ITU-T G.108 Amendment 1 (09 2003) (英) Application of the E-model……

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1、INTERNATIONALTELECOMMUNICATIONUNIONITU-TG.108TELECOMMUNICATIONAmendment1STANDARDIZATIONSECTOR(09/2003)OFITUSERIESG:TRANSMISSIONSYSTEMSANDMEDIA,DIGITALSYSTEMSANDNETWORKSInternationaltelephoneconnectionsandcircuits–GeneraldefinitionsApplicationoftheE-model:AplanningguideAmendment1:NewAppendixI:Therel

2、ationshipbetweenandinteractionoftalkerechoandabsolutedelayITU-TRecommendationG.108(1999)–Amendment1ITU-TG-SERIESRECOMMENDATIONSTRANSMISSIONSYSTEMSANDMEDIA,DIGITALSYSTEMSANDNETWORKSINTERNATIONALTELEPHONECONNECTIONSANDCIRCUITSG.100–G.199GeneraldefinitionsG.100–G.109GeneralRecommendationsonthetransmis

3、sionqualityforanentireinternationaltelephoneG.110–G.119connectionGeneralcharacteristicsofnationalsystemsformingpartofinternationalconnectionsG.120–G.129Generalcharacteristicsofthe4-wirechainformedbytheinternationalcircuitsandnationalG.130–G.139extensioncircuitsGeneralcharacteristicsofthe4-wirechain

4、ofinternationalcircuits;internationaltransitG.140–G.149GeneralcharacteristicsofinternationaltelephonecircuitsandnationalextensioncircuitsG.150–G.159Apparatusassociatedwithlong-distancetelephonecircuitsG.160–G.169TransmissionplanaspectsofspecialcircuitsandconnectionsusingtheinternationaltelephoneG.1

5、70–G.179connectionnetworkProtectionandrestorationoftransmissionsystemsG.180–G.189SoftwaretoolsfortransmissionsystemsG.190–G.199GENERALCHARACTERISTICSCOMMONTOALLANALOGUECARRIER-G.200–G.299TRANSMISSIONSYSTEMSINDIVIDUALCHARACTERISTICSOFINTERNATIONALCARRIERTELEPHONEG.300–G.399SYSTEMSONMETALLICLINESGENE

6、RALCHARACTERISTICSOFINTERNATIONALCARRIERTELEPHONEG.400–G.449SYSTEMSONRADIO-RELAYORSATELLITELINKSANDINTERCONNECTIONWITHMETALLICLINESCOORDINATIONOFRADIOTELEPHONYANDLINETELEPHONYG.450–G.499TESTINGEQUIPMENTSG.500–G.599TRANSMISSIONMEDIACHARACTERISTICSG.600–G.699DIGITALTERMINALEQUIPMENTSG.700–G.799DIGITA

7、LNETWORKSG.800–G.899DIGITALSECTIONSANDDIGITALLINESYSTEMG.900–G.999QUALITYOFSERVICEANDPERFORMANCE-GENERICANDUSER-RELATEDG.1000–G.1999ASPECTSTRANSMISSIONMEDIACHARACTERISTICSG.6000–G.6999DIGITALTERMINALEQUIPME