacket-basedVoIPTerminalAdapterAnalogTelephonePortDocumentTitleLoopLengthandTransmissionRequirementsfortheAnalogTelephonePortofaVoIPTerminalAda
2、pterSourceInfineonTechnologiesContactMichaelPirkerInfineonTechnologies1730NorthFirstStreetSanJose,CA95112U.S.A.Phone:(408)501-6713Fax:(408)501-2486Email:michael.pirker@infineon.comDistributionTR-41.1.1IntendedPurposeofDocument(Selectone)xForIncorporat
3、ionIntoTIAPublicationForInformationOther(describe)-ThedocumenttowhichthiscoverstatementisattachedissubmittedtoaFormulatingGrouporsub-elementthereofoftheTelecommunicationsIndustryAssociation(TIA)inaccordancewiththeprovisionsofSections6.4.1–6.4.6inclusi
4、veoftheTIAEngineeringManualdatedMarch2005,allofwhichprovisionsareherebyincorporatedbyreference.AbstractInlookingatthetransmissionrequirementsstatedinvariousNorth-Americanandinternationalspecifications,wefindthatthereisageneraltendencytoreducethestring
5、encyoftheserequirementsforshorterloops.SinceTIA-1063willhavetheshortestloopsofall(inactuality,0feet),webelieveitwouldbebeneficialtotheindustrytorelaxtheserequirementstothedegreepossible.Ingeneral,webelievethatitwouldbesufficientiftheyweretomeetthetran
6、smissionrequirementsofGR-909,whichassumesalooplengthof500feet.Inparticular,wepointoutthatthecurrentreferenceistoTIA-912-A;andthatthespecificationsstatedthereinare,withrespecttoC-messageweightednoise,morestringentthanforanyotherspecification,includingt
7、hoseforlongloopsintheU.S.v1.0–20050426TelecommunicationsIndustryAssociationTR41.1.1-05-05-0191.IntroductionContributionTR41.1.1/05-05-013,theliaisonfromETSIAT-A,transmitsthejust-approvedETSITS102971(2005-04),Harmonizedspecificationofphysicalandelectri
8、calcharacteristicsofa2-wireanalogueinterfaceforshortlines.Asstatedinthecovernote,themaximumlinelengthontheanalogsideislimitedto100W,whichcorrespondstoabout1200feetofAWG26cable.Indiscussion,theChair,BerndtMartensonmentionedthatheactuallyhadnore
