ITU-T G.108 Erratum 1 (12 2000) (英) Application of the E-model ……

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1、COVERINGNOTEGENERALSECRETARIATINTERNATIONALTELECOMMUNICATIONUNIONSubject:ErratumGeneva,7December2000RecommendationITU-TG.108(09/99)TELECOMMUNICATIONSTANDARDIZATIONSECTOROFITUITU-TRecommendationG.108(09/99)ApplicationoftheE-model:Aplanningguide1.ThefollowingTab

2、leofFiguresandTableofTablesshouldbeinsertedunder"Contents".TABLEOFFIGURESPageFigure1/G.108–Basicconfigurationfortheinterconnectionbetweenprivateandpublicnetwork.........................12Figure2/G.108–Standardconfigurationwithafullydigitalroutingwithinthepriva

3、tenetwork.............................13Figure3/G.108–PrivateNetworkwith4-wire/2-wireConversion...........................................................................14Figure4/G.108–Digitallyconnectedwirelesstelephoneset....................................

4、................................................14Figure5/G.108–BasicconnectionbetweenthePSTNandanIPnetworkwithitsH.323terminalandaPBXconnectedviaanIWF.............................................................................................................

5、........................15Figure6/G.108–TheE-Modelintheenvironmentofsubjectiveandobjectivetesting............................................17Figure7/G.108–Generalconfigurationforcallsviapublicnetworks..........................................................

6、............17Figure8/G.108–Examplefortheadditionofimpairmentsona"Psychologicalscale"...........................................18Figure9/G.108–RelationbetweenOLRandE-ModelRatingR.............................................................................21Fi

7、gure10/G.108–E-ModelRatingRduetotalkerecho..........................................................................................22Figure11/G.108–Relationbetweenabsolutedelay(Ta)andE-ModelRatingR.....................................................23Figure1

8、2/G.108–RelationbetweenthenumberofqduandE-ModelRatingR......................................................26Figure13/G.108–ReferenceconnectionforthecalculationofSLRandRLR........